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[AstMatcher]templateArgumentCountIs support FunctionDecl #130416

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Merged
merged 7 commits into from
Mar 11, 2025
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[AstMatcher]templateArgumentCountIs support FunctionDecl #130416

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ca39210
[clang-tidy][NFC]refactor matcher for bugprone-optional-value-conversion
HerrCai0907 Mar 8, 2025
97ea315
[AstMatcher]`templateArgumentCountIs` support `FunctionDecl`
HerrCai0907 Mar 8, 2025
b28bd17
[AstMatcher]`templateArgumentCountIs` support `FunctionDecl`
HerrCai0907 Mar 8, 2025
397c487
Merge remote-tracking branch 'origin/main' into users/ccc03-08-_astma…
HerrCai0907 Mar 11, 2025
c04d320
add doc
HerrCai0907 Mar 11, 2025
d4d9536
Merge remote-tracking branch 'origin/users/ccc03-08-_astmatcher_templ…
HerrCai0907 Mar 11, 2025
3e2a7ef
add test and doc
HerrCai0907 Mar 11, 2025
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26 changes: 24 additions & 2 deletions clang/docs/LibASTMatchersReference.html
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Expand Up @@ -4833,6 +4833,17 @@ <h2 id="narrowing-matchers">Narrowing Matchers</h2>
</pre></td></tr>


<tr><td>Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1FunctionDecl.html">FunctionDecl</a>&gt;</td><td class="name" onclick="toggle('templateArgumentCountIs2')"><a name="templateArgumentCountIs2Anchor">templateArgumentCountIs</a></td><td>unsigned N</td></tr>
<tr><td colspan="4" class="doc" id="templateArgumentCountIs2"><pre>Matches if the number of template arguments equals N.

Given
template&lt;typename T&gt; struct C {};
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@carlosgalvezp carlosgalvezp Mar 11, 2025

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Shouldn't this example be for functionDecl, instead of classTemplateSpecializationDecl?

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@AaronBallman AaronBallman Mar 11, 2025

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This is auto-generated from the python script based on the comments on the matcher.

C&lt;int&gt; c;
classTemplateSpecializationDecl(templateArgumentCountIs(1))
matches C&lt;int&gt;.
</pre></td></tr>


<tr><td>Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1FunctionProtoType.html">FunctionProtoType</a>&gt;</td><td class="name" onclick="toggle('hasDynamicExceptionSpec1')"><a name="hasDynamicExceptionSpec1Anchor">hasDynamicExceptionSpec</a></td><td></td></tr>
<tr><td colspan="4" class="doc" id="hasDynamicExceptionSpec1"><pre>Matches functions that have a dynamic exception specification.

Expand Down Expand Up @@ -5783,8 +5794,8 @@ <h2 id="narrowing-matchers">Narrowing Matchers</h2>
</pre></td></tr>


<tr><td>Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1TemplateSpecializationType.html">TemplateSpecializationType</a>&gt;</td><td class="name" onclick="toggle('templateArgumentCountIs1')"><a name="templateArgumentCountIs1Anchor">templateArgumentCountIs</a></td><td>unsigned N</td></tr>
<tr><td colspan="4" class="doc" id="templateArgumentCountIs1"><pre>Matches if the number of template arguments equals N.
<tr><td>Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1TemplateSpecializationType.html">TemplateSpecializationType</a>&gt;</td><td class="name" onclick="toggle('templateArgumentCountIs3')"><a name="templateArgumentCountIs3Anchor">templateArgumentCountIs</a></td><td>unsigned N</td></tr>
<tr><td colspan="4" class="doc" id="templateArgumentCountIs3"><pre>Matches if the number of template arguments equals N.

Given
template&lt;typename T&gt; struct C {};
Expand Down Expand Up @@ -6219,6 +6230,17 @@ <h2 id="narrowing-matchers">Narrowing Matchers</h2>
Usable as: Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1FunctionDecl.html">FunctionDecl</a>&gt;, Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1VarDecl.html">VarDecl</a>&gt;, Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1CXXRecordDecl.html">CXXRecordDecl</a>&gt;
</pre></td></tr>


<tr><td>Matcher&lt;<a href="https://clang.llvm.org/doxygen/classclang_1_1VarTemplateSpecializationDecl.html">VarTemplateSpecializationDecl</a>&gt;</td><td class="name" onclick="toggle('templateArgumentCountIs1')"><a name="templateArgumentCountIs1Anchor">templateArgumentCountIs</a></td><td>unsigned N</td></tr>
<tr><td colspan="4" class="doc" id="templateArgumentCountIs1"><pre>Matches if the number of template arguments equals N.

Given
template&lt;typename T&gt; struct C {};
C&lt;int&gt; c;
classTemplateSpecializationDecl(templateArgumentCountIs(1))
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@carlosgalvezp carlosgalvezp Mar 11, 2025

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Same

matches C&lt;int&gt;.
</pre></td></tr>

<!--END_NARROWING_MATCHERS -->
</table>

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1 change: 1 addition & 0 deletions clang/include/clang/ASTMatchers/ASTMatchers.h
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Expand Up @@ -1090,6 +1090,7 @@ AST_POLYMORPHIC_MATCHER_P2(
AST_POLYMORPHIC_MATCHER_P(
templateArgumentCountIs,
AST_POLYMORPHIC_SUPPORTED_TYPES(ClassTemplateSpecializationDecl,
VarTemplateSpecializationDecl, FunctionDecl,
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@AaronBallman AaronBallman Mar 11, 2025

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It'd probably be good to update the example code above. Also, can you add test coverage to clang/unittests/ASTMatchers/ASTMatchersNarrowingTest.cpp?

TemplateSpecializationType),
unsigned, N) {
return internal::getTemplateSpecializationArgs(Node).size() == N;
Expand Down