[ASTMatchers] Add matchers unresolvedMemberExpr, cxxDependentScopeMemberExpr

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D50606

llvm-svn: 339522

clang/docs/LibASTMatchersReference.html

@@ -866,6 +866,17 @@ cxxDeleteExpr()
 </pre></td></tr>
 
 
+<tr><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1Stmt.html">Stmt</a>&gt;</td><td class="name" onclick="toggle('cxxDependentScopeMemberExpr0')"><a name="cxxDependentScopeMemberExpr0Anchor">cxxDependentScopeMemberExpr</a></td><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1CXXDependentScopeMemberExpr.html">CXXDependentScopeMemberExpr</a>&gt;...</td></tr>
+<tr><td colspan="4" class="doc" id="cxxDependentScopeMemberExpr0"><pre>Matches member expressions where the actual member referenced could not be
+resolved because the base expression or the member name was dependent.
+
+Given
+  template &lt;class T&gt; void f() { T t; t.g(); }
+cxxDependentScopeMemberExpr()
+  matches t.g
+</pre></td></tr>
+
+
 <tr><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1Stmt.html">Stmt</a>&gt;</td><td class="name" onclick="toggle('cxxDynamicCastExpr0')"><a name="cxxDynamicCastExpr0Anchor">cxxDynamicCastExpr</a></td><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1CXXDynamicCastExpr.html">CXXDynamicCastExpr</a>&gt;...</td></tr>
 <tr><td colspan="4" class="doc" id="cxxDynamicCastExpr0"><pre>Matches a dynamic_cast expression.
 
@@ -1455,6 +1466,20 @@ unresolvedLookupExpr()
   matches foo&lt;T&gt;() </pre></td></tr>
 
 
+<tr><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1Stmt.html">Stmt</a>&gt;</td><td class="name" onclick="toggle('unresolvedMemberExpr0')"><a name="unresolvedMemberExpr0Anchor">unresolvedMemberExpr</a></td><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1UnresolvedMemberExpr.html">UnresolvedMemberExpr</a>&gt;...</td></tr>
+<tr><td colspan="4" class="doc" id="unresolvedMemberExpr0"><pre>Matches unresolved member expressions.
+
+Given
+  struct X {
+    template &lt;class T&gt; void f();
+    void g();
+  };
+  template &lt;class T&gt; void h() { X x; x.f&lt;T&gt;(); x.g(); }
+unresolvedMemberExpr()
+  matches x.f&lt;T&gt;
+</pre></td></tr>
+
+
 <tr><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1Stmt.html">Stmt</a>&gt;</td><td class="name" onclick="toggle('userDefinedLiteral0')"><a name="userDefinedLiteral0Anchor">userDefinedLiteral</a></td><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1UserDefinedLiteral.html">UserDefinedLiteral</a>&gt;...</td></tr>
 <tr><td colspan="4" class="doc" id="userDefinedLiteral0"><pre>Matches user defined literal operator call.
 
@@ -1598,7 +1623,7 @@ Given:
   short i = 1;
   int j = 42;
   decltype(i + j) result = i + j;
-decltypeType() 
+decltypeType()
   matches "decltype(i + j)"
 </pre></td></tr>
 

clang/include/clang/ASTMatchers/ASTMatchers.h

@@ -1141,6 +1141,34 @@ extern const internal::VariadicDynCastAllOfMatcher<Stmt, DeclStmt> declStmt;
 ///   matches this->x, x, y.x, a, this->b
 extern const internal::VariadicDynCastAllOfMatcher<Stmt, MemberExpr> memberExpr;
 
+/// Matches unresolved member expressions.
+///
+/// Given
+/// \code
+///   struct X {
+///     template <class T> void f();
+///     void g();
+///   };
+///   template <class T> void h() { X x; x.f<T>(); x.g(); }
+/// \endcode
+/// unresolvedMemberExpr()
+///   matches x.f<T>
+extern const internal::VariadicDynCastAllOfMatcher<Stmt, UnresolvedMemberExpr>
+    unresolvedMemberExpr;
+
+/// Matches member expressions where the actual member referenced could not be
+/// resolved because the base expression or the member name was dependent.
+///
+/// Given
+/// \code
+///   template <class T> void f() { T t; t.g(); }
+/// \endcode
+/// cxxDependentScopeMemberExpr()
+///   matches t.g
+extern const internal::VariadicDynCastAllOfMatcher<Stmt,
+                                                   CXXDependentScopeMemberExpr>
+    cxxDependentScopeMemberExpr;
+
 /// Matches call expressions.
 ///
 /// Example matches x.y() and y()

