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<section id='main' class="content source"><pre class="line-numbers"><span id="1"> 1</span>
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|
||
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||
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||
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|
||
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|
||
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||
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|
||
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|
||
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|
||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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||
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|
||
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||
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||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
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|
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|
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|
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|
||
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|
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|
||
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|
||
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|
||
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|
||
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|
||
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|
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|
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
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|
||
<span id="852"> 852</span>
|
||
<span id="853"> 853</span>
|
||
<span id="854"> 854</span>
|
||
<span id="855"> 855</span>
|
||
<span id="856"> 856</span>
|
||
<span id="857"> 857</span>
|
||
<span id="858"> 858</span>
|
||
<span id="859"> 859</span>
|
||
<span id="860"> 860</span>
|
||
<span id="861"> 861</span>
|
||
<span id="862"> 862</span>
|
||
<span id="863"> 863</span>
|
||
<span id="864"> 864</span>
|
||
<span id="865"> 865</span>
|
||
<span id="866"> 866</span>
|
||
<span id="867"> 867</span>
|
||
<span id="868"> 868</span>
|
||
<span id="869"> 869</span>
|
||
<span id="870"> 870</span>
|
||
<span id="871"> 871</span>
|
||
<span id="872"> 872</span>
|
||
<span id="873"> 873</span>
|
||
<span id="874"> 874</span>
|
||
<span id="875"> 875</span>
|
||
<span id="876"> 876</span>
|
||
<span id="877"> 877</span>
|
||
<span id="878"> 878</span>
|
||
<span id="879"> 879</span>
|
||
<span id="880"> 880</span>
|
||
<span id="881"> 881</span>
|
||
<span id="882"> 882</span>
|
||
<span id="883"> 883</span>
|
||
<span id="884"> 884</span>
|
||
<span id="885"> 885</span>
|
||
<span id="886"> 886</span>
|
||
<span id="887"> 887</span>
|
||
<span id="888"> 888</span>
|
||
<span id="889"> 889</span>
|
||
<span id="890"> 890</span>
|
||
<span id="891"> 891</span>
|
||
<span id="892"> 892</span>
|
||
<span id="893"> 893</span>
|
||
<span id="894"> 894</span>
|
||
<span id="895"> 895</span>
|
||
<span id="896"> 896</span>
|
||
<span id="897"> 897</span>
|
||
<span id="898"> 898</span>
|
||
<span id="899"> 899</span>
|
||
<span id="900"> 900</span>
|
||
<span id="901"> 901</span>
|
||
<span id="902"> 902</span>
|
||
<span id="903"> 903</span>
|
||
<span id="904"> 904</span>
|
||
<span id="905"> 905</span>
|
||
<span id="906"> 906</span>
|
||
<span id="907"> 907</span>
|
||
<span id="908"> 908</span>
|
||
<span id="909"> 909</span>
|
||
<span id="910"> 910</span>
|
||
<span id="911"> 911</span>
|
||
<span id="912"> 912</span>
|
||
<span id="913"> 913</span>
|
||
<span id="914"> 914</span>
|
||
<span id="915"> 915</span>
|
||
<span id="916"> 916</span>
|
||
<span id="917"> 917</span>
|
||
<span id="918"> 918</span>
|
||
<span id="919"> 919</span>
|
||
<span id="920"> 920</span>
|
||
<span id="921"> 921</span>
|
||
<span id="922"> 922</span>
|
||
<span id="923"> 923</span>
|
||
<span id="924"> 924</span>
|
||
<span id="925"> 925</span>
|
||
<span id="926"> 926</span>
|
||
<span id="927"> 927</span>
|
||
<span id="928"> 928</span>
|
||
<span id="929"> 929</span>
|
||
<span id="930"> 930</span>
|
||
<span id="931"> 931</span>
|
||
<span id="932"> 932</span>
|
||
<span id="933"> 933</span>
|
||
<span id="934"> 934</span>
|
||
<span id="935"> 935</span>
|
||
<span id="936"> 936</span>
|
||
<span id="937"> 937</span>
|
||
<span id="938"> 938</span>
|
||
<span id="939"> 939</span>
|
||
<span id="940"> 940</span>
|
||
<span id="941"> 941</span>
|
||
<span id="942"> 942</span>
|
||
<span id="943"> 943</span>
|
||
<span id="944"> 944</span>
|
||
<span id="945"> 945</span>
|
||
<span id="946"> 946</span>
|
||
<span id="947"> 947</span>
|
||
<span id="948"> 948</span>
|
||
<span id="949"> 949</span>
|
||
<span id="950"> 950</span>
|
||
<span id="951"> 951</span>
|
||
<span id="952"> 952</span>
|
||
<span id="953"> 953</span>
|
||
<span id="954"> 954</span>
|
||
<span id="955"> 955</span>
|
||
<span id="956"> 956</span>
|
||
<span id="957"> 957</span>
|
||
<span id="958"> 958</span>
|
||
<span id="959"> 959</span>
|
||
<span id="960"> 960</span>
|
||
<span id="961"> 961</span>
|
||
<span id="962"> 962</span>
|
||
<span id="963"> 963</span>
|
||
<span id="964"> 964</span>
|
||
<span id="965"> 965</span>
|
||
<span id="966"> 966</span>
|
||
<span id="967"> 967</span>
|
||
<span id="968"> 968</span>
|
||
<span id="969"> 969</span>
|
||
<span id="970"> 970</span>
|
||
<span id="971"> 971</span>
|
||
<span id="972"> 972</span>
|
||
<span id="973"> 973</span>
|
||
<span id="974"> 974</span>
|
||
<span id="975"> 975</span>
|
||
<span id="976"> 976</span>
|
||
<span id="977"> 977</span>
|
||
<span id="978"> 978</span>
|
||
<span id="979"> 979</span>
|
||
<span id="980"> 980</span>
|
||
<span id="981"> 981</span>
|
||
<span id="982"> 982</span>
|
||
<span id="983"> 983</span>
|
||
<span id="984"> 984</span>
|
||
<span id="985"> 985</span>
|
||
<span id="986"> 986</span>
|
||
<span id="987"> 987</span>
|
||
<span id="988"> 988</span>
|
||
<span id="989"> 989</span>
|
||
<span id="990"> 990</span>
|
||
<span id="991"> 991</span>
|
||
<span id="992"> 992</span>
|
||
<span id="993"> 993</span>
|
||
<span id="994"> 994</span>
|
||
<span id="995"> 995</span>
|
||
<span id="996"> 996</span>
|
||
<span id="997"> 997</span>
|
||
<span id="998"> 998</span>
|
||
<span id="999"> 999</span>
|
||
<span id="1000">1000</span>
|
||
<span id="1001">1001</span>
|
||
<span id="1002">1002</span>
|
||
<span id="1003">1003</span>
|
||
<span id="1004">1004</span>
|
||
<span id="1005">1005</span>
|
||
<span id="1006">1006</span>
|
||
<span id="1007">1007</span>
|
||
<span id="1008">1008</span>
|
||
<span id="1009">1009</span>
|
||
<span id="1010">1010</span>
|
||
<span id="1011">1011</span>
|
||
<span id="1012">1012</span>
|
||
<span id="1013">1013</span>
|
||
<span id="1014">1014</span>
|
||
<span id="1015">1015</span>
|
||
<span id="1016">1016</span>
|
||
<span id="1017">1017</span>
|
||
<span id="1018">1018</span>
|
||
<span id="1019">1019</span>
|
||
<span id="1020">1020</span>
|
||
<span id="1021">1021</span>
|
||
<span id="1022">1022</span>
|
||
<span id="1023">1023</span>
|
||
<span id="1024">1024</span>
|
||
<span id="1025">1025</span>
|
||
<span id="1026">1026</span>
|
||
<span id="1027">1027</span>
|
||
<span id="1028">1028</span>
|
||
<span id="1029">1029</span>
|
||
<span id="1030">1030</span>
|
||
<span id="1031">1031</span>
|
||
<span id="1032">1032</span>
|
||
<span id="1033">1033</span>
|
||
<span id="1034">1034</span>
|
||
<span id="1035">1035</span>
|
||
<span id="1036">1036</span>
|
||
<span id="1037">1037</span>
|
||
<span id="1038">1038</span>
|
||
<span id="1039">1039</span>
|
||
<span id="1040">1040</span>
|
||
<span id="1041">1041</span>
|
||
<span id="1042">1042</span>
|
||
<span id="1043">1043</span>
|
||
<span id="1044">1044</span>
|
||
<span id="1045">1045</span>
|
||
<span id="1046">1046</span>
|
||
<span id="1047">1047</span>
|
||
<span id="1048">1048</span>
|
||
<span id="1049">1049</span>
|
||
<span id="1050">1050</span>
|
||
<span id="1051">1051</span>
|
||
<span id="1052">1052</span>
|
||
<span id="1053">1053</span>
|
||
<span id="1054">1054</span>
|
||
<span id="1055">1055</span>
|
||
<span id="1056">1056</span>
|
||
<span id="1057">1057</span>
|
||
<span id="1058">1058</span>
|
||
<span id="1059">1059</span>
|
||
<span id="1060">1060</span>
|
||
<span id="1061">1061</span>
|
||
</pre><pre class='rust '>
|
||
<span class='comment'>// Copyright 2014-2016 The Rust Project Developers. See the COPYRIGHT</span>
|
||
<span class='comment'>// file at the top-level directory of this distribution and at</span>
|
||
<span class='comment'>// http://rust-lang.org/COPYRIGHT.</span>
|
||
<span class='comment'>//</span>
|
||
<span class='comment'>// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span>
|
||
<span class='comment'>// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span>
|
||
<span class='comment'>// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your</span>
|
||
<span class='comment'>// option. This file may not be copied, modified, or distributed</span>
|
||
<span class='comment'>// except according to those terms.</span>
|
||
|
||
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>collections</span>::<span class='ident'>HashMap</span>;
|
||
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>iter</span>;
|
||
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>result</span>;
|
||
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>sync</span>::<span class='ident'>Arc</span>;
|
||
|
||
<span class='kw'>use</span> <span class='ident'>syntax</span>::{<span class='ident'>Expr</span>, <span class='ident'>Repeater</span>, <span class='ident'>CharClass</span>, <span class='ident'>ClassRange</span>, <span class='ident'>ByteClass</span>, <span class='ident'>ByteRange</span>};
|
||
<span class='kw'>use</span> <span class='ident'>utf8_ranges</span>::{<span class='ident'>Utf8Range</span>, <span class='ident'>Utf8Sequence</span>, <span class='ident'>Utf8Sequences</span>};
|
||
|
||
<span class='kw'>use</span> <span class='ident'>prog</span>::{
|
||
<span class='ident'>Program</span>, <span class='ident'>Inst</span>, <span class='ident'>InstPtr</span>, <span class='ident'>EmptyLook</span>,
|
||
<span class='ident'>InstSave</span>, <span class='ident'>InstSplit</span>, <span class='ident'>InstEmptyLook</span>, <span class='ident'>InstChar</span>, <span class='ident'>InstRanges</span>, <span class='ident'>InstBytes</span>,
|
||
};
|
||
|
||
<span class='kw'>use</span> <span class='ident'>Error</span>;
|
||
|
||
<span class='kw'>type</span> <span class='ident'>InstHoleIdx</span> <span class='op'>=</span> <span class='ident'>InstPtr</span>;
|
||
|
||
<span class='kw'>type</span> <span class='prelude-ty'>Result</span> <span class='op'>=</span> <span class='ident'>result</span>::<span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Patch</span>, <span class='ident'>Error</span><span class='op'>></span>;
|
||
|
||
<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Debug</span>)]</span>
|
||
<span class='kw'>struct</span> <span class='ident'>Patch</span> {
|
||
<span class='ident'>hole</span>: <span class='ident'>Hole</span>,
|
||
<span class='ident'>entry</span>: <span class='ident'>InstPtr</span>,
|
||
}
|
||
|
||
<span class='doccomment'>/// A compiler translates a regular expression AST to a sequence of</span>
|
||
<span class='doccomment'>/// instructions. The sequence of instructions represents an NFA.</span>
|
||
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>Compiler</span> {
|
||
<span class='ident'>insts</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>MaybeInst</span><span class='op'>></span>,
|
||
<span class='ident'>compiled</span>: <span class='ident'>Program</span>,
|
||
<span class='ident'>capture_name_idx</span>: <span class='ident'>HashMap</span><span class='op'><</span><span class='ident'>String</span>, <span class='ident'>usize</span><span class='op'>></span>,
|
||
<span class='ident'>num_exprs</span>: <span class='ident'>usize</span>,
|
||
<span class='ident'>size_limit</span>: <span class='ident'>usize</span>,
|
||
<span class='ident'>suffix_cache</span>: <span class='ident'>SuffixCache</span>,
|
||
<span class='ident'>utf8_seqs</span>: <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>Utf8Sequences</span><span class='op'>></span>,
|
||
<span class='ident'>byte_classes</span>: <span class='ident'>ByteClassSet</span>,
|
||
}
|
||
|
||
<span class='kw'>impl</span> <span class='ident'>Compiler</span> {
|
||
<span class='doccomment'>/// Create a new regular expression compiler.</span>
|
||
<span class='doccomment'>///</span>
|
||
<span class='doccomment'>/// Various options can be set before calling `compile` on an expression.</span>
|
||
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span>() <span class='op'>-></span> <span class='kw'>Self</span> {
|
||
<span class='ident'>Compiler</span> {
|
||
<span class='ident'>insts</span>: <span class='macro'>vec</span><span class='macro'>!</span>[],
|
||
<span class='ident'>compiled</span>: <span class='ident'>Program</span>::<span class='ident'>new</span>(),
|
||
<span class='ident'>capture_name_idx</span>: <span class='ident'>HashMap</span>::<span class='ident'>new</span>(),
|
||
<span class='ident'>num_exprs</span>: <span class='number'>0</span>,
|
||
<span class='ident'>size_limit</span>: <span class='number'>10</span> <span class='op'>*</span> (<span class='number'>1</span> <span class='op'><<</span> <span class='number'>20</span>),
|
||
<span class='ident'>suffix_cache</span>: <span class='ident'>SuffixCache</span>::<span class='ident'>new</span>(<span class='number'>1000</span>),
|
||
<span class='ident'>utf8_seqs</span>: <span class='prelude-val'>Some</span>(<span class='ident'>Utf8Sequences</span>::<span class='ident'>new</span>(<span class='string'>'\x00'</span>, <span class='string'>'\x00'</span>)),
|
||
<span class='ident'>byte_classes</span>: <span class='ident'>ByteClassSet</span>::<span class='ident'>new</span>(),
|
||
}
|
||
}
|
||
|
||
<span class='doccomment'>/// The size of the resulting program is limited by size_limit. If</span>
|
||
<span class='doccomment'>/// the program approximately exceeds the given size (in bytes), then</span>
|
||
<span class='doccomment'>/// compilation will stop and return an error.</span>
|
||
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>size_limit</span>(<span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>size_limit</span>: <span class='ident'>usize</span>) <span class='op'>-></span> <span class='kw'>Self</span> {
|
||
<span class='self'>self</span>.<span class='ident'>size_limit</span> <span class='op'>=</span> <span class='ident'>size_limit</span>;
|
||
<span class='self'>self</span>
|
||
}
|
||
|
||
<span class='doccomment'>/// If bytes is true, then the program is compiled as a byte based</span>
|
||
<span class='doccomment'>/// automaton, which incorporates UTF-8 decoding into the machine. If it's</span>
|
||
<span class='doccomment'>/// false, then the automaton is Unicode scalar value based, e.g., an</span>
|
||
<span class='doccomment'>/// engine utilizing such an automaton is resposible for UTF-8 decoding.</span>
|
||
<span class='doccomment'>///</span>
|
||
<span class='doccomment'>/// The specific invariant is that when returning a byte based machine,</span>
|
||
