87 lines
4.3 KiB
HTML
87 lines
4.3 KiB
HTML
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<a href='https://github.com/akkartik/mu/blob/master/continuation1.mu'>https://github.com/akkartik/mu/blob/master/continuation1.mu</a>
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<pre id='vimCodeElement'>
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<span id="L1" class="LineNr"> 1 </span><span class="Comment"># Example program showing that 'return-continuation-until-mark' can 'pause' a</span>
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<span id="L2" class="LineNr"> 2 </span><span class="Comment"># function call, returning a continuation, and that calling the continuation</span>
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<span id="L3" class="LineNr"> 3 </span><span class="Comment"># can 'resume' the paused function call.</span>
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<span id="L4" class="LineNr"> 4 </span><span class="Comment">#</span>
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<span id="L5" class="LineNr"> 5 </span><span class="Comment"># To run:</span>
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<span id="L6" class="LineNr"> 6 </span><span class="Comment"># $ git clone <a href="https://github.com/akkartik/mu">https://github.com/akkartik/mu</a></span>
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<span id="L7" class="LineNr"> 7 </span><span class="Comment"># $ cd mu</span>
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<span id="L8" class="LineNr"> 8 </span><span class="Comment"># $ ./mu continuation1.mu</span>
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<span id="L9" class="LineNr"> 9 </span><span class="Comment">#</span>
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<span id="L10" class="LineNr">10 </span><span class="Comment"># Expected output:</span>
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<span id="L11" class="LineNr">11 </span><span class="Comment"># 1</span>
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<span id="L12" class="LineNr">12 </span>
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<span id="L13" class="LineNr">13 </span><span class="muRecipe">def</span> <a href='continuation1.mu.html#L13'>main</a> [
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<span id="L14" class="LineNr">14 </span> <span class="Constant">local-scope</span>
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<span id="L15" class="LineNr">15 </span> k:continuation <span class="Special"><-</span> <span class="muControl">call-with-continuation-mark</span> <span class="Constant">100/mark</span>, <a href='continuation1.mu.html#L20'>create-yielder</a>
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<span id="L16" class="LineNr">16 </span> x:num <span class="Special"><-</span> call k <span class="Comment"># should return 1</span>
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<span id="L17" class="LineNr">17 </span> $print x <span class="Constant">10/newline</span>
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<span id="L18" class="LineNr">18 </span>]
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<span id="L19" class="LineNr">19 </span>
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<span id="L20" class="LineNr">20 </span><span class="muRecipe">def</span> <a href='continuation1.mu.html#L20'>create-yielder</a><span class="muRecipe"> -> </span>n:num [
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<span id="L21" class="LineNr">21 </span> <span class="Constant">local-scope</span>
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<span id="L22" class="LineNr">22 </span> <span class="Constant">load-inputs</span>
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<span id="L23" class="LineNr">23 </span> <span class="muControl">return-continuation-until-mark</span> <span class="Constant">100/mark</span>
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<span id="L24" class="LineNr">24 </span> <span class="muControl"> return</span><span class="Constant"> 1</span>
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<span id="L25" class="LineNr">25 </span>]
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</pre>
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