Matches the class declaration that the given method declaration
belongs to.
Index: include/clang/AST/ASTContext.h
===================================================================
--- include/clang/AST/ASTContext.h
+++ include/clang/AST/ASTContext.h
@@ -821,6 +821,9 @@
overridden_methods_end(const CXXMethodDecl *Method) const;
unsigned overridden_methods_size(const CXXMethodDecl *Method) const;
+ typedef llvm::iterator_range
+ overridden_method_range;
+ overridden_method_range overridden_methods(const CXXMethodDecl *Method) const;
/// \brief Note that the given C++ \p Method overrides the given \p
/// Overridden method.
Index: include/clang/AST/DeclCXX.h
===================================================================
--- include/clang/AST/DeclCXX.h
+++ include/clang/AST/DeclCXX.h
@@ -16,6 +16,7 @@
#ifndef LLVM_CLANG_AST_DECLCXX_H
#define LLVM_CLANG_AST_DECLCXX_H
+#include "clang/AST/ASTContext.h"
#include "clang/AST/ASTUnresolvedSet.h"
#include "clang/AST/Attr.h"
#include "clang/AST/Decl.h"
@@ -1827,6 +1828,8 @@
method_iterator begin_overridden_methods() const;
method_iterator end_overridden_methods() const;
unsigned size_overridden_methods() const;
+ typedef ASTContext::overridden_method_range overridden_method_range;
+ overridden_method_range overridden_methods() const;
/// Returns the parent of this method declaration, which
/// is the class in which this method is defined.
Index: include/clang/ASTMatchers/ASTMatchers.h
===================================================================
--- include/clang/ASTMatchers/ASTMatchers.h
+++ include/clang/ASTMatchers/ASTMatchers.h
@@ -3745,6 +3745,47 @@
InnerMatcher.matches(*Parent, Finder, Builder));
}
+/// \brief Matches each method overriden by the given method. This matcher may
+/// produce multiple matches.
+///
+/// Given
+/// \code
+/// class A { virtual void f(); };
+/// class B : public A { void f(); };
+/// class C : public B { void f(); };
+/// \endcode
+/// cxxMethodDecl(ofClass(hasName("C")),
+/// forEachOverridden(cxxMethodDecl().bind("b"))).bind("d")
+/// matches once, with "b" binding "A::f" and "d" binding "C::f" (Note
+/// that B::f is not overridden by C::f).
+///
+/// The check can produce multiple matches in case of multiple inheritance, e.g.
+/// \code
+/// class A1 { virtual void f(); };
+/// class A2 { virtual void f(); };
+/// class C : public A1, public A2 { void f(); };
+/// \endcode
+/// cxxMethodDecl(ofClass(hasName("C")),
+/// forEachOverridden(cxxMethodDecl().bind("b"))).bind("d")
+/// matches twice, once with "b" binding "A1::f" and "d" binding "C::f", and
+/// once with "b" binding "A2::f" and "d" binding "C::f".
+AST_MATCHER_P(CXXMethodDecl, forEachOverridden,
+ internal::Matcher, InnerMatcher) {
+ BoundNodesTreeBuilder Result;
+ bool Matched = false;
+ for (const auto *Overridden : Node.overridden_methods()) {
+ BoundNodesTreeBuilder OverriddenBuilder(*Builder);
+ const bool OverriddenMatched =
+ InnerMatcher.matches(*Overridden, Finder, &OverriddenBuilder);
+ if (OverriddenMatched) {
+ Matched = true;
+ Result.addMatch(OverriddenBuilder);
+ }
+ }
+ *Builder = std::move(Result);
+ return Matched;
+}
+
/// \brief Matches if the given method declaration is virtual.
