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//===- unittest/Tooling/RecursiveASTVisitorTests/ConstructExpr.cpp --------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "TestVisitor.h"
using namespace clang;
namespace {
/// \brief A visitor that optionally includes implicit code and matches
/// CXXConstructExpr.
///
/// The name recorded for the match is the name of the class whose constructor
/// is invoked by the CXXConstructExpr, not the name of the class whose
/// constructor the CXXConstructExpr is contained in.
class ConstructExprVisitor
: public ExpectedLocationVisitor<ConstructExprVisitor> {
public:
ConstructExprVisitor() : ShouldVisitImplicitCode(false) {}
bool shouldVisitImplicitCode() const { return ShouldVisitImplicitCode; }
void setShouldVisitImplicitCode(bool NewValue) {
ShouldVisitImplicitCode = NewValue;
}
bool VisitCXXConstructExpr(CXXConstructExpr* Expr) {
if (const CXXConstructorDecl* Ctor = Expr->getConstructor()) {
if (const CXXRecordDecl* Class = Ctor->getParent()) {
Match(Class->getName(), Expr->getLocation());
}
}
return true;
}
private:
bool ShouldVisitImplicitCode;
};
TEST(RecursiveASTVisitor, CanVisitImplicitMemberInitializations) {
ConstructExprVisitor Visitor;
Visitor.setShouldVisitImplicitCode(true);
Visitor.ExpectMatch("WithCtor", 2, 8);
// Simple has a constructor that implicitly initializes 'w'. Test
// that a visitor that visits implicit code visits that initialization.
// Note: Clang lazily instantiates implicit declarations, so we need
// to use them in order to force them to appear in the AST.
EXPECT_TRUE(Visitor.runOver(
"struct WithCtor { WithCtor(); }; \n"
"struct Simple { WithCtor w; }; \n"
"int main() { Simple s; }\n"));
}
// The same as CanVisitImplicitMemberInitializations, but checking that the
// visits are omitted when the visitor does not include implicit code.
TEST(RecursiveASTVisitor, CanSkipImplicitMemberInitializations) {
ConstructExprVisitor Visitor;
Visitor.setShouldVisitImplicitCode(false);
Visitor.DisallowMatch("WithCtor", 2, 8);
// Simple has a constructor that implicitly initializes 'w'. Test
// that a visitor that skips implicit code skips that initialization.
// Note: Clang lazily instantiates implicit declarations, so we need
// to use them in order to force them to appear in the AST.
EXPECT_TRUE(Visitor.runOver(
"struct WithCtor { WithCtor(); }; \n"
"struct Simple { WithCtor w; }; \n"
"int main() { Simple s; }\n"));
}
} // end anonymous namespace
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