Adding isConst() ASTMatcher for CXXMethodDecl nodes

Updated reference and unit tests.

llvm-svn: 181522

3 files changed, 35 insertions, 0 deletions

diff --git a/clang/docs/LibASTMatchersReference.html b/clang/docs/LibASTMatchersReference.html
index e571c0780c3..0ea55bfef54 100644
--- a/clang/docs/LibASTMatchersReference.html
+++ b/clang/docs/LibASTMatchersReference.html
@@ -1524,6 +1524,19 @@ Usable as: Matcher&lt<a href="http://clang.llvm.org/doxygen/classclang_1_1CXXOpe
 </pre></td></tr>
 
 
+<tr><td>Matcher&lt<a href="http://clang.llvm.org/doxygen/classclang_1_1CXXMethodDecl.html">CXXMethodDecl</a>&gt;</td><td class="name" onclick="toggle('isConst0')"><a name="isConst0Anchor">isConst</a></td><td></td></tr>
+<tr><td colspan="4" class="doc" id="isConst0"><pre>Matches if the given method declaration is const.
+
+Given
+struct A {
+  void foo() const;
+  void bar();
+};
+
+methodDecl(isConst()) matches A::foo() but not A::bar()
+</pre></td></tr>
+
+
 <tr><td>Matcher&lt<a href="http://clang.llvm.org/doxygen/classclang_1_1CXXMethodDecl.html">CXXMethodDecl</a>&gt;</td><td class="name" onclick="toggle('isOverride0')"><a name="isOverride0Anchor">isOverride</a></td><td></td></tr>
 <tr><td colspan="4" class="doc" id="isOverride0"><pre>Matches if the given method declaration overrides another method.
 
diff --git a/clang/include/clang/ASTMatchers/ASTMatchers.h b/clang/include/clang/ASTMatchers/ASTMatchers.h
index 70f539be794..2b04f8c2e4b 100644
--- a/clang/include/clang/ASTMatchers/ASTMatchers.h
+++ b/clang/include/clang/ASTMatchers/ASTMatchers.h
@@ -2542,6 +2542,21 @@ AST_MATCHER(CXXMethodDecl, isVirtual) {
   return Node.isVirtual();
 }
 
+/// \brief Matches if the given method declaration is const.
+///
+/// Given
+/// \code
+/// struct A {
+///   void foo() const;
+///   void bar();
+/// };
+/// \endcode
+///
+/// methodDecl(isConst()) matches A::foo() but not A::bar()
+AST_MATCHER(CXXMethodDecl, isConst) {
+  return Node.isConst();
+}
+
 /// \brief Matches if the given method declaration overrides another method.
 ///
 /// Given
diff --git a/clang/unittests/ASTMatchers/ASTMatchersTest.cpp b/clang/unittests/ASTMatchers/ASTMatchersTest.cpp
index cfa53868ed2..50aa583f940 100644
--- a/clang/unittests/ASTMatchers/ASTMatchersTest.cpp
+++ b/clang/unittests/ASTMatchers/ASTMatchersTest.cpp
@@ -1507,6 +1507,13 @@ TEST(Matcher, MatchesVirtualMethod) {
       methodDecl(isVirtual())));
 }
 
+TEST(Matcher, MatchesConstMethod) {
+  EXPECT_TRUE(matches("struct A { void foo() const; };",
+                      methodDecl(isConst())));
+  EXPECT_TRUE(notMatches("struct A { void foo(); };",
+                         methodDecl(isConst())));
+}
+
 TEST(Matcher, MatchesOverridingMethod) {
   EXPECT_TRUE(matches("class X { virtual int f(); }; "
                       "class Y : public X { int f(); };",