<span class='doccomment'>/// the neither the `Char` nor `Ranges` instructions are produced.</span>
|
||
<span class='doccomment'>/// Conversely, when producing a Unicode scalar value machine, the `Bytes`</span>
|
||
<span class='doccomment'>/// instruction is never produced.</span>
|
||
<span class='doccomment'>///</span>
|
||
<span class='doccomment'>/// Note that `dfa(true)` implies `bytes(true)`.</span>
|
||
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>bytes</span>(<span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>yes</span>: <span class='ident'>bool</span>) <span class='op'>-></span> <span class='kw'>Self</span> {
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>is_bytes</span> <span class='op'>=</span> <span class='ident'>yes</span>;
|
||
<span class='self'>self</span>
|
||
}
|
||
|
||
<span class='doccomment'>/// When disabled, the program compiled may match arbitrary bytes.</span>
|
||
<span class='doccomment'>///</span>
|
||
<span class='doccomment'>/// When enabled (the default), all compiled programs exclusively match</span>
|
||
<span class='doccomment'>/// valid UTF-8 bytes.</span>
|
||
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>only_utf8</span>(<span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>yes</span>: <span class='ident'>bool</span>) <span class='op'>-></span> <span class='kw'>Self</span> {
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>only_utf8</span> <span class='op'>=</span> <span class='ident'>yes</span>;
|
||
<span class='self'>self</span>
|
||
}
|
||
|
||
<span class='doccomment'>/// When set, the machine returned is suitable for use in the DFA matching</span>
|
||
<span class='doccomment'>/// engine.</span>
|
||
<span class='doccomment'>///</span>
|
||
<span class='doccomment'>/// In particular, this ensures that if the regex is not anchored in the</span>
|
||
<span class='doccomment'>/// beginning, then a preceding `.*?` is included in the program. (The NFA</span>
|
||
<span class='doccomment'>/// based engines handle the preceding `.*?` explicitly, which is difficult</span>
|
||
<span class='doccomment'>/// or impossible in the DFA engine.)</span>
|
||
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>dfa</span>(<span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>yes</span>: <span class='ident'>bool</span>) <span class='op'>-></span> <span class='kw'>Self</span> {
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>is_dfa</span> <span class='op'>=</span> <span class='ident'>yes</span>;
|
||
<span class='self'>self</span>
|
||
}
|
||
|
||
<span class='doccomment'>/// When set, the machine returned is suitable for matching text in</span>
|
||
<span class='doccomment'>/// reverse. In particular, all concatenations are flipped.</span>
|
||
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>reverse</span>(<span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>yes</span>: <span class='ident'>bool</span>) <span class='op'>-></span> <span class='kw'>Self</span> {
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>is_reverse</span> <span class='op'>=</span> <span class='ident'>yes</span>;
|
||
<span class='self'>self</span>
|
||
}
|
||
|
||
<span class='doccomment'>/// Compile a regular expression given its AST.</span>
|
||
<span class='doccomment'>///</span>
|
||
<span class='doccomment'>/// The compiler is guaranteed to succeed unless the program exceeds the</span>
|
||
<span class='doccomment'>/// specified size limit. If the size limit is exceeded, then compilation</span>
|
||
<span class='doccomment'>/// stops and returns an error.</span>
|
||
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>compile</span>(
|
||
<span class='kw-2'>mut</span> <span class='self'>self</span>,
|
||
<span class='ident'>exprs</span>: <span class='kw-2'>&</span>[<span class='ident'>Expr</span>],
|
||
) <span class='op'>-></span> <span class='ident'>result</span>::<span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Program</span>, <span class='ident'>Error</span><span class='op'>></span> {
|
||
<span class='macro'>debug_assert</span><span class='macro'>!</span>(<span class='ident'>exprs</span>.<span class='ident'>len</span>() <span class='op'>>=</span> <span class='number'>1</span>);
|
||
<span class='self'>self</span>.<span class='ident'>num_exprs</span> <span class='op'>=</span> <span class='ident'>exprs</span>.<span class='ident'>len</span>();
|
||
<span class='kw'>if</span> <span class='ident'>exprs</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='number'>1</span> {
|
||
<span class='self'>self</span>.<span class='ident'>compile_one</span>(<span class='kw-2'>&</span><span class='ident'>exprs</span>[<span class='number'>0</span>])
|
||
} <span class='kw'>else</span> {
|
||
<span class='self'>self</span>.<span class='ident'>compile_many</span>(<span class='ident'>exprs</span>)
|
||
}
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>compile_one</span>(<span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>expr</span>: <span class='kw-2'>&</span><span class='ident'>Expr</span>) <span class='op'>-></span> <span class='ident'>result</span>::<span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Program</span>, <span class='ident'>Error</span><span class='op'>></span> {
|
||
<span class='comment'>// If we're compiling a forward DFA and we aren't anchored, then</span>
|
||
<span class='comment'>// add a `.*?` before the first capture group.</span>
|
||
<span class='comment'>// Other matching engines handle this by baking the logic into the</span>
|
||
<span class='comment'>// matching engine itself.</span>
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>dotstar_patch</span> <span class='op'>=</span> <span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>Hole</span>::<span class='prelude-val'>None</span>, <span class='ident'>entry</span>: <span class='number'>0</span> };
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>is_anchored_start</span> <span class='op'>=</span> <span class='ident'>expr</span>.<span class='ident'>is_anchored_start</span>();
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>is_anchored_end</span> <span class='op'>=</span> <span class='ident'>expr</span>.<span class='ident'>is_anchored_end</span>();
|
||
<span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>needs_dotstar</span>() {
|
||
<span class='ident'>dotstar_patch</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c_dotstar</span>());
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>start</span> <span class='op'>=</span> <span class='ident'>dotstar_patch</span>.<span class='ident'>entry</span>;
|
||
}
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>captures</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[<span class='prelude-val'>None</span>];
|
||
<span class='kw'>let</span> <span class='ident'>patch</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c_capture</span>(<span class='number'>0</span>, <span class='ident'>expr</span>));
|
||
<span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>needs_dotstar</span>() {
|
||
<span class='self'>self</span>.<span class='ident'>fill</span>(<span class='ident'>dotstar_patch</span>.<span class='ident'>hole</span>, <span class='ident'>patch</span>.<span class='ident'>entry</span>);
|
||
} <span class='kw'>else</span> {
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>start</span> <span class='op'>=</span> <span class='ident'>patch</span>.<span class='ident'>entry</span>;
|
||
}
|
||
<span class='self'>self</span>.<span class='ident'>fill_to_next</span>(<span class='ident'>patch</span>.<span class='ident'>hole</span>);
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>matches</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[<span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>()];
|
||
<span class='self'>self</span>.<span class='ident'>push_compiled</span>(<span class='ident'>Inst</span>::<span class='ident'>Match</span>(<span class='number'>0</span>));
|
||
<span class='self'>self</span>.<span class='ident'>compile_finish</span>()
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>compile_many</span>(
|
||
<span class='kw-2'>mut</span> <span class='self'>self</span>,
|
||
<span class='ident'>exprs</span>: <span class='kw-2'>&</span>[<span class='ident'>Expr</span>],
|
||
) <span class='op'>-></span> <span class='ident'>result</span>::<span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Program</span>, <span class='ident'>Error</span><span class='op'>></span> {
|
||
<span class='macro'>debug_assert</span><span class='macro'>!</span>(<span class='ident'>exprs</span>.<span class='ident'>len</span>() <span class='op'>></span> <span class='number'>1</span>);
|
||
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>is_anchored_start</span> <span class='op'>=</span>
|
||
<span class='ident'>exprs</span>.<span class='ident'>iter</span>().<span class='ident'>all</span>(<span class='op'>|</span><span class='ident'>e</span><span class='op'>|</span> <span class='ident'>e</span>.<span class='ident'>is_anchored_start</span>());
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>is_anchored_end</span> <span class='op'>=</span>
|
||
<span class='ident'>exprs</span>.<span class='ident'>iter</span>().<span class='ident'>all</span>(<span class='op'>|</span><span class='ident'>e</span><span class='op'>|</span> <span class='ident'>e</span>.<span class='ident'>is_anchored_end</span>());
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>dotstar_patch</span> <span class='op'>=</span> <span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>Hole</span>::<span class='prelude-val'>None</span>, <span class='ident'>entry</span>: <span class='number'>0</span> };
|
||
<span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>needs_dotstar</span>() {
|
||
<span class='ident'>dotstar_patch</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c_dotstar</span>());
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>start</span> <span class='op'>=</span> <span class='ident'>dotstar_patch</span>.<span class='ident'>entry</span>;
|
||
} <span class='kw'>else</span> {
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>start</span> <span class='op'>=</span> <span class='number'>0</span>; <span class='comment'>// first instruction is always split</span>
|
||
}
|
||
<span class='self'>self</span>.<span class='ident'>fill_to_next</span>(<span class='ident'>dotstar_patch</span>.<span class='ident'>hole</span>);
|
||
|
||
<span class='kw'>for</span> (<span class='ident'>i</span>, <span class='ident'>expr</span>) <span class='kw'>in</span> <span class='ident'>exprs</span>[<span class='number'>0</span>..<span class='ident'>exprs</span>.<span class='ident'>len</span>() <span class='op'>-</span> <span class='number'>1</span>].<span class='ident'>iter</span>().<span class='ident'>enumerate</span>() {
|
||
<span class='kw'>let</span> <span class='ident'>split</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>push_split_hole</span>();
|
||
<span class='kw'>let</span> <span class='ident'>Patch</span> { <span class='ident'>hole</span>, <span class='ident'>entry</span> } <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c_capture</span>(<span class='number'>0</span>, <span class='ident'>expr</span>));
|
||
<span class='self'>self</span>.<span class='ident'>fill_to_next</span>(<span class='ident'>hole</span>);
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>matches</span>.<span class='ident'>push</span>(<span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>());
|
||
<span class='self'>self</span>.<span class='ident'>push_compiled</span>(<span class='ident'>Inst</span>::<span class='ident'>Match</span>(<span class='ident'>i</span>));
|
||
|
||
<span class='kw'>let</span> <span class='ident'>next</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>();
|
||
<span class='self'>self</span>.<span class='ident'>fill_split</span>(<span class='ident'>split</span>, <span class='prelude-val'>Some</span>(<span class='ident'>entry</span>), <span class='prelude-val'>Some</span>(<span class='ident'>next</span>));
|
||
}
|
||
<span class='kw'>let</span> <span class='ident'>i</span> <span class='op'>=</span> <span class='ident'>exprs</span>.<span class='ident'>len</span>() <span class='op'>-</span> <span class='number'>1</span>;
|
||
<span class='kw'>let</span> <span class='ident'>Patch</span> { <span class='ident'>hole</span>, .. } <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c_capture</span>(<span class='number'>0</span>, <span class='kw-2'>&</span><span class='ident'>exprs</span>[<span class='ident'>i</span>]));
|
||
<span class='self'>self</span>.<span class='ident'>fill_to_next</span>(<span class='ident'>hole</span>);
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>matches</span>.<span class='ident'>push</span>(<span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>());
|
||
<span class='self'>self</span>.<span class='ident'>push_compiled</span>(<span class='ident'>Inst</span>::<span class='ident'>Match</span>(<span class='ident'>i</span>));
|
||
<span class='self'>self</span>.<span class='ident'>compile_finish</span>()
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>compile_finish</span>(<span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>result</span>::<span class='prelude-ty'>Result</span><span class='op'><</span><span class='ident'>Program</span>, <span class='ident'>Error</span><span class='op'>></span> {
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>insts</span> <span class='op'>=</span>
|
||
<span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>into_iter</span>().<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>inst</span><span class='op'>|</span> <span class='ident'>inst</span>.<span class='ident'>unwrap</span>()).<span class='ident'>collect</span>();
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>byte_classes</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>byte_classes</span>.<span class='ident'>byte_classes</span>();
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>capture_name_idx</span> <span class='op'>=</span> <span class='ident'>Arc</span>::<span class='ident'>new</span>(<span class='self'>self</span>.<span class='ident'>capture_name_idx</span>);
|
||
<span class='prelude-val'>Ok</span>(<span class='self'>self</span>.<span class='ident'>compiled</span>)
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>expr</span>: <span class='kw-2'>&</span><span class='ident'>Expr</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='kw'>use</span> <span class='ident'>prog</span>;
|
||
<span class='kw'>use</span> <span class='ident'>syntax</span>::<span class='ident'>Expr</span>::<span class='op'>*</span>;
|
||
|
||
<span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>check_size</span>());
|
||
<span class='kw'>match</span> <span class='op'>*</span><span class='ident'>expr</span> {
|
||
<span class='ident'>Empty</span> <span class='op'>=></span> <span class='prelude-val'>Ok</span>(<span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>Hole</span>::<span class='prelude-val'>None</span>, <span class='ident'>entry</span>: <span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>() }),
|
||
<span class='ident'>Literal</span> { <span class='kw-2'>ref</span> <span class='ident'>chars</span>, <span class='ident'>casei</span> } <span class='op'>=></span> <span class='self'>self</span>.<span class='ident'>c_literal</span>(<span class='ident'>chars</span>, <span class='ident'>casei</span>),
|
||
