1 //===- unittest/Tooling/RecursiveASTVisitorTests/ImplicitCtor.cpp ---------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "TestVisitor.h"
10 
11 using namespace clang;
12 
13 namespace {
14 
15 // A visitor that visits implicit declarations and matches constructors.
16 class ImplicitCtorVisitor
17     : public ExpectedLocationVisitor<ImplicitCtorVisitor> {
18 public:
shouldVisitImplicitCode() const19   bool shouldVisitImplicitCode() const { return true; }
20 
VisitCXXConstructorDecl(CXXConstructorDecl * Ctor)21   bool VisitCXXConstructorDecl(CXXConstructorDecl* Ctor) {
22     if (Ctor->isImplicit()) {  // Was not written in source code
23       if (const CXXRecordDecl* Class = Ctor->getParent()) {
24         Match(Class->getName(), Ctor->getLocation());
25       }
26     }
27     return true;
28   }
29 };
30 
TEST(RecursiveASTVisitor,VisitsImplicitCopyConstructors)31 TEST(RecursiveASTVisitor, VisitsImplicitCopyConstructors) {
32   ImplicitCtorVisitor Visitor;
33   Visitor.ExpectMatch("Simple", 2, 8);
34   // Note: Clang lazily instantiates implicit declarations, so we need
35   // to use them in order to force them to appear in the AST.
36   EXPECT_TRUE(Visitor.runOver(
37       "struct WithCtor { WithCtor(); }; \n"
38       "struct Simple { Simple(); WithCtor w; }; \n"
39       "int main() { Simple s; Simple t(s); }\n"));
40 }
41 
42 } // end anonymous namespace
43