Add a new matcher to match character types.

llvm-svn: 255627

clang/include/clang/ASTMatchers/ASTMatchers.h

@@ -3533,6 +3533,20 @@ AST_MATCHER(QualType, isInteger) {
     return Node->isIntegerType();
 }
 
+/// \brief Matches QualType nodes that are of character type.
+///
+/// Given
+/// \code
+///   void a(char);
+///   void b(wchar_t);
+///   void c(double);
+/// \endcode
+/// functionDecl(hasAnyParameter(hasType(isAnyCharacter())))
+/// matches "a(char)", "b(wchar_t)", but not "c(double)".
+AST_MATCHER(QualType, isAnyCharacter) {
+    return Node->isAnyCharacterType();
+}
+
 /// \brief Matches QualType nodes that are const-qualified, i.e., that
 /// include "top-level" const.
 ///

clang/unittests/ASTMatchers/ASTMatchersTest.cpp

@@ -1469,6 +1469,14 @@ TEST(IsInteger, ReportsNoFalsePositives) {
                           to(varDecl(hasType(isInteger()))))))));
 }
 
+TEST(IsAnyCharacter, MatchesCharacters) {
+  EXPECT_TRUE(matches("char i = 0;", varDecl(hasType(isAnyCharacter()))));
+}
+
+TEST(IsAnyCharacter, ReportsNoFalsePositives) {
+  EXPECT_TRUE(notMatches("int i;", varDecl(hasType(isAnyCharacter()))));
+}
+
 TEST(IsArrow, MatchesMemberVariablesViaArrow) {
   EXPECT_TRUE(matches("class Y { void x() { this->y; } int y; };",
               memberExpr(isArrow())));