<span class='ident'>LiteralBytes</span> { <span class='kw-2'>ref</span> <span class='ident'>bytes</span>, <span class='ident'>casei</span> } <span class='op'>=></span> <span class='self'>self</span>.<span class='ident'>c_bytes</span>(<span class='ident'>bytes</span>, <span class='ident'>casei</span>),
|
||
<span class='ident'>AnyChar</span> <span class='op'>=></span> <span class='self'>self</span>.<span class='ident'>c_class</span>(<span class='kw-2'>&</span>[<span class='ident'>ClassRange</span> {
|
||
<span class='ident'>start</span>: <span class='string'>'\x00'</span>,
|
||
<span class='ident'>end</span>: <span class='string'>'\u{10ffff}'</span>,
|
||
}]),
|
||
<span class='ident'>AnyCharNoNL</span> <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_class</span>(<span class='kw-2'>&</span>[
|
||
<span class='ident'>ClassRange</span> { <span class='ident'>start</span>: <span class='string'>'\x00'</span>, <span class='ident'>end</span>: <span class='string'>'\x09'</span> },
|
||
<span class='ident'>ClassRange</span> { <span class='ident'>start</span>: <span class='string'>'\x0b'</span>, <span class='ident'>end</span>: <span class='string'>'\u{10ffff}'</span> },
|
||
])
|
||
}
|
||
<span class='ident'>AnyByte</span> <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_class_bytes</span>(<span class='kw-2'>&</span>[<span class='ident'>ByteRange</span> { <span class='ident'>start</span>: <span class='number'>0</span>, <span class='ident'>end</span>: <span class='number'>0xFF</span> }])
|
||
}
|
||
<span class='ident'>AnyByteNoNL</span> <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_class_bytes</span>(<span class='kw-2'>&</span>[
|
||
<span class='ident'>ByteRange</span> { <span class='ident'>start</span>: <span class='number'>0</span>, <span class='ident'>end</span>: <span class='number'>0x9</span> },
|
||
<span class='ident'>ByteRange</span> { <span class='ident'>start</span>: <span class='number'>0xB</span>, <span class='ident'>end</span>: <span class='number'>0xFF</span> },
|
||
])
|
||
}
|
||
<span class='ident'>Class</span>(<span class='kw-2'>ref</span> <span class='ident'>cls</span>) <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_class</span>(<span class='ident'>cls</span>)
|
||
}
|
||
<span class='ident'>ClassBytes</span>(<span class='kw-2'>ref</span> <span class='ident'>cls</span>) <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_class_bytes</span>(<span class='ident'>cls</span>)
|
||
}
|
||
<span class='ident'>StartLine</span> <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>is_reverse</span> <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>byte_classes</span>.<span class='ident'>set_range</span>(<span class='string'>b'\n'</span>, <span class='string'>b'\n'</span>);
|
||
<span class='self'>self</span>.<span class='ident'>c_empty_look</span>(<span class='ident'>prog</span>::<span class='ident'>EmptyLook</span>::<span class='ident'>EndLine</span>)
|
||
}
|
||
<span class='ident'>StartLine</span> <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>byte_classes</span>.<span class='ident'>set_range</span>(<span class='string'>b'\n'</span>, <span class='string'>b'\n'</span>);
|
||
<span class='self'>self</span>.<span class='ident'>c_empty_look</span>(<span class='ident'>prog</span>::<span class='ident'>EmptyLook</span>::<span class='ident'>StartLine</span>)
|
||
}
|
||
<span class='ident'>EndLine</span> <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>is_reverse</span> <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>byte_classes</span>.<span class='ident'>set_range</span>(<span class='string'>b'\n'</span>, <span class='string'>b'\n'</span>);
|
||
<span class='self'>self</span>.<span class='ident'>c_empty_look</span>(<span class='ident'>prog</span>::<span class='ident'>EmptyLook</span>::<span class='ident'>StartLine</span>)
|
||
}
|
||
<span class='ident'>EndLine</span> <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>byte_classes</span>.<span class='ident'>set_range</span>(<span class='string'>b'\n'</span>, <span class='string'>b'\n'</span>);
|
||
<span class='self'>self</span>.<span class='ident'>c_empty_look</span>(<span class='ident'>prog</span>::<span class='ident'>EmptyLook</span>::<span class='ident'>EndLine</span>)
|
||
}
|
||
<span class='ident'>StartText</span> <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>is_reverse</span> <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_empty_look</span>(<span class='ident'>prog</span>::<span class='ident'>EmptyLook</span>::<span class='ident'>EndText</span>)
|
||
}
|
||
<span class='ident'>StartText</span> <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_empty_look</span>(<span class='ident'>prog</span>::<span class='ident'>EmptyLook</span>::<span class='ident'>StartText</span>)
|
||
}
|
||
<span class='ident'>EndText</span> <span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>is_reverse</span> <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_empty_look</span>(<span class='ident'>prog</span>::<span class='ident'>EmptyLook</span>::<span class='ident'>StartText</span>)
|
||
}
|
||
<span class='ident'>EndText</span> <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_empty_look</span>(<span class='ident'>prog</span>::<span class='ident'>EmptyLook</span>::<span class='ident'>EndText</span>)
|
||
}
|
||
<span class='ident'>WordBoundary</span> <span class='op'>=></span> <span class='self'>self</span>.<span class='ident'>c_empty_look</span>(<span class='ident'>prog</span>::<span class='ident'>EmptyLook</span>::<span class='ident'>WordBoundary</span>),
|
||
<span class='ident'>NotWordBoundary</span> <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_empty_look</span>(<span class='ident'>prog</span>::<span class='ident'>EmptyLook</span>::<span class='ident'>NotWordBoundary</span>)
|
||
}
|
||
<span class='ident'>WordBoundaryAscii</span> <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_empty_look</span>(<span class='ident'>prog</span>::<span class='ident'>EmptyLook</span>::<span class='ident'>WordBoundaryAscii</span>)
|
||
}
|
||
<span class='ident'>NotWordBoundaryAscii</span> <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_empty_look</span>(<span class='ident'>prog</span>::<span class='ident'>EmptyLook</span>::<span class='ident'>NotWordBoundaryAscii</span>)
|
||
}
|
||
<span class='ident'>Group</span> { <span class='kw-2'>ref</span> <span class='ident'>e</span>, <span class='ident'>i</span>: <span class='prelude-val'>None</span>, <span class='ident'>name</span>: <span class='prelude-val'>None</span> } <span class='op'>=></span> <span class='self'>self</span>.<span class='ident'>c</span>(<span class='ident'>e</span>),
|
||
<span class='ident'>Group</span> { <span class='kw-2'>ref</span> <span class='ident'>e</span>, <span class='ident'>i</span>, <span class='kw-2'>ref</span> <span class='ident'>name</span> } <span class='op'>=></span> {
|
||
<span class='comment'>// it's impossible to have a named capture without an index</span>
|
||
<span class='kw'>let</span> <span class='ident'>i</span> <span class='op'>=</span> <span class='ident'>i</span>.<span class='ident'>expect</span>(<span class='string'>"capture index"</span>);
|
||
<span class='kw'>if</span> <span class='ident'>i</span> <span class='op'>>=</span> <span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>captures</span>.<span class='ident'>len</span>() {
|
||
<span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>captures</span>.<span class='ident'>push</span>(<span class='ident'>name</span>.<span class='ident'>clone</span>());
|
||
<span class='kw'>if</span> <span class='kw'>let</span> <span class='prelude-val'>Some</span>(<span class='kw-2'>ref</span> <span class='ident'>name</span>) <span class='op'>=</span> <span class='op'>*</span><span class='ident'>name</span> {
|
||
<span class='self'>self</span>.<span class='ident'>capture_name_idx</span>.<span class='ident'>insert</span>(<span class='ident'>name</span>.<span class='ident'>to_owned</span>(), <span class='ident'>i</span>);
|
||
}
|
||
}
|
||
<span class='self'>self</span>.<span class='ident'>c_capture</span>(<span class='number'>2</span> <span class='op'>*</span> <span class='ident'>i</span>, <span class='ident'>e</span>)
|
||
}
|
||
<span class='ident'>Concat</span>(<span class='kw-2'>ref</span> <span class='ident'>es</span>) <span class='op'>=></span> {
|
||
<span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>is_reverse</span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_concat</span>(<span class='ident'>es</span>.<span class='ident'>iter</span>().<span class='ident'>rev</span>())
|
||
} <span class='kw'>else</span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_concat</span>(<span class='ident'>es</span>)
|
||
}
|
||
}
|
||
<span class='ident'>Alternate</span>(<span class='kw-2'>ref</span> <span class='ident'>es</span>) <span class='op'>=></span> <span class='self'>self</span>.<span class='ident'>c_alternate</span>(<span class='kw-2'>&</span><span class='op'>*</span><span class='op'>*</span><span class='ident'>es</span>),
|
||
<span class='ident'>Repeat</span> { <span class='kw-2'>ref</span> <span class='ident'>e</span>, <span class='ident'>r</span>, <span class='ident'>greedy</span> } <span class='op'>=></span> <span class='self'>self</span>.<span class='ident'>c_repeat</span>(<span class='ident'>e</span>, <span class='ident'>r</span>, <span class='ident'>greedy</span>),
|
||
}
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_capture</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>first_slot</span>: <span class='ident'>usize</span>, <span class='ident'>expr</span>: <span class='kw-2'>&</span><span class='ident'>Expr</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>num_exprs</span> <span class='op'>></span> <span class='number'>1</span> <span class='op'>||</span> <span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>is_dfa</span> {
|
||
<span class='comment'>// Don't ever compile Save instructions for regex sets because</span>
|
||
<span class='comment'>// they are never used. They are also never used in DFA programs</span>
|
||
<span class='comment'>// because DFAs can't handle captures.</span>
|
||
<span class='self'>self</span>.<span class='ident'>c</span>(<span class='ident'>expr</span>)
|
||
} <span class='kw'>else</span> {
|
||
<span class='kw'>let</span> <span class='ident'>entry</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>();
|
||
<span class='kw'>let</span> <span class='ident'>hole</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>push_hole</span>(<span class='ident'>InstHole</span>::<span class='ident'>Save</span> { <span class='ident'>slot</span>: <span class='ident'>first_slot</span> });
|
||
<span class='kw'>let</span> <span class='ident'>patch</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c</span>(<span class='ident'>expr</span>));
|
||
<span class='self'>self</span>.<span class='ident'>fill</span>(<span class='ident'>hole</span>, <span class='ident'>patch</span>.<span class='ident'>entry</span>);
|
||
<span class='self'>self</span>.<span class='ident'>fill_to_next</span>(<span class='ident'>patch</span>.<span class='ident'>hole</span>);
|
||
<span class='kw'>let</span> <span class='ident'>hole</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>push_hole</span>(<span class='ident'>InstHole</span>::<span class='ident'>Save</span> { <span class='ident'>slot</span>: <span class='ident'>first_slot</span> <span class='op'>+</span> <span class='number'>1</span> });
|
||
<span class='prelude-val'>Ok</span>(<span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>hole</span>, <span class='ident'>entry</span>: <span class='ident'>entry</span> })
|
||
}
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_dotstar</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='prelude-val'>Ok</span>(<span class='kw'>if</span> <span class='op'>!</span><span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>only_utf8</span>() {
|
||
<span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c</span>(<span class='kw-2'>&</span><span class='ident'>Expr</span>::<span class='ident'>Repeat</span> {
|
||
<span class='ident'>e</span>: <span class='ident'>Box</span>::<span class='ident'>new</span>(<span class='ident'>Expr</span>::<span class='ident'>AnyByte</span>),
|
||
<span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>ZeroOrMore</span>,
|
||
<span class='ident'>greedy</span>: <span class='boolval'>false</span>,
|
||
}))
|
||
} <span class='kw'>else</span> {
|
||
<span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c</span>(<span class='kw-2'>&</span><span class='ident'>Expr</span>::<span class='ident'>Repeat</span> {
|
||
<span class='ident'>e</span>: <span class='ident'>Box</span>::<span class='ident'>new</span>(<span class='ident'>Expr</span>::<span class='ident'>AnyChar</span>),
|
||
<span class='ident'>r</span>: <span class='ident'>Repeater</span>::<span class='ident'>ZeroOrMore</span>,
|
||
<span class='ident'>greedy</span>: <span class='boolval'>false</span>,
|
||
}))
|
||
})
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_literal</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>chars</span>: <span class='kw-2'>&</span>[<span class='ident'>char</span>], <span class='ident'>casei</span>: <span class='ident'>bool</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='macro'>debug_assert</span><span class='macro'>!</span>(<span class='op'>!</span><span class='ident'>chars</span>.<span class='ident'>is_empty</span>());
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>chars</span>: <span class='ident'>Box</span><span class='op'><</span><span class='ident'>Iterator</span><span class='op'><</span><span class='ident'>Item</span><span class='op'>=</span><span class='kw-2'>&</span><span class='ident'>char</span><span class='op'>>></span> <span class='op'>=</span>
|
||
<span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>is_reverse</span> {
|
||
<span class='ident'>Box</span>::<span class='ident'>new</span>(<span class='ident'>chars</span>.<span class='ident'>iter</span>().<span class='ident'>rev</span>())
|
||
} <span class='kw'>else</span> {
|
||
<span class='ident'>Box</span>::<span class='ident'>new</span>(<span class='ident'>chars</span>.<span class='ident'>iter</span>())
|
||
};
|
||
<span class='kw'>let</span> <span class='ident'>first</span> <span class='op'>=</span> <span class='op'>*</span><span class='ident'>chars</span>.<span class='ident'>next</span>().<span class='ident'>expect</span>(<span class='string'>"non-empty literal"</span>);
|
||
<span class='kw'>let</span> <span class='ident'>Patch</span> { <span class='kw-2'>mut</span> <span class='ident'>hole</span>, <span class='ident'>entry</span> } <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c_char</span>(<span class='ident'>first</span>, <span class='ident'>casei</span>));
|
||
<span class='kw'>for</span> <span class='kw-2'>&</span><span class='ident'>c</span> <span class='kw'>in</span> <span class='ident'>chars</span> {
|
||
<span class='kw'>let</span> <span class='ident'>p</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c_char</span>(<span class='ident'>c</span>, <span class='ident'>casei</span>));
|
||
<span class='self'>self</span>.<span class='ident'>fill</span>(<span class='ident'>hole</span>, <span class='ident'>p</span>.<span class='ident'>entry</span>);
|
||
<span class='ident'>hole</span> <span class='op'>=</span> <span class='ident'>p</span>.<span class='ident'>hole</span>;
|
||
}
|
||
