Add an AST matcher for real floating-point types. e.g., float, double, long double, but not complex.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@261221 91177308-0d34-0410-b5e6-96231b3b80d8

docs/LibASTMatchersReference.html

@@ -2176,23 +2176,6 @@ fieldDecl(isPublic())
 </pre></td></tr>
 
 
-<tr><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1Expr.html">Expr</a>&gt;</td><td class="name" onclick="toggle('nullPointerConstant0')"><a name="nullPointerConstant0Anchor">nullPointerConstant</a></td><td></td></tr>
-<tr><td colspan="4" class="doc" id="nullPointerConstant0"><pre>Matches expressions that resolve to a null pointer constant, such as
-GNU's __null, C++11's nullptr, or C's NULL macro.
-
-Given:
-  void *v1 = NULL;
-  void *v2 = nullptr;
-  void *v3 = __null; GNU extension
-  char *cp = (char *)0;
-  int *ip = 0;
-  int i = 0;
-expr(nullPointerConstant())
-  matches the initializer for v1, v2, v3, cp, and ip. Does not match the
-  initializer for i.
-</pre></td></tr>
-
-
 <tr><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1FloatingLiteral.html">FloatingLiteral</a>&gt;</td><td class="name" onclick="toggle('equals1')"><a name="equals1Anchor">equals</a></td><td>ValueT  Value</td></tr>
 <tr><td colspan="4" class="doc" id="equals1"><pre>Matches literals that are equal to the given value.
 
@@ -2429,7 +2412,7 @@ memberExpr(isArrow())
 </pre></td></tr>
 
 
-<tr><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1NamedDecl.html">NamedDecl</a>&gt;</td><td class="name" onclick="toggle('hasName0')"><a name="hasName0Anchor">hasName</a></td><td>std::string  Name</td></tr>
+<tr><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1NamedDecl.html">NamedDecl</a>&gt;</td><td class="name" onclick="toggle('hasName0')"><a name="hasName0Anchor">hasName</a></td><td>std::string Name</td></tr>
 <tr><td colspan="4" class="doc" id="hasName0"><pre>Matches NamedDecl nodes that have the specified name.
 
 Supports specifying enclosing namespaces or classes by prefixing the name
@@ -2621,6 +2604,17 @@ matches "a(char)", "b(wchar_t)", but not "c(double)".
 </pre></td></tr>
 
 
+<tr><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1QualType.html">QualType</a>&gt;</td><td class="name" onclick="toggle('isAnyPointer0')"><a name="isAnyPointer0Anchor">isAnyPointer</a></td><td></td></tr>
+<tr><td colspan="4" class="doc" id="isAnyPointer0"><pre>Matches QualType nodes that are of any pointer type.
+
+Given
+  int *i = nullptr;
+  int j;
+varDecl(hasType(isAnyPointer()))
+  matches "int *i", but not "int j".
+</pre></td></tr>
+
+
 <tr><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1QualType.html">QualType</a>&gt;</td><td class="name" onclick="toggle('isConstQualified0')"><a name="isConstQualified0Anchor">isConstQualified</a></td><td></td></tr>
 <tr><td colspan="4" class="doc" id="isConstQualified0"><pre>Matches QualType nodes that are const-qualified, i.e., that
 include "top-level" const.
@@ -2894,6 +2888,17 @@ and reference to that variable declaration within a compound statement.
 </pre></td></tr>
 
 
+<tr><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1Type.html">Type</a>&gt;</td><td class="name" onclick="toggle('realFloatingPointType0')"><a name="realFloatingPointType0Anchor">realFloatingPointType</a></td><td></td></tr>
+<tr><td colspan="4" class="doc" id="realFloatingPointType0"><pre>Matches any real floating-point type (float, double, long double).
+
+Given
+  int i;
+  float f;
+realFloatingPointType()
+  matches "float f" but not "int i"
+</pre></td></tr>
+
+
 <tr><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1Type.html">Type</a>&gt;</td><td class="name" onclick="toggle('voidType0')"><a name="voidType0Anchor">voidType</a></td><td></td></tr>
 <tr><td colspan="4" class="doc" id="voidType0"><pre>Matches type void.
 
@@ -3080,6 +3085,23 @@ functionDecl(isInstantiated())
 </pre></td></tr>
 
 
+<tr><td>Matcher&lt;internal::Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1Expr.html">Expr</a>&gt;&gt;</td><td class="name" onclick="toggle('nullPointerConstant0')"><a name="nullPointerConstant0Anchor">nullPointerConstant</a></td><td></td></tr>
+<tr><td colspan="4" class="doc" id="nullPointerConstant0"><pre>Matches expressions that resolve to a null pointer constant, such as
+GNU's __null, C++11's nullptr, or C's NULL macro.
+
+Given:
+  void *v1 = NULL;
+  void *v2 = nullptr;
+  void *v3 = __null; GNU extension
+  char *cp = (char *)0;
+  int *ip = 0;
+  int i = 0;
+expr(nullPointerConstant())
+  matches the initializer for v1, v2, v3, cp, and ip. Does not match the
+  initializer for i.
+</pre></td></tr>
+
+
 <tr><td>Matcher&lt;internal::Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1Stmt.html">Stmt</a>&gt;&gt;</td><td class="name" onclick="toggle('isInTemplateInstantiation0')"><a name="isInTemplateInstantiation0Anchor">isInTemplateInstantiation</a></td><td></td></tr>
 <tr><td colspan="4" class="doc" id="isInTemplateInstantiation0"><pre>Matches statements inside of a template instantiation.
 

include/clang/ASTMatchers/ASTMatchers.h

@@ -3961,6 +3961,19 @@ AST_TYPE_MATCHER(ArrayType, arrayType);
 ///   matches "_Complex float f"
 AST_TYPE_MATCHER(ComplexType, complexType);
 
+/// \brief Matches any real floating-point type (float, double, long double).
+///
+/// Given
+/// \code
+///   int i;
+///   float f;
+/// \endcode
+/// realFloatingPointType()
+///   matches "float f" but not "int i"
+AST_MATCHER(Type, realFloatingPointType) {
+  return Node.isRealFloatingType();
+}
+
 /// \brief Matches arrays and C99 complex types that have a specific element
 /// type.
 ///

lib/ASTMatchers/Dynamic/Registry.cpp

@@ -342,6 +342,7 @@ RegistryMaps::RegistryMaps() {
   REGISTER_MATCHER(pointee);
   REGISTER_MATCHER(pointerType);
   REGISTER_MATCHER(qualType);
+  REGISTER_MATCHER(realFloatingPointType);
   REGISTER_MATCHER(recordDecl);
   REGISTER_MATCHER(recordType);
   REGISTER_MATCHER(referenceType);

unittests/ASTMatchers/ASTMatchersTest.cpp

@@ -4415,6 +4415,15 @@ TEST(TypeMatching, MatchesVoid) {
                       cxxMethodDecl(returns(voidType()))));
 }
 
+TEST(TypeMatching, MatchesRealFloats) {
+  EXPECT_TRUE(matches("struct S { float func(); };",
+                      cxxMethodDecl(returns(realFloatingPointType()))));
+  EXPECT_TRUE(notMatches("struct S { int func(); };",
+                         cxxMethodDecl(returns(realFloatingPointType()))));
+  EXPECT_TRUE(matches("struct S { long double func(); };",
+                      cxxMethodDecl(returns(realFloatingPointType()))));
+}
+
 TEST(TypeMatching, MatchesArrayTypes) {
   EXPECT_TRUE(matches("int a[] = {2,3};", arrayType()));
   EXPECT_TRUE(matches("int a[42];", arrayType()));