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<a href='https://github.com/akkartik/mu/blob/master/apps/factorial.mu'>https://github.com/akkartik/mu/blob/master/apps/factorial.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="Comment"># usage is finicky for now:</span>
<span id="L2" class="LineNr"> 2 </span><span class="Comment"># ./translate_mu apps/factorial.mu</span>
<span id="L3" class="LineNr"> 3 </span><span class="Comment"># ./a.elf test # any args? run tests</span>
<span id="L4" class="LineNr"> 4 </span><span class="Comment"># ./a.elf # no args? run factorial(5)</span>
<span id="L5" class="LineNr"> 5 </span><span class="PreProc">fn</span> <a href='../mu-init-test.subx.html#L7'>main</a> args: (addr array kernel-string)<span class="PreProc"> -> </span>exit-status/<span class="Constant">ebx</span>: int <span class="Delimiter">{</span>
<span id="L6" class="LineNr"> 6 </span> var a/<span class="Constant">eax</span>: (addr array kernel-string) <span class="Special"><-</span> copy args
<span id="L7" class="LineNr"> 7 </span> var tmp/<span class="Constant">ecx</span>: int <span class="Special"><-</span> length a
<span id="L8" class="LineNr"> 8 </span> $main-body: <span class="Delimiter">{</span>
<span id="L9" class="LineNr"> 9 </span> compare tmp,<span class="Constant"> 1</span>
<span id="L10" class="LineNr">10 </span> <span class="Comment"># if (len(args) != 1) run-tests()</span>
<span id="L11" class="LineNr">11 </span> <span class="Delimiter">{</span>
<span id="L12" class="LineNr">12 </span> break-if-=
<span id="L13" class="LineNr">13 </span> run-tests
<span id="L14" class="LineNr">14 </span> exit-status <span class="Special"><-</span> copy<span class="Constant"> 0</span>
<span id="L15" class="LineNr">15 </span> <span class="Identifier"> break</span> $main-body
<span id="L16" class="LineNr">16 </span> <span class="Delimiter">}</span>
<span id="L17" class="LineNr">17 </span> <span class="Comment"># if (len(args) == 1) factorial(5)</span>
<span id="L18" class="LineNr">18 </span> <span class="Delimiter">{</span>
<span id="L19" class="LineNr">19 </span> break-if-!=
<span id="L20" class="LineNr">20 </span> var tmp/<span class="Constant">eax</span>: int <span class="Special"><-</span> factorial<span class="Constant"> 5</span>
<span id="L21" class="LineNr">21 </span> exit-status <span class="Special"><-</span> copy tmp
<span id="L22" class="LineNr">22 </span> <span class="Delimiter">}</span>
<span id="L23" class="LineNr">23 </span> <span class="Delimiter">}</span>
<span id="L24" class="LineNr">24 </span><span class="Delimiter">}</span>
<span id="L25" class="LineNr">25 </span>
<span id="L26" class="LineNr">26 </span><span class="PreProc">fn</span> factorial n: int<span class="PreProc"> -> </span>result/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
<span id="L27" class="LineNr">27 </span> compare n<span class="Constant"> 1</span>
<span id="L28" class="LineNr">28 </span> <span class="Delimiter">{</span>
<span id="L29" class="LineNr">29 </span> break-if->
<span id="L30" class="LineNr">30 </span> result <span class="Special"><-</span> copy<span class="Constant"> 1</span>
<span id="L31" class="LineNr">31 </span> <span class="Delimiter">}</span>
<span id="L32" class="LineNr">32 </span> <span class="Delimiter">{</span>
<span id="L33" class="LineNr">33 </span> break-if-<=
<span id="L34" class="LineNr">34 </span> var tmp/<span class="Constant">ecx</span>: int <span class="Special"><-</span> copy n
<span id="L35" class="LineNr">35 </span> tmp <span class="Special"><-</span> decrement
<span id="L36" class="LineNr">36 </span> result <span class="Special"><-</span> factorial tmp
<span id="L37" class="LineNr">37 </span> result <span class="Special"><-</span> multiply n
<span id="L38" class="LineNr">38 </span> <span class="Delimiter">}</span>
<span id="L39" class="LineNr">39 </span><span class="Delimiter">}</span>
<span id="L40" class="LineNr">40 </span>
<span id="L41" class="LineNr">41 </span><span class="PreProc">fn</span> test-factorial <span class="Delimiter">{</span>
<span id="L42" class="LineNr">42 </span> var result/<span class="Constant">eax</span>: int <span class="Special"><-</span> factorial<span class="Constant"> 5</span>
<span id="L43" class="LineNr">43 </span> <a href='../051test.subx.html#L24'>check-ints-equal</a> result 0x78 <span class="Constant">"F</span> - test-factorial"
<span id="L44" class="LineNr">44 </span><span class="Delimiter">}</span>
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