<span class='prelude-val'>Ok</span>(<span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>hole</span>, <span class='ident'>entry</span>: <span class='ident'>entry</span> })
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_char</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>c</span>: <span class='ident'>char</span>, <span class='ident'>casei</span>: <span class='ident'>bool</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='kw'>if</span> <span class='ident'>casei</span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_class</span>(<span class='kw-2'>&</span><span class='ident'>CharClass</span>::<span class='ident'>new</span>(<span class='macro'>vec</span><span class='macro'>!</span>[
|
||
<span class='ident'>ClassRange</span> { <span class='ident'>start</span>: <span class='ident'>c</span>, <span class='ident'>end</span>: <span class='ident'>c</span> },
|
||
]).<span class='ident'>case_fold</span>())
|
||
} <span class='kw'>else</span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_class</span>(<span class='kw-2'>&</span>[<span class='ident'>ClassRange</span> { <span class='ident'>start</span>: <span class='ident'>c</span>, <span class='ident'>end</span>: <span class='ident'>c</span> }])
|
||
}
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_class</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>ranges</span>: <span class='kw-2'>&</span>[<span class='ident'>ClassRange</span>]) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>uses_bytes</span>() {
|
||
<span class='ident'>CompileClass</span> {
|
||
<span class='ident'>c</span>: <span class='self'>self</span>,
|
||
<span class='ident'>ranges</span>: <span class='ident'>ranges</span>,
|
||
}.<span class='ident'>compile</span>()
|
||
} <span class='kw'>else</span> {
|
||
<span class='kw'>let</span> <span class='ident'>ranges</span>: <span class='ident'>Vec</span><span class='op'><</span>(<span class='ident'>char</span>, <span class='ident'>char</span>)<span class='op'>></span> <span class='op'>=</span>
|
||
<span class='ident'>ranges</span>.<span class='ident'>iter</span>().<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>r</span><span class='op'>|</span> (<span class='ident'>r</span>.<span class='ident'>start</span>, <span class='ident'>r</span>.<span class='ident'>end</span>)).<span class='ident'>collect</span>();
|
||
<span class='kw'>let</span> <span class='ident'>hole</span> <span class='op'>=</span> <span class='kw'>if</span> <span class='ident'>ranges</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='number'>1</span> <span class='op'>&&</span> <span class='ident'>ranges</span>[<span class='number'>0</span>].<span class='number'>0</span> <span class='op'>==</span> <span class='ident'>ranges</span>[<span class='number'>0</span>].<span class='number'>1</span> {
|
||
<span class='self'>self</span>.<span class='ident'>push_hole</span>(<span class='ident'>InstHole</span>::<span class='ident'>Char</span> { <span class='ident'>c</span>: <span class='ident'>ranges</span>[<span class='number'>0</span>].<span class='number'>0</span> })
|
||
} <span class='kw'>else</span> {
|
||
<span class='self'>self</span>.<span class='ident'>push_hole</span>(<span class='ident'>InstHole</span>::<span class='ident'>Ranges</span> { <span class='ident'>ranges</span>: <span class='ident'>ranges</span> })
|
||
};
|
||
<span class='prelude-val'>Ok</span>(<span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>hole</span>, <span class='ident'>entry</span>: <span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>() <span class='op'>-</span> <span class='number'>1</span> })
|
||
}
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_bytes</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>bytes</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>], <span class='ident'>casei</span>: <span class='ident'>bool</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='macro'>debug_assert</span><span class='macro'>!</span>(<span class='op'>!</span><span class='ident'>bytes</span>.<span class='ident'>is_empty</span>());
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>bytes</span>: <span class='ident'>Box</span><span class='op'><</span><span class='ident'>Iterator</span><span class='op'><</span><span class='ident'>Item</span><span class='op'>=</span><span class='kw-2'>&</span><span class='ident'>u8</span><span class='op'>>></span> <span class='op'>=</span>
|
||
<span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>compiled</span>.<span class='ident'>is_reverse</span> {
|
||
<span class='ident'>Box</span>::<span class='ident'>new</span>(<span class='ident'>bytes</span>.<span class='ident'>iter</span>().<span class='ident'>rev</span>())
|
||
} <span class='kw'>else</span> {
|
||
<span class='ident'>Box</span>::<span class='ident'>new</span>(<span class='ident'>bytes</span>.<span class='ident'>iter</span>())
|
||
};
|
||
<span class='kw'>let</span> <span class='ident'>first</span> <span class='op'>=</span> <span class='op'>*</span><span class='ident'>bytes</span>.<span class='ident'>next</span>().<span class='ident'>expect</span>(<span class='string'>"non-empty literal"</span>);
|
||
<span class='kw'>let</span> <span class='ident'>Patch</span> { <span class='kw-2'>mut</span> <span class='ident'>hole</span>, <span class='ident'>entry</span> } <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c_byte</span>(<span class='ident'>first</span>, <span class='ident'>casei</span>));
|
||
<span class='kw'>for</span> <span class='kw-2'>&</span><span class='ident'>b</span> <span class='kw'>in</span> <span class='ident'>bytes</span> {
|
||
<span class='kw'>let</span> <span class='ident'>p</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c_byte</span>(<span class='ident'>b</span>, <span class='ident'>casei</span>));
|
||
<span class='self'>self</span>.<span class='ident'>fill</span>(<span class='ident'>hole</span>, <span class='ident'>p</span>.<span class='ident'>entry</span>);
|
||
<span class='ident'>hole</span> <span class='op'>=</span> <span class='ident'>p</span>.<span class='ident'>hole</span>;
|
||
}
|
||
<span class='prelude-val'>Ok</span>(<span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>hole</span>, <span class='ident'>entry</span>: <span class='ident'>entry</span> })
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_byte</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>b</span>: <span class='ident'>u8</span>, <span class='ident'>casei</span>: <span class='ident'>bool</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='kw'>if</span> <span class='ident'>casei</span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_class_bytes</span>(<span class='kw-2'>&</span><span class='ident'>ByteClass</span>::<span class='ident'>new</span>(<span class='macro'>vec</span><span class='macro'>!</span>[
|
||
<span class='ident'>ByteRange</span> { <span class='ident'>start</span>: <span class='ident'>b</span>, <span class='ident'>end</span>: <span class='ident'>b</span> },
|
||
]).<span class='ident'>case_fold</span>())
|
||
} <span class='kw'>else</span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_class_bytes</span>(<span class='kw-2'>&</span>[<span class='ident'>ByteRange</span> { <span class='ident'>start</span>: <span class='ident'>b</span>, <span class='ident'>end</span>: <span class='ident'>b</span> }])
|
||
}
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_class_bytes</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>ranges</span>: <span class='kw-2'>&</span>[<span class='ident'>ByteRange</span>]) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='macro'>debug_assert</span><span class='macro'>!</span>(<span class='op'>!</span><span class='ident'>ranges</span>.<span class='ident'>is_empty</span>());
|
||
|
||
<span class='kw'>let</span> <span class='ident'>first_split_entry</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>();
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>holes</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[];
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>prev_hole</span> <span class='op'>=</span> <span class='ident'>Hole</span>::<span class='prelude-val'>None</span>;
|
||
<span class='kw'>for</span> <span class='ident'>r</span> <span class='kw'>in</span> <span class='kw-2'>&</span><span class='ident'>ranges</span>[<span class='number'>0</span>..<span class='ident'>ranges</span>.<span class='ident'>len</span>() <span class='op'>-</span> <span class='number'>1</span>] {
|
||
<span class='self'>self</span>.<span class='ident'>fill_to_next</span>(<span class='ident'>prev_hole</span>);
|
||
<span class='kw'>let</span> <span class='ident'>split</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>push_split_hole</span>();
|
||
<span class='kw'>let</span> <span class='ident'>next</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>();
|
||
<span class='self'>self</span>.<span class='ident'>byte_classes</span>.<span class='ident'>set_range</span>(<span class='ident'>r</span>.<span class='ident'>start</span>, <span class='ident'>r</span>.<span class='ident'>end</span>);
|
||
<span class='ident'>holes</span>.<span class='ident'>push</span>(<span class='self'>self</span>.<span class='ident'>push_hole</span>(<span class='ident'>InstHole</span>::<span class='ident'>Bytes</span> {
|
||
<span class='ident'>start</span>: <span class='ident'>r</span>.<span class='ident'>start</span>, <span class='ident'>end</span>: <span class='ident'>r</span>.<span class='ident'>end</span>,
|
||
}));
|
||
<span class='ident'>prev_hole</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>fill_split</span>(<span class='ident'>split</span>, <span class='prelude-val'>Some</span>(<span class='ident'>next</span>), <span class='prelude-val'>None</span>);
|
||
}
|
||
<span class='kw'>let</span> <span class='ident'>next</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>();
|
||
<span class='kw'>let</span> <span class='ident'>r</span> <span class='op'>=</span> <span class='kw-2'>&</span><span class='ident'>ranges</span>[<span class='ident'>ranges</span>.<span class='ident'>len</span>() <span class='op'>-</span> <span class='number'>1</span>];
|
||
<span class='self'>self</span>.<span class='ident'>byte_classes</span>.<span class='ident'>set_range</span>(<span class='ident'>r</span>.<span class='ident'>start</span>, <span class='ident'>r</span>.<span class='ident'>end</span>);
|
||
<span class='ident'>holes</span>.<span class='ident'>push</span>(<span class='self'>self</span>.<span class='ident'>push_hole</span>(<span class='ident'>InstHole</span>::<span class='ident'>Bytes</span> {
|
||
<span class='ident'>start</span>: <span class='ident'>r</span>.<span class='ident'>start</span>, <span class='ident'>end</span>: <span class='ident'>r</span>.<span class='ident'>end</span>,
|
||
}));
|
||
<span class='self'>self</span>.<span class='ident'>fill</span>(<span class='ident'>prev_hole</span>, <span class='ident'>next</span>);
|
||
<span class='prelude-val'>Ok</span>(<span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>Hole</span>::<span class='ident'>Many</span>(<span class='ident'>holes</span>), <span class='ident'>entry</span>: <span class='ident'>first_split_entry</span> })
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_empty_look</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>look</span>: <span class='ident'>EmptyLook</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='kw'>let</span> <span class='ident'>hole</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>push_hole</span>(<span class='ident'>InstHole</span>::<span class='ident'>EmptyLook</span> { <span class='ident'>look</span>: <span class='ident'>look</span> });
|
||
<span class='prelude-val'>Ok</span>(<span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>hole</span>, <span class='ident'>entry</span>: <span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>() <span class='op'>-</span> <span class='number'>1</span> })
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_concat</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='ident'>I</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>exprs</span>: <span class='ident'>I</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span>
|
||
<span class='kw'>where</span> <span class='ident'>I</span>: <span class='ident'>IntoIterator</span><span class='op'><</span><span class='ident'>Item</span><span class='op'>=</span><span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='ident'>Expr</span><span class='op'>></span> {
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>exprs</span> <span class='op'>=</span> <span class='ident'>exprs</span>.<span class='ident'>into_iter</span>();
|
||
<span class='kw'>let</span> <span class='ident'>first</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='ident'>exprs</span>.<span class='ident'>next</span>() {
|
||
<span class='prelude-val'>Some</span>(<span class='ident'>expr</span>) <span class='op'>=></span> <span class='ident'>expr</span>,
|
||
<span class='prelude-val'>None</span> <span class='op'>=></span> {
|
||
<span class='kw'>return</span> <span class='prelude-val'>Ok</span>(<span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>Hole</span>::<span class='prelude-val'>None</span>, <span class='ident'>entry</span>: <span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>() })
|
||
}
|
||
};
|
||
<span class='kw'>let</span> <span class='ident'>Patch</span> { <span class='kw-2'>mut</span> <span class='ident'>hole</span>, <span class='ident'>entry</span> } <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c</span>(<span class='ident'>first</span>));
|
||
<span class='kw'>for</span> <span class='ident'>e</span> <span class='kw'>in</span> <span class='ident'>exprs</span> {
|
||
<span class='kw'>let</span> <span class='ident'>p</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c</span>(<span class='ident'>e</span>));
|
||
<span class='self'>self</span>.<span class='ident'>fill</span>(<span class='ident'>hole</span>, <span class='ident'>p</span>.<span class='ident'>entry</span>);
|
||
<span class='ident'>hole</span> <span class='op'>=</span> <span class='ident'>p</span>.<span class='ident'>hole</span>;
|
||
}
|
||
<span class='prelude-val'>Ok</span>(<span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>hole</span>, <span class='ident'>entry</span>: <span class='ident'>entry</span> })
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_alternate</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>exprs</span>: <span class='kw-2'>&</span>[<span class='ident'>Expr</span>]) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='macro'>debug_assert</span><span class='macro'>!</span>(
|
||
<span class='ident'>exprs</span>.<span class='ident'>len</span>() <span class='op'>>=</span> <span class='number'>2</span>, <span class='string'>"alternates must have at least 2 exprs"</span>);
|
||
|
||
<span class='comment'>// Initial entry point is always the first split.</span>
|
||
<span class='kw'>let</span> <span class='ident'>first_split_entry</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>();
|
||
|
||
<span class='comment'>// Save up all of the holes from each alternate. They will all get</span>
|
||
<span class='comment'>// patched to point to the same location.</span>
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>holes</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[];
|
||
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>prev_hole</span> <span class='op'>=</span> <span class='ident'>Hole</span>::<span class='prelude-val'>None</span>;
|
||
