[PATCH] D20360: [ASTMatcher] Add a node matcher for UnresolvedLookupExpr.

[Haojian Wu via cfe-commits]

hokein created this revision.
hokein added a reviewer: alexfh.
hokein added a subscriber: cfe-commits.
Herald added a subscriber: klimek.

http://reviews.llvm.org/D20360

Files:
  docs/LibASTMatchersReference.html
  docs/tools/dump_ast_matchers.py
  include/clang/ASTMatchers/ASTMatchers.h
  lib/ASTMatchers/Dynamic/Registry.cpp
  unittests/ASTMatchers/ASTMatchersTest.cpp

Index: unittests/ASTMatchers/ASTMatchersTest.cpp
===================================================================
--- unittests/ASTMatchers/ASTMatchersTest.cpp
+++ unittests/ASTMatchers/ASTMatchersTest.cpp
@@ -1132,6 +1132,16 @@
                          declaratorDecl(hasTypeLoc(loc(asString("int"))))));
 }
 
+TEST(Matcher, UnresolvedLookupExpr) {
+  EXPECT_TRUE(matches("template<typename T>"
+                      "T foo() { T a; return a; }"
+                      "template<typename T>"
+                      "void bar() {"
+                      "  foo<T>();"
+                      "}",
+                      unresolvedLookupExpr()));
+}
+
 TEST(Matcher, Call) {
   // FIXME: Do we want to overload Call() to directly take
   // Matcher<Decl>, too?
Index: lib/ASTMatchers/Dynamic/Registry.cpp
===================================================================
--- lib/ASTMatchers/Dynamic/Registry.cpp
+++ lib/ASTMatchers/Dynamic/Registry.cpp
@@ -397,6 +397,7 @@
   REGISTER_MATCHER(unaryOperator);
   REGISTER_MATCHER(unaryTransformType);
   REGISTER_MATCHER(unless);
+  REGISTER_MATCHER(unresolvedLookupExpr);
   REGISTER_MATCHER(unresolvedUsingTypenameDecl);
   REGISTER_MATCHER(unresolvedUsingValueDecl);
   REGISTER_MATCHER(userDefinedLiteral);
Index: include/clang/ASTMatchers/ASTMatchers.h
===================================================================
--- include/clang/ASTMatchers/ASTMatchers.h
+++ include/clang/ASTMatchers/ASTMatchers.h
@@ -1086,6 +1086,24 @@
   Decl,
   UsingDirectiveDecl> usingDirectiveDecl;
 
+/// \brief Matches reference to a name which can be able to look up during
+/// parsing but could not be resolved to a specific declaration.
+///
+/// Given
+/// \code
+///   template<typename T>
+///   T foo() { T a; return a; }
+///   template<typename T>
+///   void bar() {
+///     foo<T>();
+///   }
+/// \endcode
+/// unresolvedLookupExpr()
+///   matches \code foo<T>() \endcode
+const internal::VariadicDynCastAllOfMatcher<
+   Stmt,
+   UnresolvedLookupExpr> unresolvedLookupExpr;
+
 /// \brief Matches unresolved using value declarations.
 ///
 /// Given
Index: docs/LibASTMatchersReference.html
===================================================================
--- docs/LibASTMatchersReference.html
+++ docs/LibASTMatchersReference.html
@@ -1275,6 +1275,21 @@
 </pre></td></tr>
 
 
+<tr><td>Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1Stmt.html">Stmt</a>></td><td class="name" onclick="toggle('unresolvedLookupExpr0')"><a name="unresolvedLookupExpr0Anchor">unresolvedLookupExpr</a></td><td>Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1UnresolvedLookupExpr.html">UnresolvedLookupExpr</a>>...</td></tr>
+<tr><td colspan="4" class="doc" id="unresolvedLookupExpr0"><pre>Matches reference to a name which can be able to look up during
+parsing but could not be resolved to a specific declaration.
+
+Given
+  template<typename T>
+  T foo() { T a; return a; }
+  template<typename T>
+  void bar() {
+    foo<T>();
+  }
+unresolvedLookupExpr()
+  matches foo<T>() </pre></td></tr>
+
+
 <tr><td>Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1Stmt.html">Stmt</a>></td><td class="name" onclick="toggle('userDefinedLiteral0')"><a name="userDefinedLiteral0Anchor">userDefinedLiteral</a></td><td>Matcher<<a href="http://clang.llvm.org/doxygen/classclang_1_1UserDefinedLiteral.html">UserDefinedLiteral</a>>...</td></tr>
 <tr><td colspan="4" class="doc" id="userDefinedLiteral0"><pre>Matches user defined literal operator call.
 


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