[PATCH] Add floatLiteral to ASTMatchers

[Chris Gray]

Index: include/clang/ASTMatchers/ASTMatchers.h
===================================================================
--- include/clang/ASTMatchers/ASTMatchers.h (revision 187216)
+++ include/clang/ASTMatchers/ASTMatchers.h (working copy)
@@ -1078,6 +1078,18 @@
   Stmt,
   IntegerLiteral> integerLiteral;

+/// \brief Matches float literals of all sizes / encodings.
+///
+/// Not matching implicit conversions such as
+/// \code
+///   float a = 10;
+/// \endcode
+///
+/// Example matches 1.0, 1.0f, 1.0L, 1e10
+const internal::VariadicDynCastAllOfMatcher<
+  Stmt,
+  FloatingLiteral> floatLiteral;
+
 /// \brief Matches user defined literal operator call.
 ///
 /// Example match: "foo"_suffix
Index: unittests/ASTMatchers/ASTMatchersTest.cpp
===================================================================
--- unittests/ASTMatchers/ASTMatchersTest.cpp (revision 187216)
+++ unittests/ASTMatchers/ASTMatchersTest.cpp (working copy)
@@ -1853,6 +1853,17 @@
   EXPECT_TRUE(notMatches("int i = 10.0;", HasIntLiteral));
 }

+TEST(Matcher, FloatLiterals) {
+  StatementMatcher HasFloatLiteral = floatLiteral();
+  EXPECT_TRUE(matches("float i = 10.0;", HasFloatLiteral));
+  EXPECT_TRUE(matches("float i = 10.0f;", HasFloatLiteral));
+  EXPECT_TRUE(matches("double i = 10.0;", HasFloatLiteral));
+  EXPECT_TRUE(matches("double i = 10.0L;", HasFloatLiteral));
+  EXPECT_TRUE(matches("double i = 1e10;", HasFloatLiteral));
+
+  EXPECT_TRUE(notMatches("float i = 10;", HasFloatLiteral));
+}
+
 TEST(Matcher, NullPtrLiteral) {
   EXPECT_TRUE(matches("int* i = nullptr;", nullPtrLiteralExpr()));
 }
Index: lib/ASTMatchers/Dynamic/Registry.cpp
===================================================================
--- lib/ASTMatchers/Dynamic/Registry.cpp (revision 187216)
+++ lib/ASTMatchers/Dynamic/Registry.cpp (working copy)
@@ -252,6 +252,7 @@
   REGISTER_MATCHER(explicitCastExpr);
   REGISTER_MATCHER(expr);
   REGISTER_MATCHER(fieldDecl);
+  REGISTER_MATCHER(floatLiteral);
   REGISTER_MATCHER(forField);
   REGISTER_MATCHER(forRangeStmt);
   REGISTER_MATCHER(forStmt);
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