<span class='kw'>for</span> <span class='ident'>e</span> <span class='kw'>in</span> <span class='kw-2'>&</span><span class='ident'>exprs</span>[<span class='number'>0</span>..<span class='ident'>exprs</span>.<span class='ident'>len</span>() <span class='op'>-</span> <span class='number'>1</span>] {
|
||
<span class='self'>self</span>.<span class='ident'>fill_to_next</span>(<span class='ident'>prev_hole</span>);
|
||
<span class='kw'>let</span> <span class='ident'>split</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>push_split_hole</span>();
|
||
<span class='kw'>let</span> <span class='ident'>Patch</span> { <span class='ident'>hole</span>, <span class='ident'>entry</span> } <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c</span>(<span class='ident'>e</span>));
|
||
<span class='ident'>holes</span>.<span class='ident'>push</span>(<span class='ident'>hole</span>);
|
||
<span class='ident'>prev_hole</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>fill_split</span>(<span class='ident'>split</span>, <span class='prelude-val'>Some</span>(<span class='ident'>entry</span>), <span class='prelude-val'>None</span>);
|
||
}
|
||
<span class='kw'>let</span> <span class='ident'>Patch</span> { <span class='ident'>hole</span>, <span class='ident'>entry</span> } <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c</span>(<span class='kw-2'>&</span><span class='ident'>exprs</span>[<span class='ident'>exprs</span>.<span class='ident'>len</span>() <span class='op'>-</span> <span class='number'>1</span>]));
|
||
<span class='ident'>holes</span>.<span class='ident'>push</span>(<span class='ident'>hole</span>);
|
||
<span class='self'>self</span>.<span class='ident'>fill</span>(<span class='ident'>prev_hole</span>, <span class='ident'>entry</span>);
|
||
<span class='prelude-val'>Ok</span>(<span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>Hole</span>::<span class='ident'>Many</span>(<span class='ident'>holes</span>), <span class='ident'>entry</span>: <span class='ident'>first_split_entry</span> })
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_repeat</span>(
|
||
<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>,
|
||
<span class='ident'>expr</span>: <span class='kw-2'>&</span><span class='ident'>Expr</span>,
|
||
<span class='ident'>kind</span>: <span class='ident'>Repeater</span>,
|
||
<span class='ident'>greedy</span>: <span class='ident'>bool</span>,
|
||
) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='kw'>match</span> <span class='ident'>kind</span> {
|
||
<span class='ident'>Repeater</span>::<span class='ident'>ZeroOrOne</span> <span class='op'>=></span> <span class='self'>self</span>.<span class='ident'>c_repeat_zero_or_one</span>(<span class='ident'>expr</span>, <span class='ident'>greedy</span>),
|
||
<span class='ident'>Repeater</span>::<span class='ident'>ZeroOrMore</span> <span class='op'>=></span> <span class='self'>self</span>.<span class='ident'>c_repeat_zero_or_more</span>(<span class='ident'>expr</span>, <span class='ident'>greedy</span>),
|
||
<span class='ident'>Repeater</span>::<span class='ident'>OneOrMore</span> <span class='op'>=></span> <span class='self'>self</span>.<span class='ident'>c_repeat_one_or_more</span>(<span class='ident'>expr</span>, <span class='ident'>greedy</span>),
|
||
<span class='ident'>Repeater</span>::<span class='ident'>Range</span> { <span class='ident'>min</span>, <span class='ident'>max</span>: <span class='prelude-val'>None</span> } <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_repeat_range_min_or_more</span>(<span class='ident'>expr</span>, <span class='ident'>greedy</span>, <span class='ident'>min</span>)
|
||
}
|
||
<span class='ident'>Repeater</span>::<span class='ident'>Range</span> { <span class='ident'>min</span>, <span class='ident'>max</span>: <span class='prelude-val'>Some</span>(<span class='ident'>max</span>) } <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_repeat_range</span>(<span class='ident'>expr</span>, <span class='ident'>greedy</span>, <span class='ident'>min</span>, <span class='ident'>max</span>)
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_repeat_zero_or_one</span>(
|
||
<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>,
|
||
<span class='ident'>expr</span>: <span class='kw-2'>&</span><span class='ident'>Expr</span>,
|
||
<span class='ident'>greedy</span>: <span class='ident'>bool</span>,
|
||
) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='kw'>let</span> <span class='ident'>split_entry</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>();
|
||
<span class='kw'>let</span> <span class='ident'>split</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>push_split_hole</span>();
|
||
<span class='kw'>let</span> <span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>hole_rep</span>, <span class='ident'>entry</span>: <span class='ident'>entry_rep</span> } <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c</span>(<span class='ident'>expr</span>));
|
||
|
||
<span class='kw'>let</span> <span class='ident'>split_hole</span> <span class='op'>=</span> <span class='kw'>if</span> <span class='ident'>greedy</span> {
|
||
<span class='self'>self</span>.<span class='ident'>fill_split</span>(<span class='ident'>split</span>, <span class='prelude-val'>Some</span>(<span class='ident'>entry_rep</span>), <span class='prelude-val'>None</span>)
|
||
} <span class='kw'>else</span> {
|
||
<span class='self'>self</span>.<span class='ident'>fill_split</span>(<span class='ident'>split</span>, <span class='prelude-val'>None</span>, <span class='prelude-val'>Some</span>(<span class='ident'>entry_rep</span>))
|
||
};
|
||
<span class='kw'>let</span> <span class='ident'>holes</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[<span class='ident'>hole_rep</span>, <span class='ident'>split_hole</span>];
|
||
<span class='prelude-val'>Ok</span>(<span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>Hole</span>::<span class='ident'>Many</span>(<span class='ident'>holes</span>), <span class='ident'>entry</span>: <span class='ident'>split_entry</span> })
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_repeat_zero_or_more</span>(
|
||
<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>,
|
||
<span class='ident'>expr</span>: <span class='kw-2'>&</span><span class='ident'>Expr</span>,
|
||
<span class='ident'>greedy</span>: <span class='ident'>bool</span>,
|
||
) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='kw'>let</span> <span class='ident'>split_entry</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>();
|
||
<span class='kw'>let</span> <span class='ident'>split</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>push_split_hole</span>();
|
||
<span class='kw'>let</span> <span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>hole_rep</span>, <span class='ident'>entry</span>: <span class='ident'>entry_rep</span> } <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c</span>(<span class='ident'>expr</span>));
|
||
|
||
<span class='self'>self</span>.<span class='ident'>fill</span>(<span class='ident'>hole_rep</span>, <span class='ident'>split_entry</span>);
|
||
<span class='kw'>let</span> <span class='ident'>split_hole</span> <span class='op'>=</span> <span class='kw'>if</span> <span class='ident'>greedy</span> {
|
||
<span class='self'>self</span>.<span class='ident'>fill_split</span>(<span class='ident'>split</span>, <span class='prelude-val'>Some</span>(<span class='ident'>entry_rep</span>), <span class='prelude-val'>None</span>)
|
||
} <span class='kw'>else</span> {
|
||
<span class='self'>self</span>.<span class='ident'>fill_split</span>(<span class='ident'>split</span>, <span class='prelude-val'>None</span>, <span class='prelude-val'>Some</span>(<span class='ident'>entry_rep</span>))
|
||
};
|
||
<span class='prelude-val'>Ok</span>(<span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>split_hole</span>, <span class='ident'>entry</span>: <span class='ident'>split_entry</span> })
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_repeat_one_or_more</span>(
|
||
<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>,
|
||
<span class='ident'>expr</span>: <span class='kw-2'>&</span><span class='ident'>Expr</span>,
|
||
<span class='ident'>greedy</span>: <span class='ident'>bool</span>,
|
||
) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='kw'>let</span> <span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>hole_rep</span>, <span class='ident'>entry</span>: <span class='ident'>entry_rep</span> } <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c</span>(<span class='ident'>expr</span>));
|
||
<span class='self'>self</span>.<span class='ident'>fill_to_next</span>(<span class='ident'>hole_rep</span>);
|
||
<span class='kw'>let</span> <span class='ident'>split</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>push_split_hole</span>();
|
||
|
||
<span class='kw'>let</span> <span class='ident'>split_hole</span> <span class='op'>=</span> <span class='kw'>if</span> <span class='ident'>greedy</span> {
|
||
<span class='self'>self</span>.<span class='ident'>fill_split</span>(<span class='ident'>split</span>, <span class='prelude-val'>Some</span>(<span class='ident'>entry_rep</span>), <span class='prelude-val'>None</span>)
|
||
} <span class='kw'>else</span> {
|
||
<span class='self'>self</span>.<span class='ident'>fill_split</span>(<span class='ident'>split</span>, <span class='prelude-val'>None</span>, <span class='prelude-val'>Some</span>(<span class='ident'>entry_rep</span>))
|
||
};
|
||
<span class='prelude-val'>Ok</span>(<span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>split_hole</span>, <span class='ident'>entry</span>: <span class='ident'>entry_rep</span> })
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_repeat_range_min_or_more</span>(
|
||
<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>,
|
||
<span class='ident'>expr</span>: <span class='kw-2'>&</span><span class='ident'>Expr</span>,
|
||
<span class='ident'>greedy</span>: <span class='ident'>bool</span>,
|
||
<span class='ident'>min</span>: <span class='ident'>u32</span>,
|
||
) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='kw'>let</span> <span class='ident'>min</span> <span class='op'>=</span> <span class='ident'>u32_to_usize</span>(<span class='ident'>min</span>);
|
||
<span class='kw'>let</span> <span class='ident'>patch_concat</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c_concat</span>(<span class='ident'>iter</span>::<span class='ident'>repeat</span>(<span class='ident'>expr</span>).<span class='ident'>take</span>(<span class='ident'>min</span>)));
|
||
<span class='kw'>let</span> <span class='ident'>patch_rep</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c_repeat_zero_or_more</span>(<span class='ident'>expr</span>, <span class='ident'>greedy</span>));
|
||
<span class='self'>self</span>.<span class='ident'>fill</span>(<span class='ident'>patch_concat</span>.<span class='ident'>hole</span>, <span class='ident'>patch_rep</span>.<span class='ident'>entry</span>);
|
||
<span class='prelude-val'>Ok</span>(<span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>patch_rep</span>.<span class='ident'>hole</span>, <span class='ident'>entry</span>: <span class='ident'>patch_concat</span>.<span class='ident'>entry</span> })
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_repeat_range</span>(
|
||
<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>,
|
||
<span class='ident'>expr</span>: <span class='kw-2'>&</span><span class='ident'>Expr</span>,
|
||
<span class='ident'>greedy</span>: <span class='ident'>bool</span>,
|
||
<span class='ident'>min</span>: <span class='ident'>u32</span>,
|
||
<span class='ident'>max</span>: <span class='ident'>u32</span>,
|
||
) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='kw'>let</span> (<span class='ident'>min</span>, <span class='ident'>max</span>) <span class='op'>=</span> (<span class='ident'>u32_to_usize</span>(<span class='ident'>min</span>), <span class='ident'>u32_to_usize</span>(<span class='ident'>max</span>));
|
||
<span class='kw'>let</span> <span class='ident'>patch_concat</span> <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c_concat</span>(<span class='ident'>iter</span>::<span class='ident'>repeat</span>(<span class='ident'>expr</span>).<span class='ident'>take</span>(<span class='ident'>min</span>)));
|
||
<span class='kw'>let</span> <span class='ident'>initial_entry</span> <span class='op'>=</span> <span class='ident'>patch_concat</span>.<span class='ident'>entry</span>;
|
||
<span class='kw'>if</span> <span class='ident'>min</span> <span class='op'>==</span> <span class='ident'>max</span> {
|
||
<span class='kw'>return</span> <span class='prelude-val'>Ok</span>(<span class='ident'>patch_concat</span>);
|
||
}
|
||
<span class='comment'>// It is much simpler to compile, e.g., `a{2,5}` as:</span>
|
||
<span class='comment'>//</span>
|
||
<span class='comment'>// aaa?a?a?</span>
|
||
<span class='comment'>//</span>
|
||
<span class='comment'>// But you end up with a sequence of instructions like this:</span>
|
||
<span class='comment'>//</span>
|
||
<span class='comment'>// 0: 'a'</span>
|
||
<span class='comment'>// 1: 'a',</span>
|
||
<span class='comment'>// 2: split(3, 4)</span>
|
||
<span class='comment'>// 3: 'a'</span>
|
||
<span class='comment'>// 4: split(5, 6)</span>
|
||
<span class='comment'>// 5: 'a'</span>
|
||
<span class='comment'>// 6: split(7, 8)</span>
|
||
<span class='comment'>// 7: 'a'</span>
|
||
<span class='comment'>// 8: MATCH</span>
|
||
<span class='comment'>//</span>
|
||
<span class='comment'>// This is *incredibly* inefficient because the splits end</span>
|
||
<span class='comment'>// up forming a chain, which has to be resolved everything a</span>
|
||
<span class='comment'>// transition is followed.</span>
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>holes</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[];
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>prev_hole</span> <span class='op'>=</span> <span class='ident'>patch_concat</span>.<span class='ident'>hole</span>;
|
||
<span class='kw'>for</span> _ <span class='kw'>in</span> <span class='ident'>min</span>..<span class='ident'>max</span> {
|
||
<span class='self'>self</span>.<span class='ident'>fill_to_next</span>(<span class='ident'>prev_hole</span>);
|
||
<span class='kw'>let</span> <span class='ident'>split</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>push_split_hole</span>();
|
||
<span class='kw'>let</span> <span class='ident'>Patch</span> { <span class='ident'>hole</span>, <span class='ident'>entry</span> } <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c</span>(<span class='ident'>expr</span>));
|
||
<span class='ident'>prev_hole</span> <span class='op'>=</span> <span class='ident'>hole</span>;
|
||
<span class='kw'>if</span> <span class='ident'>greedy</span> {
|
||
<span class='ident'>holes</span>.<span class='ident'>push</span>(<span class='self'>self</span>.<span class='ident'>fill_split</span>(<span class='ident'>split</span>, <span class='prelude-val'>Some</span>(<span class='ident'>entry</span>), <span class='prelude-val'>None</span>));
|
||
} <span class='kw'>else</span> {
|
||
<span class='ident'>holes</span>.<span class='ident'>push</span>(<span class='self'>self</span>.<span class='ident'>fill_split</span>(<span class='ident'>split</span>, <span class='prelude-val'>None</span>, <span class='prelude-val'>Some</span>(<span class='ident'>entry</span>)));
|
||
}
|
||
}
|
||
