add doc

Author: HerrCai0907

clang/docs/LibASTMatchersReference.html

@@ -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 {};
+  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.
 
@@ -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 {};
@@ -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))
+  matches C&lt;int&gt;.
+</pre></td></tr>
+
 <!--END_NARROWING_MATCHERS -->
 </table>