Add matchers for selected C++11 features.

Patch by Gábor Horváth.
Review: http://llvm-reviews.chandlerc.com/D46

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164943 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/ASTMatchers/ASTMatchers.h

@@ -489,6 +489,14 @@ const internal::VariadicDynCastAllOfMatcher<Stmt, MemberExpr> memberExpr;
 /// \endcode
 const internal::VariadicDynCastAllOfMatcher<Stmt, CallExpr> callExpr;
 
+/// \brief Matches lambda expressions.
+///
+/// Example matches [&](){return 5;}
+/// \code
+///   [&](){return 5;}
+/// \endcode
+const internal::VariadicDynCastAllOfMatcher<Stmt, LambdaExpr> lambdaExpr;
+
 /// \brief Matches member call expressions.
 ///
 /// Example matches x.y()
@@ -664,9 +672,19 @@ const internal::VariadicDynCastAllOfMatcher<Stmt, IfStmt> ifStmt;
 /// Example matches 'for (;;) {}'
 /// \code
 ///   for (;;) {}
+///   int i[] =  {1, 2, 3}; for (auto a : i);
 /// \endcode
 const internal::VariadicDynCastAllOfMatcher<Stmt, ForStmt> forStmt;
 
+/// \brief Matches range-based for statements.
+///
+/// forRangeStmt() matches 'for (auto a : i)'
+/// \code
+///   int i[] =  {1, 2, 3}; for (auto a : i);
+///   for(int j = 0; j < 5; ++j);
+/// \endcode
+const internal::VariadicDynCastAllOfMatcher<Stmt, CXXForRangeStmt> forRangeStmt;
+
 /// \brief Matches the increment statement of a for loop.
 ///
 /// Example:
@@ -884,6 +902,18 @@ const internal::VariadicDynCastAllOfMatcher<
   Stmt,
   IntegerLiteral> integerLiteral;
 
+/// \brief Matches user defined literal operator call.
+///
+/// Example match: "foo"_suffix
+const internal::VariadicDynCastAllOfMatcher<
+  Stmt,
+  UserDefinedLiteral> userDefinedLiteral;
+
+/// \brief Matches nullptr literal.
+const internal::VariadicDynCastAllOfMatcher<
+  Stmt,
+  CXXNullPtrLiteralExpr> nullPtrLiteralExpr;
+
 /// \brief Matches binary operator expressions.
 ///
 /// Example matches a || b

unittests/ASTMatchers/ASTMatchersTest.cpp

@@ -805,6 +805,27 @@ TEST(Matcher, Call) {
                  MethodOnYPointer));
 }
 
+TEST(Matcher, Lambda) {
+  EXPECT_TRUE(matches("auto f = [&] (int i) { return i; };",
+                      lambdaExpr()));
+}
+
+TEST(Matcher, ForRange) {
+  EXPECT_TRUE(matches("#include <initializer_list>\n"
+                      "void f() { for (auto &a : {1, 2, 3}); }",
+                      forRangeStmt()));
+  EXPECT_TRUE(notMatches("void f() { for (int i; i<5; ++i); }",
+                         forRangeStmt()));
+}
+
+TEST(Matcher, UserDefinedLiteral) {
+  EXPECT_TRUE(matches("constexpr char operator \"\" _inc (const char i) {"
+                      "  return i + 1;"
+                      "}"
+                      "char c = 'a'_inc;",
+                      userDefinedLiteral()));
+}
+
 TEST(Matcher, FlowControl) {
   EXPECT_TRUE(matches("void f() { while(true) { break; } }", breakStmt()));
   EXPECT_TRUE(matches("void f() { while(true) { continue; } }",
@@ -1556,6 +1577,10 @@ TEST(Matcher, IntegerLiterals) {
   EXPECT_TRUE(notMatches("int i = 10.0;", HasIntLiteral));
 }
 
+TEST(Matcher, NullPtrLiteral) {
+  EXPECT_TRUE(matches("int* i = nullptr;", nullPtrLiteralExpr()));
+}
+
 TEST(Matcher, AsmStatement) {
   EXPECT_TRUE(matches("void foo() { __asm(\"mov al, 2\"); }", asmStmt()));
 }
@@ -1981,6 +2006,9 @@ TEST(AstPolymorphicMatcherPMacro, Works) {
 TEST(For, FindsForLoops) {
   EXPECT_TRUE(matches("void f() { for(;;); }", forStmt()));
   EXPECT_TRUE(matches("void f() { if(true) for(;;); }", forStmt()));
+  EXPECT_TRUE(notMatches("#include <initializer_list>\n"
+                         "void f() { for (auto &a : {1, 2, 3}); }",
+                         forStmt()));
 }
 
 TEST(For, ForLoopInternals) {
@@ -2105,17 +2133,20 @@ TEST(Member, MatchesInMemberFunctionCall) {
 }
 
 TEST(Member, MatchesMemberAllocationFunction) {
-  EXPECT_TRUE(matches("namespace std { typedef typeof(sizeof(int)) size_t; }"
-                      "class X { void *operator new(std::size_t); };",
-                      methodDecl(ofClass(hasName("X")))));
+  // Fails in C++11 mode
+  EXPECT_TRUE(matchesConditionally(
+      "namespace std { typedef typeof(sizeof(int)) size_t; }"
+      "class X { void *operator new(std::size_t); };",
+      methodDecl(ofClass(hasName("X"))), true, "-std=gnu++98"));
 
   EXPECT_TRUE(matches("class X { void operator delete(void*); };",
                       methodDecl(ofClass(hasName("X")))));
 
-  EXPECT_TRUE(matches(
+  // Fails in C++11 mode
+  EXPECT_TRUE(matchesConditionally(
       "namespace std { typedef typeof(sizeof(int)) size_t; }"
       "class X { void operator delete[](void*, std::size_t); };",
-      methodDecl(ofClass(hasName("X")))));
+      methodDecl(ofClass(hasName("X"))), true, "-std=gnu++98"));
 }
 
 TEST(HasObjectExpression, DoesNotMatchMember) {

unittests/ASTMatchers/ASTMatchersTest.h

@@ -51,13 +51,14 @@ private:
 template <typename T>
 testing::AssertionResult matchesConditionally(const std::string &Code,
                                               const T &AMatcher,
-                                              bool ExpectMatch) {
+                                              bool ExpectMatch,
+                                              llvm::StringRef CompileArg) {
   bool Found = false;
   MatchFinder Finder;
   Finder.addMatcher(AMatcher, new VerifyMatch(0, &Found));
   OwningPtr<FrontendActionFactory> Factory(newFrontendActionFactory(&Finder));
   // Some tests use typeof, which is a gnu extension.
-  std::vector<std::string> Args(1, "-std=gnu++98");
+  std::vector<std::string> Args(1, CompileArg);
   if (!runToolOnCodeWithArgs(Factory->create(), Code, Args)) {
     return testing::AssertionFailure() << "Parsing error in \"" << Code << "\"";
   }
@@ -73,13 +74,13 @@ testing::AssertionResult matchesConditionally(const std::string &Code,
 
 template <typename T>
 testing::AssertionResult matches(const std::string &Code, const T &AMatcher) {
-  return matchesConditionally(Code, AMatcher, true);
+  return matchesConditionally(Code, AMatcher, true, "-std=c++11");
 }
 
 template <typename T>
 testing::AssertionResult notMatches(const std::string &Code,
                                     const T &AMatcher) {
-  return matchesConditionally(Code, AMatcher, false);
+  return matchesConditionally(Code, AMatcher, false, "-std=c++11");
 }
 
 template <typename T>