<span class='ident'>holes</span>.<span class='ident'>push</span>(<span class='ident'>prev_hole</span>);
|
||
<span class='prelude-val'>Ok</span>(<span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>Hole</span>::<span class='ident'>Many</span>(<span class='ident'>holes</span>), <span class='ident'>entry</span>: <span class='ident'>initial_entry</span> })
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>fill</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>hole</span>: <span class='ident'>Hole</span>, <span class='ident'>goto</span>: <span class='ident'>InstPtr</span>) {
|
||
<span class='kw'>match</span> <span class='ident'>hole</span> {
|
||
<span class='ident'>Hole</span>::<span class='prelude-val'>None</span> <span class='op'>=></span> {}
|
||
<span class='ident'>Hole</span>::<span class='ident'>One</span>(<span class='ident'>pc</span>) <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>insts</span>[<span class='ident'>pc</span>].<span class='ident'>fill</span>(<span class='ident'>goto</span>);
|
||
}
|
||
<span class='ident'>Hole</span>::<span class='ident'>Many</span>(<span class='ident'>holes</span>) <span class='op'>=></span> {
|
||
<span class='kw'>for</span> <span class='ident'>hole</span> <span class='kw'>in</span> <span class='ident'>holes</span> {
|
||
<span class='self'>self</span>.<span class='ident'>fill</span>(<span class='ident'>hole</span>, <span class='ident'>goto</span>);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>fill_to_next</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>hole</span>: <span class='ident'>Hole</span>) {
|
||
<span class='kw'>let</span> <span class='ident'>next</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>();
|
||
<span class='self'>self</span>.<span class='ident'>fill</span>(<span class='ident'>hole</span>, <span class='ident'>next</span>);
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>fill_split</span>(
|
||
<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>,
|
||
<span class='ident'>hole</span>: <span class='ident'>Hole</span>,
|
||
<span class='ident'>goto1</span>: <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>InstPtr</span><span class='op'>></span>,
|
||
<span class='ident'>goto2</span>: <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>InstPtr</span><span class='op'>></span>,
|
||
) <span class='op'>-></span> <span class='ident'>Hole</span> {
|
||
<span class='kw'>match</span> <span class='ident'>hole</span> {
|
||
<span class='ident'>Hole</span>::<span class='prelude-val'>None</span> <span class='op'>=></span> <span class='ident'>Hole</span>::<span class='prelude-val'>None</span>,
|
||
<span class='ident'>Hole</span>::<span class='ident'>One</span>(<span class='ident'>pc</span>) <span class='op'>=></span> {
|
||
<span class='kw'>match</span> (<span class='ident'>goto1</span>, <span class='ident'>goto2</span>) {
|
||
(<span class='prelude-val'>Some</span>(<span class='ident'>goto1</span>), <span class='prelude-val'>Some</span>(<span class='ident'>goto2</span>)) <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>insts</span>[<span class='ident'>pc</span>].<span class='ident'>fill_split</span>(<span class='ident'>goto1</span>, <span class='ident'>goto2</span>);
|
||
<span class='ident'>Hole</span>::<span class='prelude-val'>None</span>
|
||
}
|
||
(<span class='prelude-val'>Some</span>(<span class='ident'>goto1</span>), <span class='prelude-val'>None</span>) <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>insts</span>[<span class='ident'>pc</span>].<span class='ident'>half_fill_split_goto1</span>(<span class='ident'>goto1</span>);
|
||
<span class='ident'>Hole</span>::<span class='ident'>One</span>(<span class='ident'>pc</span>)
|
||
}
|
||
(<span class='prelude-val'>None</span>, <span class='prelude-val'>Some</span>(<span class='ident'>goto2</span>)) <span class='op'>=></span> {
|
||
<span class='self'>self</span>.<span class='ident'>insts</span>[<span class='ident'>pc</span>].<span class='ident'>half_fill_split_goto2</span>(<span class='ident'>goto2</span>);
|
||
<span class='ident'>Hole</span>::<span class='ident'>One</span>(<span class='ident'>pc</span>)
|
||
}
|
||
(<span class='prelude-val'>None</span>, <span class='prelude-val'>None</span>) <span class='op'>=></span> <span class='macro'>unreachable</span><span class='macro'>!</span>(<span class='string'>"at least one of the split \
|
||
holes must be filled"</span>),
|
||
}
|
||
}
|
||
<span class='ident'>Hole</span>::<span class='ident'>Many</span>(<span class='ident'>holes</span>) <span class='op'>=></span> {
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>new_holes</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[];
|
||
<span class='kw'>for</span> <span class='ident'>hole</span> <span class='kw'>in</span> <span class='ident'>holes</span> {
|
||
<span class='ident'>new_holes</span>.<span class='ident'>push</span>(<span class='self'>self</span>.<span class='ident'>fill_split</span>(<span class='ident'>hole</span>, <span class='ident'>goto1</span>, <span class='ident'>goto2</span>));
|
||
}
|
||
<span class='kw'>if</span> <span class='ident'>new_holes</span>.<span class='ident'>is_empty</span>() {
|
||
<span class='ident'>Hole</span>::<span class='prelude-val'>None</span>
|
||
} <span class='kw'>else</span> <span class='kw'>if</span> <span class='ident'>new_holes</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='number'>1</span> {
|
||
<span class='ident'>new_holes</span>.<span class='ident'>pop</span>().<span class='ident'>unwrap</span>()
|
||
} <span class='kw'>else</span> {
|
||
<span class='ident'>Hole</span>::<span class='ident'>Many</span>(<span class='ident'>new_holes</span>)
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>push_compiled</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>inst</span>: <span class='ident'>Inst</span>) {
|
||
<span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>push</span>(<span class='ident'>MaybeInst</span>::<span class='ident'>Compiled</span>(<span class='ident'>inst</span>));
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>push_hole</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>inst</span>: <span class='ident'>InstHole</span>) <span class='op'>-></span> <span class='ident'>Hole</span> {
|
||
<span class='kw'>let</span> <span class='ident'>hole</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>();
|
||
<span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>push</span>(<span class='ident'>MaybeInst</span>::<span class='ident'>Uncompiled</span>(<span class='ident'>inst</span>));
|
||
<span class='ident'>Hole</span>::<span class='ident'>One</span>(<span class='ident'>hole</span>)
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>push_split_hole</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>Hole</span> {
|
||
<span class='kw'>let</span> <span class='ident'>hole</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>();
|
||
<span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>push</span>(<span class='ident'>MaybeInst</span>::<span class='ident'>Split</span>);
|
||
<span class='ident'>Hole</span>::<span class='ident'>One</span>(<span class='ident'>hole</span>)
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>check_size</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>result</span>::<span class='prelude-ty'>Result</span><span class='op'><</span>(), <span class='ident'>Error</span><span class='op'>></span> {
|
||
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>mem</span>::<span class='ident'>size_of</span>;
|
||
|
||
<span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>() <span class='op'>*</span> <span class='ident'>size_of</span>::<span class='op'><</span><span class='ident'>Inst</span><span class='op'>></span>() <span class='op'>></span> <span class='self'>self</span>.<span class='ident'>size_limit</span> {
|
||
<span class='prelude-val'>Err</span>(<span class='ident'>Error</span>::<span class='ident'>CompiledTooBig</span>(<span class='self'>self</span>.<span class='ident'>size_limit</span>))
|
||
} <span class='kw'>else</span> {
|
||
<span class='prelude-val'>Ok</span>(())
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Debug</span>)]</span>
|
||
<span class='kw'>enum</span> <span class='ident'>Hole</span> {
|
||
<span class='prelude-val'>None</span>,
|
||
<span class='ident'>One</span>(<span class='ident'>InstPtr</span>),
|
||
<span class='ident'>Many</span>(<span class='ident'>Vec</span><span class='op'><</span><span class='ident'>Hole</span><span class='op'>></span>),
|
||
}
|
||
|
||
<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>, <span class='ident'>Debug</span>)]</span>
|
||
<span class='kw'>enum</span> <span class='ident'>MaybeInst</span> {
|
||
<span class='ident'>Compiled</span>(<span class='ident'>Inst</span>),
|
||
<span class='ident'>Uncompiled</span>(<span class='ident'>InstHole</span>),
|
||
<span class='ident'>Split</span>,
|
||
<span class='ident'>Split1</span>(<span class='ident'>InstPtr</span>),
|
||
<span class='ident'>Split2</span>(<span class='ident'>InstPtr</span>),
|
||
}
|
||
|
||
<span class='kw'>impl</span> <span class='ident'>MaybeInst</span> {
|
||
<span class='kw'>fn</span> <span class='ident'>fill</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>goto</span>: <span class='ident'>InstPtr</span>) {
|
||
<span class='kw'>let</span> <span class='ident'>filled</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='op'>*</span><span class='self'>self</span> {
|
||
<span class='ident'>MaybeInst</span>::<span class='ident'>Uncompiled</span>(<span class='kw-2'>ref</span> <span class='ident'>inst</span>) <span class='op'>=></span> <span class='ident'>inst</span>.<span class='ident'>fill</span>(<span class='ident'>goto</span>),
|
||
<span class='ident'>MaybeInst</span>::<span class='ident'>Split1</span>(<span class='ident'>goto1</span>) <span class='op'>=></span> {
|
||
<span class='ident'>Inst</span>::<span class='ident'>Split</span>(<span class='ident'>InstSplit</span> { <span class='ident'>goto1</span>: <span class='ident'>goto1</span>, <span class='ident'>goto2</span>: <span class='ident'>goto</span> })
|
||
}
|
||
<span class='ident'>MaybeInst</span>::<span class='ident'>Split2</span>(<span class='ident'>goto2</span>) <span class='op'>=></span> {
|
||
<span class='ident'>Inst</span>::<span class='ident'>Split</span>(<span class='ident'>InstSplit</span> { <span class='ident'>goto1</span>: <span class='ident'>goto</span>, <span class='ident'>goto2</span>: <span class='ident'>goto2</span> })
|
||
}
|
||
_ <span class='op'>=></span> <span class='macro'>unreachable</span><span class='macro'>!</span>(<span class='string'>"not all instructions were compiled! \
|
||
found uncompiled instruction: {:?}"</span>, <span class='self'>self</span>),
|
||
};
|
||
<span class='op'>*</span><span class='self'>self</span> <span class='op'>=</span> <span class='ident'>MaybeInst</span>::<span class='ident'>Compiled</span>(<span class='ident'>filled</span>);
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>fill_split</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>goto1</span>: <span class='ident'>InstPtr</span>, <span class='ident'>goto2</span>: <span class='ident'>InstPtr</span>) {
|
||
<span class='kw'>let</span> <span class='ident'>filled</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='op'>*</span><span class='self'>self</span> {
|
||
<span class='ident'>MaybeInst</span>::<span class='ident'>Split</span> <span class='op'>=></span> {
|
||
<span class='ident'>Inst</span>::<span class='ident'>Split</span>(<span class='ident'>InstSplit</span> { <span class='ident'>goto1</span>: <span class='ident'>goto1</span>, <span class='ident'>goto2</span>: <span class='ident'>goto2</span> })
|
||
}
|
||
_ <span class='op'>=></span> <span class='macro'>unreachable</span><span class='macro'>!</span>(<span class='string'>"must be called on Split instruction, \
|
||
instead it was called on: {:?}"</span>, <span class='self'>self</span>),
|
||
};
|
||
<span class='op'>*</span><span class='self'>self</span> <span class='op'>=</span> <span class='ident'>MaybeInst</span>::<span class='ident'>Compiled</span>(<span class='ident'>filled</span>);
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>half_fill_split_goto1</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>goto1</span>: <span class='ident'>InstPtr</span>) {
|
||
<span class='kw'>let</span> <span class='ident'>half_filled</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='op'>*</span><span class='self'>self</span> {
|
||
<span class='ident'>MaybeInst</span>::<span class='ident'>Split</span> <span class='op'>=></span> <span class='ident'>goto1</span>,
|
||
_ <span class='op'>=></span> <span class='macro'>unreachable</span><span class='macro'>!</span>(<span class='string'>"must be called on Split instruction, \
|
||
instead it was called on: {:?}"</span>, <span class='self'>self</span>),
|
||
};
|
||
<span class='op'>*</span><span class='self'>self</span> <span class='op'>=</span> <span class='ident'>MaybeInst</span>::<span class='ident'>Split1</span>(<span class='ident'>half_filled</span>);
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>half_fill_split_goto2</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>goto2</span>: <span class='ident'>InstPtr</span>) {
|
||
<span class='kw'>let</span> <span class='ident'>half_filled</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='op'>*</span><span class='self'>self</span> {
|
||
<span class='ident'>MaybeInst</span>::<span class='ident'>Split</span> <span class='op'>=></span> <span class='ident'>goto2</span>,
|
||
_ <span class='op'>=></span> <span class='macro'>unreachable</span><span class='macro'>!</span>(<span class='string'>"must be called on Split instruction, \
|
||
instead it was called on: {:?}"</span>, <span class='self'>self</span>),
|
||
};
|
||
<span class='op'>*</span><span class='self'>self</span> <span class='op'>=</span> <span class='ident'>MaybeInst</span>::<span class='ident'>Split2</span>(<span class='ident'>half_filled</span>);
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>unwrap</span>(<span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>Inst</span> {
|
||
<span class='kw'>match</span> <span class='self'>self</span> {
|
||
<span class='ident'>MaybeInst</span>::<span class='ident'>Compiled</span>(<span class='ident'>inst</span>) <span class='op'>=></span> <span class='ident'>inst</span>,
|
||
_ <span class='op'>=></span> <span class='macro'>unreachable</span><span class='macro'>!</span>(<span class='string'>"must be called on a compiled instruction, \
|
||
instead it was called on: {:?}"</span>, <span class='self'>self</span>),
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>, <span class='ident'>Debug</span>)]</span>
|
||
<span class='kw'>enum</span> <span class='ident'>InstHole</span> {
|
||
<span class='ident'>Save</span> { <span class='ident'>slot</span>: <span class='ident'>usize</span> },
|
||
<span class='ident'>EmptyLook</span> { <span class='ident'>look</span>: <span class='ident'>EmptyLook</span> },
|
||
<span class='ident'>Char</span> { <span class='ident'>c</span>: <span class='ident'>char</span> },
|
||
<span class='ident'>Ranges</span> { <span class='ident'>ranges</span>: <span class='ident'>Vec</span><span class='op'><</span>(<span class='ident'>char</span>, <span class='ident'>char</span>)<span class='op'>></span> },
|
||
<span class='ident'>Bytes</span> { <span class='ident'>start</span>: <span class='ident'>u8</span>, <span class='ident'>end</span>: <span class='ident'>u8</span> },
|
||
}
|
||
|
||
