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<h3>
Raymond Toy pushed to branch master
at <a href="https://gitlab.common-lisp.net/cmucl/cmucl">cmucl / cmucl</a>
</h3>
<h4>
Commits:
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<strong><a href="https://gitlab.common-lisp.net/cmucl/cmucl/-/commit/1144015fe3028e62dbe4ae380425ce5aa8ecfdc1">1144015f</a></strong>
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<span>by Raymond Toy</span>
<i>at 2021-01-10T04:33:03+00:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix #91: Handle loop destructuring
The destructuring shortcut in loop doesn't require all the parts be
available. If they're not, each item is replaced by NIL.
This is fixed by still using `destructuring-bind`, except we mark
everything as optional.
</pre>
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<strong><a href="https://gitlab.common-lisp.net/cmucl/cmucl/-/commit/5b5082c6cbe682d5805630d4e92f858ea372def1">5b5082c6</a></strong>
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<span>by Raymond Toy</span>
<i>at 2021-01-10T04:33:04+00:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Merge branch 'issue-91-loop-destructuring-bind' into 'master'
Fix #91: loop destructuring bind
Closes #91
See merge request cmucl/cmucl!63</pre>
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<h4>1 changed file:</h4>
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<a href="#935df66bbd33bbfd49d76e6657d87a8f0be8c456">
src/code/loop.lisp
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<h4>Changes:</h4>
<li id="935df66bbd33bbfd49d76e6657d87a8f0be8c456">
<a href="https://gitlab.common-lisp.net/cmucl/cmucl/-/compare/fdeafbc630fd3599062a68eafb3b82574cd34d9c...5b5082c6cbe682d5805630d4e92f858ea372def1#935df66bbd33bbfd49d76e6657d87a8f0be8c456"><strong>src/code/loop.lisp</strong></a>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="995" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -995,7 +995,10 @@ collected result will be returned as the value of the LOOP."</td>
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995
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995
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<pre style="margin: 0;"> <span id="LC995" class="line" lang="common_lisp"> <span class="p">(</span><span class="k" style="font-weight: 600;">if</span> <span class="nv" style="color: #008080;">crocks</span></span>
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996
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<td class="diff-line-num new_line" data-linenumber="996" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
996
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<pre style="margin: 0;"> <span id="LC996" class="line" lang="common_lisp"> <span class="p">(</span><span class="k" style="font-weight: 600;">let</span> <span class="p">((</span><span class="vg" style="color: #008080;">*ignores*</span> <span class="p">()))</span></span>
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997
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997
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<pre style="margin: 0;"> <span id="LC997" class="line" lang="common_lisp"> <span class="p">(</span><span class="k" style="font-weight: 600;">declare</span> <span class="p">(</span><span class="k" style="font-weight: 600;">special</span> <span class="vg" style="color: #008080;">*ignores*</span><span class="p">))</span></span>
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998
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<pre style="margin: 0;">-<span id="LC998" class="line" lang="common_lisp"> <span class="o" style="font-weight: 600;">`</span><span class="p">((</span><span class="nb" style="color: #0086b3;">destructuring-bind</span> <span class="o" style="font-weight: 600;">,</span><span class="p">(</span><span class="nv" style="color: #008080;">subst-gensyms-for-nil</span> <span class="p">(</span><span class="nb" style="color: #0086b3;">car</span> <span class="nv" style="color: #008080;">crocks</span><span class="p">))</span></span>
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998
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<pre style="margin: 0;">+<span id="LC998" class="line" lang="common_lisp"> <span class="c1" style="color: #998; font-style: italic;">;; Destructuring in loop doesn't require that the values be</span></span>
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999
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<pre style="margin: 0;">+<span id="LC999" class="line" lang="common_lisp"> <span class="c1" style="color: #998; font-style: italic;">;; available. The missing elements are filled with NIL. So,</span></span>
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1000
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<pre style="margin: 0;">+<span id="LC1000" class="line" lang="common_lisp"> <span class="c1" style="color: #998; font-style: italic;">;; make everything &optional</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1001" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1001
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<pre style="margin: 0;">+<span id="LC1001" class="line" lang="common_lisp"> <span class="o" style="font-weight: 600;">`</span><span class="p">((</span><span class="nb" style="color: #0086b3;">destructuring-bind</span> <span class="p">(</span><span class="k" style="font-weight: 600;">&optional</span> <span class="o" style="font-weight: 600;">,@</span><span class="p">(</span><span class="nv" style="color: #008080;">subst-gensyms-for-nil</span> <span class="p">(</span><span class="nb" style="color: #0086b3;">car</span> <span class="nv" style="color: #008080;">crocks</span><span class="p">)))</span></span>
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999
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<td class="diff-line-num new_line" data-linenumber="1002" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
1002
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<pre style="margin: 0;"> <span id="LC1002" class="line" lang="common_lisp"> <span class="o" style="font-weight: 600;">,</span><span class="p">(</span><span class="nb" style="color: #0086b3;">cadr</span> <span class="nv" style="color: #008080;">crocks</span><span class="p">)</span></span>
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1000
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<td class="diff-line-num new_line" data-linenumber="1003" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
1003
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<pre style="margin: 0;"> <span id="LC1003" class="line" lang="common_lisp"> <span class="p">(</span><span class="k" style="font-weight: 600;">declare</span> <span class="p">(</span><span class="k" style="font-weight: 600;">ignore</span> <span class="o" style="font-weight: 600;">,@</span><span class="vg" style="color: #008080;">*ignores*</span><span class="p">))</span></span>
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1001
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<td class="diff-line-num new_line" data-linenumber="1004" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
1004
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<pre style="margin: 0;"> <span id="LC1004" class="line" lang="common_lisp"> <span class="o" style="font-weight: 600;">,@</span><span class="p">(</span><span class="nv" style="color: #008080;">loop-build-destructuring-bindings</span> <span class="p">(</span><span class="nb" style="color: #0086b3;">cddr</span> <span class="nv" style="color: #008080;">crocks</span><span class="p">)</span> <span class="nv" style="color: #008080;">forms</span><span class="p">))))</span></span>
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