clang/lib/ASTMatchers/ASTMatchersInternal.cpp

@@ -610,6 +610,10 @@ const internal::VariadicDynCastAllOfMatcher<Decl, FriendDecl> friendDecl;
 const internal::VariadicAllOfMatcher<Stmt> stmt;
 const internal::VariadicDynCastAllOfMatcher<Stmt, DeclStmt> declStmt;
 const internal::VariadicDynCastAllOfMatcher<Stmt, MemberExpr> memberExpr;
+const internal::VariadicDynCastAllOfMatcher<Stmt, UnresolvedMemberExpr>
+    unresolvedMemberExpr;
+const internal::VariadicDynCastAllOfMatcher<Stmt, CXXDependentScopeMemberExpr>
+    cxxDependentScopeMemberExpr;
 const internal::VariadicDynCastAllOfMatcher<Stmt, CallExpr> callExpr;
 const internal::VariadicDynCastAllOfMatcher<Stmt, LambdaExpr> lambdaExpr;
 const internal::VariadicDynCastAllOfMatcher<Stmt, CXXMemberCallExpr>

clang/lib/ASTMatchers/Dynamic/Registry.cpp

@@ -167,6 +167,7 @@ RegistryMaps::RegistryMaps() {
   REGISTER_MATCHER(cxxCtorInitializer);
   REGISTER_MATCHER(cxxDefaultArgExpr);
   REGISTER_MATCHER(cxxDeleteExpr);
+  REGISTER_MATCHER(cxxDependentScopeMemberExpr);
   REGISTER_MATCHER(cxxDestructorDecl);
   REGISTER_MATCHER(cxxDynamicCastExpr);
   REGISTER_MATCHER(cxxForRangeStmt);
@@ -475,6 +476,7 @@ RegistryMaps::RegistryMaps() {
   REGISTER_MATCHER(unaryTransformType);
   REGISTER_MATCHER(unless);
   REGISTER_MATCHER(unresolvedLookupExpr);
+  REGISTER_MATCHER(unresolvedMemberExpr);
   REGISTER_MATCHER(unresolvedUsingTypenameDecl);
   REGISTER_MATCHER(unresolvedUsingValueDecl);
   REGISTER_MATCHER(userDefinedLiteral);

clang/unittests/AST/ASTImporterTest.cpp

@@ -814,9 +814,6 @@ TEST_P(ImportDecl, ImportFunctionTemplateDecl) {
       functionTemplateDecl());
 }
 
-const internal::VariadicDynCastAllOfMatcher<Expr, CXXDependentScopeMemberExpr>
-    cxxDependentScopeMemberExpr;
-
 TEST_P(ImportExpr, ImportCXXDependentScopeMemberExpr) {
   MatchVerifier<Decl> Verifier;
   testImport(
@@ -2364,9 +2361,6 @@ TEST_P(ImportExpr, DependentNameType) {
                  cxxRecordDecl(has(typedefDecl(has(dependentNameType())))))));
 }
 
-const internal::VariadicDynCastAllOfMatcher<Expr, UnresolvedMemberExpr>
-    unresolvedMemberExpr;
-
 TEST_P(ImportExpr, UnresolvedMemberExpr) {
   MatchVerifier<Decl> Verifier;
   testImport("struct S { template <typename T> void mem(); };"

clang/unittests/ASTMatchers/ASTMatchersNodeTest.cpp

@@ -422,10 +422,17 @@ TEST(UnaryExprOrTypeTraitExpr, MatchesSizeOfAndAlignOf) {
 
 TEST(MemberExpression, DoesNotMatchClasses) {
   EXPECT_TRUE(notMatches("class Y { void x() {} };", memberExpr()));
+  EXPECT_TRUE(notMatches("class Y { void x() {} };", unresolvedMemberExpr()));
+  EXPECT_TRUE(
+      notMatches("class Y { void x() {} };", cxxDependentScopeMemberExpr()));
 }
 
 TEST(MemberExpression, MatchesMemberFunctionCall) {
   EXPECT_TRUE(matches("class Y { void x() { x(); } };", memberExpr()));
+  EXPECT_TRUE(matches("class Y { template <class T> void x() { x<T>(); } };",
+                      unresolvedMemberExpr()));
+  EXPECT_TRUE(matches("template <class T> void x() { T t; t.f(); }",
+                      cxxDependentScopeMemberExpr()));
 }
 
 TEST(MemberExpression, MatchesVariable) {
@@ -435,6 +442,13 @@ TEST(MemberExpression, MatchesVariable) {
     matches("class Y { void x() { y; } int y; };", memberExpr()));
   EXPECT_TRUE(
     matches("class Y { void x() { Y y; y.y; } int y; };", memberExpr()));
+  EXPECT_TRUE(matches("template <class T>"
+                      "class X : T { void f() { this->T::v; } };",
+                      cxxDependentScopeMemberExpr()));
+  EXPECT_TRUE(matches("template <class T> class X : T { void f() { T::v; } };",
+                      cxxDependentScopeMemberExpr()));
+  EXPECT_TRUE(matches("template <class T> void x() { T t; t.v; }",
+                      cxxDependentScopeMemberExpr()));
 }
 
 TEST(MemberExpression, MatchesStaticVariable) {