///
/// Given
Index: lib/AST/ASTContext.cpp
===================================================================
--- lib/AST/ASTContext.cpp
+++ lib/AST/ASTContext.cpp
@@ -1255,33 +1255,36 @@
ASTContext::overridden_cxx_method_iterator
ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const {
llvm::DenseMap::const_iterator Pos
- = OverriddenMethods.find(Method->getCanonicalDecl());
+ = OverriddenMethods.find(Method->getCanonicalDecl());
if (Pos == OverriddenMethods.end())
return nullptr;
-
return Pos->second.begin();
}
ASTContext::overridden_cxx_method_iterator
ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const {
llvm::DenseMap::const_iterator Pos
- = OverriddenMethods.find(Method->getCanonicalDecl());
+ = OverriddenMethods.find(Method->getCanonicalDecl());
if (Pos == OverriddenMethods.end())
return nullptr;
-
return Pos->second.end();
}
unsigned
ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const {
llvm::DenseMap::const_iterator Pos
- = OverriddenMethods.find(Method->getCanonicalDecl());
+ = OverriddenMethods.find(Method->getCanonicalDecl());
if (Pos == OverriddenMethods.end())
return 0;
-
return Pos->second.size();
}
+ASTContext::overridden_method_range
+ASTContext::overridden_methods(const CXXMethodDecl *Method) const {
+ return overridden_method_range(overridden_methods_begin(Method),
+ overridden_methods_end(Method));
+}
+
void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method,
const CXXMethodDecl *Overridden) {
assert(Method->isCanonicalDecl() && Overridden->isCanonicalDecl());
Index: lib/AST/DeclCXX.cpp
===================================================================
--- lib/AST/DeclCXX.cpp
+++ lib/AST/DeclCXX.cpp
@@ -1632,6 +1632,13 @@
return getASTContext().overridden_methods_size(this);
}
+CXXMethodDecl::overridden_method_range
+CXXMethodDecl::overridden_methods() const {
+ if (isa(this))
+ return overridden_method_range(nullptr, nullptr);
+ return getASTContext().overridden_methods(this);
+}
+
QualType CXXMethodDecl::getThisType(ASTContext &C) const {
// C++ 9.3.2p1: The type of this in a member function of a class X is X*.
// If the member function is declared const, the type of this is const X*,
Index: unittests/ASTMatchers/ASTMatchersTraversalTest.cpp
===================================================================
--- unittests/ASTMatchers/ASTMatchersTraversalTest.cpp
+++ unittests/ASTMatchers/ASTMatchersTraversalTest.cpp
@@ -1975,5 +1975,49 @@
EXPECT_TRUE(notMatches(CppString2, returnStmt(forFunction(hasName("F")))));
}
+TEST(Matcher, ForEachOverriden) {
+ const auto ForEachOverriddenInClass = [](const char *ClassName) {
+ return cxxMethodDecl(ofClass(hasName(ClassName)), isVirtual(),
+ forEachOverridden(cxxMethodDecl().bind("overridden")))
+ .bind("override");
+ };
+ constexpr const char Code1[] = "class A { virtual void f(); };"
+ "class B : public A { void f(); };"
+ "class C : public B { void f(); };";
+ // C::f overrides A::f.
+ EXPECT_TRUE(matchAndVerifyResultTrue(
+ Code1, ForEachOverriddenInClass("C"),
+ llvm::make_unique>("override", "f", 1)));
+ EXPECT_TRUE(matchAndVerifyResultTrue(
+ Code1, ForEachOverriddenInClass("C"),
+ llvm::make_unique>("overridden", "f",
+ 1)));
+ // B::f overrides A::f.
+ EXPECT_TRUE(matchAndVerifyResultTrue(
+ Code1, ForEachOverriddenInClass("B"),
+ llvm::make_unique>("override", "f", 1)));
+ EXPECT_TRUE(matchAndVerifyResultTrue(
+ Code1, ForEachOverriddenInClass("B"),
+ llvm::make_unique>("overridden", "f",
+ 1)));
+ // A::f overrides nothing.
+ EXPECT_TRUE(notMatches(Code1, ForEachOverriddenInClass("A")));
+
+ constexpr const char Code2[] =
+ "class A1 { virtual void f(); };"
+ "class A2 { virtual void f(); };"
+ "class B : public A1, public A2 { void f(); };";
+ // B::f overrides A1::f and A2::f. This produces two matches.
+ EXPECT_TRUE(matchAndVerifyResultTrue(
+ Code2, ForEachOverriddenInClass("B"),
+ llvm::make_unique>("override", "f", 2)));
+ EXPECT_TRUE(matchAndVerifyResultTrue(
+ Code2, ForEachOverriddenInClass("B"),
+ llvm::make_unique>("overridden", "f",
+ 2)));
+ // A1::f overrides nothing.
+ EXPECT_TRUE(notMatches(Code2, ForEachOverriddenInClass("A1")));
+}
+
} // namespace ast_matchers
} // namespace clang
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