<span class='kw'>impl</span> <span class='ident'>InstHole</span> {
|
||
<span class='kw'>fn</span> <span class='ident'>fill</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>goto</span>: <span class='ident'>InstPtr</span>) <span class='op'>-></span> <span class='ident'>Inst</span> {
|
||
<span class='kw'>match</span> <span class='op'>*</span><span class='self'>self</span> {
|
||
<span class='ident'>InstHole</span>::<span class='ident'>Save</span> { <span class='ident'>slot</span> } <span class='op'>=></span> <span class='ident'>Inst</span>::<span class='ident'>Save</span>(<span class='ident'>InstSave</span> {
|
||
<span class='ident'>goto</span>: <span class='ident'>goto</span>,
|
||
<span class='ident'>slot</span>: <span class='ident'>slot</span>,
|
||
}),
|
||
<span class='ident'>InstHole</span>::<span class='ident'>EmptyLook</span> { <span class='ident'>look</span> } <span class='op'>=></span> <span class='ident'>Inst</span>::<span class='ident'>EmptyLook</span>(<span class='ident'>InstEmptyLook</span> {
|
||
<span class='ident'>goto</span>: <span class='ident'>goto</span>,
|
||
<span class='ident'>look</span>: <span class='ident'>look</span>,
|
||
}),
|
||
<span class='ident'>InstHole</span>::<span class='ident'>Char</span> { <span class='ident'>c</span> } <span class='op'>=></span> <span class='ident'>Inst</span>::<span class='ident'>Char</span>(<span class='ident'>InstChar</span> {
|
||
<span class='ident'>goto</span>: <span class='ident'>goto</span>,
|
||
<span class='ident'>c</span>: <span class='ident'>c</span>,
|
||
}),
|
||
<span class='ident'>InstHole</span>::<span class='ident'>Ranges</span> { <span class='kw-2'>ref</span> <span class='ident'>ranges</span> } <span class='op'>=></span> <span class='ident'>Inst</span>::<span class='ident'>Ranges</span>(<span class='ident'>InstRanges</span> {
|
||
<span class='ident'>goto</span>: <span class='ident'>goto</span>,
|
||
<span class='ident'>ranges</span>: <span class='ident'>ranges</span>.<span class='ident'>clone</span>(),
|
||
}),
|
||
<span class='ident'>InstHole</span>::<span class='ident'>Bytes</span> { <span class='ident'>start</span>, <span class='ident'>end</span> } <span class='op'>=></span> <span class='ident'>Inst</span>::<span class='ident'>Bytes</span>(<span class='ident'>InstBytes</span> {
|
||
<span class='ident'>goto</span>: <span class='ident'>goto</span>,
|
||
<span class='ident'>start</span>: <span class='ident'>start</span>,
|
||
<span class='ident'>end</span>: <span class='ident'>end</span>,
|
||
}),
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class='kw'>struct</span> <span class='ident'>CompileClass</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='lifetime'>'b</span><span class='op'>></span> {
|
||
<span class='ident'>c</span>: <span class='kw-2'>&</span><span class='lifetime'>'a</span> <span class='kw-2'>mut</span> <span class='ident'>Compiler</span>,
|
||
<span class='ident'>ranges</span>: <span class='kw-2'>&</span><span class='lifetime'>'b</span> [<span class='ident'>ClassRange</span>],
|
||
}
|
||
|
||
<span class='kw'>impl</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='lifetime'>'b</span><span class='op'>></span> <span class='ident'>CompileClass</span><span class='op'><</span><span class='lifetime'>'a</span>, <span class='lifetime'>'b</span><span class='op'>></span> {
|
||
<span class='kw'>fn</span> <span class='ident'>compile</span>(<span class='kw-2'>mut</span> <span class='self'>self</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>holes</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[];
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>initial_entry</span> <span class='op'>=</span> <span class='prelude-val'>None</span>;
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>last_split</span> <span class='op'>=</span> <span class='ident'>Hole</span>::<span class='prelude-val'>None</span>;
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>utf8_seqs</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>c</span>.<span class='ident'>utf8_seqs</span>.<span class='ident'>take</span>().<span class='ident'>unwrap</span>();
|
||
<span class='self'>self</span>.<span class='ident'>c</span>.<span class='ident'>suffix_cache</span>.<span class='ident'>clear</span>();
|
||
|
||
<span class='kw'>for</span> (<span class='ident'>i</span>, <span class='kw-2'>ref</span> <span class='ident'>range</span>) <span class='kw'>in</span> <span class='self'>self</span>.<span class='ident'>ranges</span>.<span class='ident'>iter</span>().<span class='ident'>enumerate</span>() {
|
||
<span class='kw'>let</span> <span class='ident'>is_last_range</span> <span class='op'>=</span> <span class='ident'>i</span> <span class='op'>+</span> <span class='number'>1</span> <span class='op'>==</span> <span class='self'>self</span>.<span class='ident'>ranges</span>.<span class='ident'>len</span>();
|
||
<span class='ident'>utf8_seqs</span>.<span class='ident'>reset</span>(<span class='ident'>range</span>.<span class='ident'>start</span>, <span class='ident'>range</span>.<span class='ident'>end</span>);
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>it</span> <span class='op'>=</span> (<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='ident'>utf8_seqs</span>).<span class='ident'>peekable</span>();
|
||
<span class='kw'>loop</span> {
|
||
<span class='kw'>let</span> <span class='ident'>utf8_seq</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='ident'>it</span>.<span class='ident'>next</span>() {
|
||
<span class='prelude-val'>None</span> <span class='op'>=></span> <span class='kw'>break</span>,
|
||
<span class='prelude-val'>Some</span>(<span class='ident'>utf8_seq</span>) <span class='op'>=></span> <span class='ident'>utf8_seq</span>,
|
||
};
|
||
<span class='kw'>if</span> <span class='ident'>is_last_range</span> <span class='op'>&&</span> <span class='ident'>it</span>.<span class='ident'>peek</span>().<span class='ident'>is_none</span>() {
|
||
<span class='kw'>let</span> <span class='ident'>Patch</span> { <span class='ident'>hole</span>, <span class='ident'>entry</span> } <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c_utf8_seq</span>(<span class='kw-2'>&</span><span class='ident'>utf8_seq</span>));
|
||
<span class='ident'>holes</span>.<span class='ident'>push</span>(<span class='ident'>hole</span>);
|
||
<span class='self'>self</span>.<span class='ident'>c</span>.<span class='ident'>fill</span>(<span class='ident'>last_split</span>, <span class='ident'>entry</span>);
|
||
<span class='ident'>last_split</span> <span class='op'>=</span> <span class='ident'>Hole</span>::<span class='prelude-val'>None</span>;
|
||
<span class='kw'>if</span> <span class='ident'>initial_entry</span>.<span class='ident'>is_none</span>() {
|
||
<span class='ident'>initial_entry</span> <span class='op'>=</span> <span class='prelude-val'>Some</span>(<span class='ident'>entry</span>);
|
||
}
|
||
} <span class='kw'>else</span> {
|
||
<span class='kw'>if</span> <span class='ident'>initial_entry</span>.<span class='ident'>is_none</span>() {
|
||
<span class='ident'>initial_entry</span> <span class='op'>=</span> <span class='prelude-val'>Some</span>(<span class='self'>self</span>.<span class='ident'>c</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>());
|
||
}
|
||
<span class='self'>self</span>.<span class='ident'>c</span>.<span class='ident'>fill_to_next</span>(<span class='ident'>last_split</span>);
|
||
<span class='ident'>last_split</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>c</span>.<span class='ident'>push_split_hole</span>();
|
||
<span class='kw'>let</span> <span class='ident'>Patch</span> { <span class='ident'>hole</span>, <span class='ident'>entry</span> } <span class='op'>=</span> <span class='macro'>try</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>c_utf8_seq</span>(<span class='kw-2'>&</span><span class='ident'>utf8_seq</span>));
|
||
<span class='ident'>holes</span>.<span class='ident'>push</span>(<span class='ident'>hole</span>);
|
||
<span class='ident'>last_split</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>c</span>.<span class='ident'>fill_split</span>(<span class='ident'>last_split</span>, <span class='prelude-val'>Some</span>(<span class='ident'>entry</span>), <span class='prelude-val'>None</span>);
|
||
}
|
||
}
|
||
}
|
||
<span class='self'>self</span>.<span class='ident'>c</span>.<span class='ident'>utf8_seqs</span> <span class='op'>=</span> <span class='prelude-val'>Some</span>(<span class='ident'>utf8_seqs</span>);
|
||
<span class='prelude-val'>Ok</span>(<span class='ident'>Patch</span> {
|
||
<span class='ident'>hole</span>: <span class='ident'>Hole</span>::<span class='ident'>Many</span>(<span class='ident'>holes</span>),
|
||
<span class='ident'>entry</span>: <span class='ident'>initial_entry</span>.<span class='ident'>unwrap</span>(),
|
||
})
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_utf8_seq</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>seq</span>: <span class='kw-2'>&</span><span class='ident'>Utf8Sequence</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span> {
|
||
<span class='kw'>if</span> <span class='self'>self</span>.<span class='ident'>c</span>.<span class='ident'>compiled</span>.<span class='ident'>is_reverse</span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_utf8_seq_</span>(<span class='ident'>seq</span>)
|
||
} <span class='kw'>else</span> {
|
||
<span class='self'>self</span>.<span class='ident'>c_utf8_seq_</span>(<span class='ident'>seq</span>.<span class='ident'>into_iter</span>().<span class='ident'>rev</span>())
|
||
}
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>c_utf8_seq_</span><span class='op'><</span><span class='lifetime'>'r</span>, <span class='ident'>I</span><span class='op'>></span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>seq</span>: <span class='ident'>I</span>) <span class='op'>-></span> <span class='prelude-ty'>Result</span>
|
||
<span class='kw'>where</span> <span class='ident'>I</span>: <span class='ident'>IntoIterator</span><span class='op'><</span><span class='ident'>Item</span><span class='op'>=</span><span class='kw-2'>&</span><span class='lifetime'>'r</span> <span class='ident'>Utf8Range</span><span class='op'>></span> {
|
||
<span class='comment'>// The initial instruction for each UTF-8 sequence should be the same.</span>
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>from_inst</span> <span class='op'>=</span> ::<span class='ident'>std</span>::<span class='ident'>usize</span>::<span class='ident'>MAX</span>;
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>last_hole</span> <span class='op'>=</span> <span class='ident'>Hole</span>::<span class='prelude-val'>None</span>;
|
||
<span class='kw'>for</span> <span class='ident'>byte_range</span> <span class='kw'>in</span> <span class='ident'>seq</span> {
|
||
<span class='kw'>let</span> <span class='ident'>key</span> <span class='op'>=</span> <span class='ident'>SuffixCacheKey</span> {
|
||
<span class='ident'>from_inst</span>: <span class='ident'>from_inst</span>,
|
||
<span class='ident'>start</span>: <span class='ident'>byte_range</span>.<span class='ident'>start</span>,
|
||
<span class='ident'>end</span>: <span class='ident'>byte_range</span>.<span class='ident'>end</span>,
|
||
};
|
||
{
|
||
<span class='kw'>let</span> <span class='ident'>pc</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>c</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>();
|
||
<span class='kw'>if</span> <span class='kw'>let</span> <span class='prelude-val'>Some</span>(<span class='ident'>cached_pc</span>) <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>c</span>.<span class='ident'>suffix_cache</span>.<span class='ident'>get</span>(<span class='ident'>key</span>, <span class='ident'>pc</span>) {
|
||
<span class='ident'>from_inst</span> <span class='op'>=</span> <span class='ident'>cached_pc</span>;
|
||
<span class='kw'>continue</span>;
|
||
}
|
||
}
|
||
<span class='self'>self</span>.<span class='ident'>c</span>.<span class='ident'>byte_classes</span>.<span class='ident'>set_range</span>(<span class='ident'>byte_range</span>.<span class='ident'>start</span>, <span class='ident'>byte_range</span>.<span class='ident'>end</span>);
|
||
<span class='kw'>if</span> <span class='ident'>from_inst</span> <span class='op'>==</span> ::<span class='ident'>std</span>::<span class='ident'>usize</span>::<span class='ident'>MAX</span> {
|
||
<span class='ident'>last_hole</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>c</span>.<span class='ident'>push_hole</span>(<span class='ident'>InstHole</span>::<span class='ident'>Bytes</span> {
|
||
<span class='ident'>start</span>: <span class='ident'>byte_range</span>.<span class='ident'>start</span>,
|
||
<span class='ident'>end</span>: <span class='ident'>byte_range</span>.<span class='ident'>end</span>,
|
||
});
|
||
} <span class='kw'>else</span> {
|
||
<span class='self'>self</span>.<span class='ident'>c</span>.<span class='ident'>push_compiled</span>(<span class='ident'>Inst</span>::<span class='ident'>Bytes</span>(<span class='ident'>InstBytes</span> {
|
||
<span class='ident'>goto</span>: <span class='ident'>from_inst</span>,
|
||
<span class='ident'>start</span>: <span class='ident'>byte_range</span>.<span class='ident'>start</span>,
|
||
<span class='ident'>end</span>: <span class='ident'>byte_range</span>.<span class='ident'>end</span>,
|
||
}));
|
||
}
|
||
<span class='ident'>from_inst</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>c</span>.<span class='ident'>insts</span>.<span class='ident'>len</span>().<span class='ident'>checked_sub</span>(<span class='number'>1</span>).<span class='ident'>unwrap</span>();
|
||
<span class='macro'>debug_assert</span><span class='macro'>!</span>(<span class='ident'>from_inst</span> <span class='op'><</span> ::<span class='ident'>std</span>::<span class='ident'>usize</span>::<span class='ident'>MAX</span>);
|
||
}
|
||
<span class='macro'>debug_assert</span><span class='macro'>!</span>(<span class='ident'>from_inst</span> <span class='op'><</span> ::<span class='ident'>std</span>::<span class='ident'>usize</span>::<span class='ident'>MAX</span>);
|
||
<span class='prelude-val'>Ok</span>(<span class='ident'>Patch</span> { <span class='ident'>hole</span>: <span class='ident'>last_hole</span>, <span class='ident'>entry</span>: <span class='ident'>from_inst</span> })
|
||
}
|
||
}
|
||
|
||
<span class='doccomment'>/// SuffixCache is a simple bounded hash map for caching suffix entries in</span>
|
||
<span class='doccomment'>/// UTF-8 automata. For example, consider the Unicode range \u{0}-\u{FFFF}.</span>
|
||
<span class='doccomment'>/// The set of byte ranges looks like this:</span>
|
||
<span class='doccomment'>///</span>
|
||
<span class='doccomment'>/// [0-7F]</span>
|
||
<span class='doccomment'>/// [C2-DF][80-BF]</span>
|
||
<span class='doccomment'>/// [E0][A0-BF][80-BF]</span>
|
||
<span class='doccomment'>/// [E1-EC][80-BF][80-BF]</span>
|
||
<span class='doccomment'>/// [ED][80-9F][80-BF]</span>
|
||
<span class='doccomment'>/// [EE-EF][80-BF][80-BF]</span>
|
||
<span class='doccomment'>///</span>
|
||
<span class='doccomment'>/// Each line above translates to one alternate in the compiled regex program.</span>
|
||
<span class='doccomment'>/// However, all but one of the alternates end in the same suffix, which is</span>
|
||
<span class='doccomment'>/// a waste of an instruction. The suffix cache facilitates reusing them across</span>
|
||
<span class='doccomment'>/// alternates.</span>
