clang/unittests/Tooling/RecursiveASTVisitorTests/ImplicitCtor.cpp

   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 : public ExpectedLocationVisitor {
  17 public:
  18   bool VisitCXXConstructorDecl(CXXConstructorDecl *Ctor) override {
  19     if (Ctor->isImplicit()) {  // Was not written in source code
  20       if (const CXXRecordDecl* Class = Ctor->getParent()) {
  21         Match(Class->getName(), Ctor->getLocation());
  22       }
  23     }
  24     return true;
  25   }
  26 };
  27
  28 TEST(RecursiveASTVisitor, VisitsImplicitCopyConstructors) {
  29   ImplicitCtorVisitor Visitor;
  30   Visitor.ExpectMatch("Simple", 2, 8);
  31   // Note: Clang lazily instantiates implicit declarations, so we need
  32   // to use them in order to force them to appear in the AST.
  33   EXPECT_TRUE(Visitor.runOver(
  34       "struct WithCtor { WithCtor(); }; \n"
  35       "struct Simple { Simple(); WithCtor w; }; \n"
  36       "int main() { Simple s; Simple t(s); }\n"));
  37 }
  38
  39 } // end anonymous namespace