Provide match function to look over an entire TU again.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@259648 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/ASTMatchers/ASTMatchFinder.h

@@ -241,6 +241,11 @@ match(MatcherT Matcher, const ast_type_traits::DynTypedNode &Node,
       ASTContext &Context);
 /// @}
 
+/// \brief Returns the results of matching \p Matcher on the translation unit of
+/// \p Context and collects the \c BoundNodes of all callback invocations.
+template <typename MatcherT>
+SmallVector<BoundNodes, 1> match(MatcherT Matcher, ASTContext &Context);
+
 /// \brief Returns the first result of type \c NodeT bound to \p BoundTo.
 ///
 /// Returns \c NULL if there is no match, or if the matching node cannot be
@@ -288,6 +293,16 @@ match(MatcherT Matcher, const NodeT &Node, ASTContext &Context) {
   return match(Matcher, ast_type_traits::DynTypedNode::create(Node), Context);
 }
 
+template <typename MatcherT>
+SmallVector<BoundNodes, 1>
+match(MatcherT Matcher, ASTContext &Context) {
+  internal::CollectMatchesCallback Callback;
+  MatchFinder Finder;
+  Finder.addMatcher(Matcher, &Callback);
+  Finder.matchAST(Context);
+  return std::move(Callback.Nodes);
+}
+
 } // end namespace ast_matchers
 } // end namespace clang
 

unittests/ASTMatchers/ASTMatchersTest.cpp

@@ -5050,6 +5050,15 @@ TEST(MatchFinder, InterceptsEndOfTranslationUnit) {
   EXPECT_TRUE(VerifyCallback.Called);
 }
 
+TEST(Matcher, matchOverEntireASTContext) {
+  std::unique_ptr<ASTUnit> AST =
+      clang::tooling::buildASTFromCode("struct { int *foo; };");
+  ASSERT_TRUE(AST.get());
+  auto PT = selectFirst<PointerType>(
+      "x", match(pointerType().bind("x"), AST->getASTContext()));
+  EXPECT_NE(nullptr, PT);
+}
+
 TEST(EqualsBoundNodeMatcher, QualType) {
   EXPECT_TRUE(matches(
       "int i = 1;", varDecl(hasType(qualType().bind("type")),
@@ -5276,7 +5285,6 @@ TEST(ObjCMessageExprMatcher, SimpleExprs) {
       objcMessageExpr(matchesSelector("uppercase*"),
                       argumentCountIs(0)
                       )));
-  
 }
 
 } // end namespace ast_matchers