|
||
<span class='doccomment'>///</span>
|
||
<span class='doccomment'>/// Note that a HashMap could be trivially used for this, but we don't need its</span>
|
||
<span class='doccomment'>/// overhead. Some small bounded space (LRU style) is more than enough.</span>
|
||
<span class='kw'>struct</span> <span class='ident'>SuffixCache</span> {
|
||
<span class='ident'>table</span>: <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>SuffixCacheEntry</span><span class='op'>></span>,
|
||
<span class='comment'>// Every time the cache is cleared, we increment the version number instead</span>
|
||
<span class='comment'>// of actually zeroing memory. Since we store a copy of the current version</span>
|
||
<span class='comment'>// in every element, all we need to do is make sure to invalidate any stale</span>
|
||
<span class='comment'>// entries upon access. This saves quite a bit of time!</span>
|
||
<span class='ident'>version</span>: <span class='ident'>usize</span>,
|
||
}
|
||
|
||
<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>, <span class='ident'>Copy</span>, <span class='ident'>Debug</span>, <span class='ident'>Default</span>, <span class='ident'>Eq</span>, <span class='ident'>Hash</span>, <span class='ident'>PartialEq</span>)]</span>
|
||
<span class='kw'>struct</span> <span class='ident'>SuffixCacheEntry</span> {
|
||
<span class='ident'>key</span>: <span class='ident'>SuffixCacheKey</span>,
|
||
<span class='ident'>pc</span>: <span class='ident'>InstPtr</span>,
|
||
<span class='ident'>version</span>: <span class='ident'>usize</span>,
|
||
}
|
||
|
||
<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>, <span class='ident'>Copy</span>, <span class='ident'>Debug</span>, <span class='ident'>Default</span>, <span class='ident'>Eq</span>, <span class='ident'>Hash</span>, <span class='ident'>PartialEq</span>)]</span>
|
||
<span class='kw'>struct</span> <span class='ident'>SuffixCacheKey</span> {
|
||
<span class='ident'>from_inst</span>: <span class='ident'>InstPtr</span>,
|
||
<span class='ident'>start</span>: <span class='ident'>u8</span>,
|
||
<span class='ident'>end</span>: <span class='ident'>u8</span>,
|
||
}
|
||
|
||
<span class='kw'>impl</span> <span class='ident'>SuffixCache</span> {
|
||
<span class='kw'>fn</span> <span class='ident'>new</span>(<span class='ident'>size</span>: <span class='ident'>usize</span>) <span class='op'>-></span> <span class='kw'>Self</span> {
|
||
<span class='ident'>SuffixCache</span> {
|
||
<span class='ident'>table</span>: <span class='macro'>vec</span><span class='macro'>!</span>[<span class='ident'>SuffixCacheEntry</span>::<span class='ident'>default</span>(); <span class='ident'>size</span>],
|
||
<span class='ident'>version</span>: <span class='number'>0</span>,
|
||
}
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>get</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>key</span>: <span class='ident'>SuffixCacheKey</span>, <span class='ident'>pc</span>: <span class='ident'>InstPtr</span>) <span class='op'>-></span> <span class='prelude-ty'>Option</span><span class='op'><</span><span class='ident'>InstPtr</span><span class='op'>></span> {
|
||
<span class='kw'>let</span> <span class='ident'>h</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>hash</span>(<span class='kw-2'>&</span><span class='ident'>key</span>);
|
||
<span class='kw'>let</span> <span class='ident'>e</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>table</span>[<span class='ident'>h</span>];
|
||
<span class='kw'>if</span> <span class='ident'>e</span>.<span class='ident'>key</span> <span class='op'>==</span> <span class='ident'>key</span> <span class='op'>&&</span> <span class='ident'>e</span>.<span class='ident'>version</span> <span class='op'>==</span> <span class='self'>self</span>.<span class='ident'>version</span> {
|
||
<span class='prelude-val'>Some</span>(<span class='ident'>e</span>.<span class='ident'>pc</span>)
|
||
} <span class='kw'>else</span> {
|
||
<span class='self'>self</span>.<span class='ident'>table</span>[<span class='ident'>h</span>] <span class='op'>=</span> <span class='ident'>SuffixCacheEntry</span> {
|
||
<span class='ident'>key</span>: <span class='ident'>key</span>,
|
||
<span class='ident'>pc</span>: <span class='ident'>pc</span>,
|
||
<span class='ident'>version</span>: <span class='self'>self</span>.<span class='ident'>version</span>,
|
||
};
|
||
<span class='prelude-val'>None</span>
|
||
}
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>clear</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) {
|
||
<span class='self'>self</span>.<span class='ident'>version</span> <span class='op'>+=</span> <span class='number'>1</span>;
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>hash</span>(<span class='kw-2'>&</span><span class='self'>self</span>, <span class='ident'>suffix</span>: <span class='kw-2'>&</span><span class='ident'>SuffixCacheKey</span>) <span class='op'>-></span> <span class='ident'>usize</span> {
|
||
<span class='comment'>// Basic FNV-1a hash as described:</span>
|
||
<span class='comment'>// https://en.wikipedia.org/wiki/Fowler%E2%80%93Noll%E2%80%93Vo_hash_function</span>
|
||
<span class='kw'>const</span> <span class='ident'>FNV_PRIME</span>: <span class='ident'>u64</span> <span class='op'>=</span> <span class='number'>1099511628211</span>;
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>h</span> <span class='op'>=</span> <span class='number'>14695981039346656037</span>;
|
||
<span class='ident'>h</span> <span class='op'>=</span> (<span class='ident'>h</span> <span class='op'>^</span> (<span class='ident'>suffix</span>.<span class='ident'>from_inst</span> <span class='kw'>as</span> <span class='ident'>u64</span>)).<span class='ident'>wrapping_mul</span>(<span class='ident'>FNV_PRIME</span>);
|
||
<span class='ident'>h</span> <span class='op'>=</span> (<span class='ident'>h</span> <span class='op'>^</span> (<span class='ident'>suffix</span>.<span class='ident'>start</span> <span class='kw'>as</span> <span class='ident'>u64</span>)).<span class='ident'>wrapping_mul</span>(<span class='ident'>FNV_PRIME</span>);
|
||
<span class='ident'>h</span> <span class='op'>=</span> (<span class='ident'>h</span> <span class='op'>^</span> (<span class='ident'>suffix</span>.<span class='ident'>end</span> <span class='kw'>as</span> <span class='ident'>u64</span>)).<span class='ident'>wrapping_mul</span>(<span class='ident'>FNV_PRIME</span>);
|
||
(<span class='ident'>h</span> <span class='kw'>as</span> <span class='ident'>usize</span>) <span class='op'>%</span> <span class='self'>self</span>.<span class='ident'>table</span>.<span class='ident'>len</span>()
|
||
}
|
||
}
|
||
|
||
<span class='kw'>struct</span> <span class='ident'>ByteClassSet</span>([<span class='ident'>bool</span>; <span class='number'>256</span>]);
|
||
|
||
<span class='kw'>impl</span> <span class='ident'>ByteClassSet</span> {
|
||
<span class='kw'>fn</span> <span class='ident'>new</span>() <span class='op'>-></span> <span class='kw'>Self</span> {
|
||
<span class='ident'>ByteClassSet</span>([<span class='boolval'>false</span>; <span class='number'>256</span>])
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>set_range</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>start</span>: <span class='ident'>u8</span>, <span class='ident'>end</span>: <span class='ident'>u8</span>) {
|
||
<span class='macro'>debug_assert</span><span class='macro'>!</span>(<span class='ident'>start</span> <span class='op'><=</span> <span class='ident'>end</span>);
|
||
<span class='kw'>if</span> <span class='ident'>start</span> <span class='op'>></span> <span class='number'>0</span> {
|
||
<span class='self'>self</span>.<span class='number'>0</span>[<span class='ident'>start</span> <span class='kw'>as</span> <span class='ident'>usize</span> <span class='op'>-</span> <span class='number'>1</span>] <span class='op'>=</span> <span class='boolval'>true</span>;
|
||
}
|
||
<span class='self'>self</span>.<span class='number'>0</span>[<span class='ident'>end</span> <span class='kw'>as</span> <span class='ident'>usize</span>] <span class='op'>=</span> <span class='boolval'>true</span>;
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>byte_classes</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>Vec</span><span class='op'><</span><span class='ident'>u8</span><span class='op'>></span> {
|
||
<span class='comment'>// N.B. If you're debugging the DFA, it's useful to simply return</span>
|
||
<span class='comment'>// `(0..256).collect()`, which effectively removes the byte classes</span>
|
||
<span class='comment'>// and makes the transitions easier to read.</span>
|
||
<span class='comment'>// return (0..256).collect();</span>
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>byte_classes</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[<span class='number'>0</span>; <span class='number'>256</span>];
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>class</span> <span class='op'>=</span> <span class='number'>0u8</span>;
|
||
<span class='kw'>for</span> <span class='ident'>i</span> <span class='kw'>in</span> <span class='number'>0</span>..<span class='number'>256</span> {
|
||
<span class='ident'>byte_classes</span>[<span class='ident'>i</span>] <span class='op'>=</span> <span class='ident'>class</span>;
|
||
<span class='kw'>if</span> <span class='self'>self</span>.<span class='number'>0</span>[<span class='ident'>i</span>] {
|
||
<span class='ident'>class</span> <span class='op'>=</span> <span class='ident'>class</span>.<span class='ident'>checked_add</span>(<span class='number'>1</span>).<span class='ident'>unwrap</span>();
|
||
}
|
||
}
|
||
<span class='ident'>byte_classes</span>
|
||
}
|
||
}
|
||
|
||
<span class='kw'>fn</span> <span class='ident'>u32_to_usize</span>(<span class='ident'>n</span>: <span class='ident'>u32</span>) <span class='op'>-></span> <span class='ident'>usize</span> {
|
||
<span class='kw'>if</span> (<span class='ident'>n</span> <span class='kw'>as</span> <span class='ident'>u64</span>) <span class='op'>></span> (::<span class='ident'>std</span>::<span class='ident'>usize</span>::<span class='ident'>MAX</span> <span class='kw'>as</span> <span class='ident'>u64</span>) {
|
||
<span class='macro'>panic</span><span class='macro'>!</span>(<span class='string'>"BUG: {} is too big to be pointer sized"</span>, <span class='ident'>n</span>)
|
||
}
|
||
<span class='ident'>n</span> <span class='kw'>as</span> <span class='ident'>usize</span>
|
||
}
|
||
|
||
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>test</span>)]</span>
|
||
<span class='kw'>mod</span> <span class='ident'>tests</span> {
|
||
<span class='kw'>use</span> <span class='ident'>super</span>::<span class='ident'>ByteClassSet</span>;
|
||
|
||
<span class='attribute'>#[<span class='ident'>test</span>]</span>
|
||
<span class='kw'>fn</span> <span class='ident'>byte_classes</span>() {
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>set</span> <span class='op'>=</span> <span class='ident'>ByteClassSet</span>::<span class='ident'>new</span>();
|
||
<span class='ident'>set</span>.<span class='ident'>set_range</span>(<span class='string'>b'a'</span>, <span class='string'>b'z'</span>);
|
||
<span class='kw'>let</span> <span class='ident'>classes</span> <span class='op'>=</span> <span class='ident'>set</span>.<span class='ident'>byte_classes</span>();
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='number'>0</span>], <span class='number'>0</span>);
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='number'>1</span>], <span class='number'>0</span>);
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='number'>2</span>], <span class='number'>0</span>);
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='string'>b'a'</span> <span class='kw'>as</span> <span class='ident'>usize</span> <span class='op'>-</span> <span class='number'>1</span>], <span class='number'>0</span>);
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='string'>b'a'</span> <span class='kw'>as</span> <span class='ident'>usize</span>], <span class='number'>1</span>);
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='string'>b'm'</span> <span class='kw'>as</span> <span class='ident'>usize</span>], <span class='number'>1</span>);
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='string'>b'z'</span> <span class='kw'>as</span> <span class='ident'>usize</span>], <span class='number'>1</span>);
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='string'>b'z'</span> <span class='kw'>as</span> <span class='ident'>usize</span> <span class='op'>+</span> <span class='number'>1</span>], <span class='number'>2</span>);
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='number'>254</span>], <span class='number'>2</span>);
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='number'>255</span>], <span class='number'>2</span>);
|
||
|
||
<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>set</span> <span class='op'>=</span> <span class='ident'>ByteClassSet</span>::<span class='ident'>new</span>();
|
||
<span class='ident'>set</span>.<span class='ident'>set_range</span>(<span class='number'>0</span>, <span class='number'>2</span>);
|
||
<span class='ident'>set</span>.<span class='ident'>set_range</span>(<span class='number'>4</span>, <span class='number'>6</span>);
|
||
<span class='kw'>let</span> <span class='ident'>classes</span> <span class='op'>=</span> <span class='ident'>set</span>.<span class='ident'>byte_classes</span>();
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='number'>0</span>], <span class='number'>0</span>);
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='number'>1</span>], <span class='number'>0</span>);
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='number'>2</span>], <span class='number'>0</span>);
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='number'>3</span>], <span class='number'>1</span>);
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='number'>4</span>], <span class='number'>2</span>);
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='number'>5</span>], <span class='number'>2</span>);
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='number'>6</span>], <span class='number'>2</span>);
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='number'>7</span>], <span class='number'>3</span>);
|
||
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>classes</span>[<span class='number'>255</span>], <span class='number'>3</span>);
|
||
}
|
||
}
|
||
</pre>
|
||
</section>
|
||
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|
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<h2>Search Tricks</h2>
|
||
|
||
<p>
|
||
Prefix searches with a type followed by a colon (e.g.
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<code>fn:</code>) to restrict the search to a given type.
|
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|
||
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|
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Accepted types are: <code>fn</code>, <code>mod</code>,
|
||
<code>struct</code>, <code>enum</code>,
|
||
<code>trait</code>, <code>type</code>, <code>macro</code>,
|
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and <code>const</code>.
|
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|
||
|
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<p>
|
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Search functions by type signature (e.g.
|
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