1 //===- unittests/AST/DeclBaseTest.cpp --- Declaration tests----------------===// 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 // Unit tests for Decl class in the AST. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "clang/AST/DeclBase.h" 14 #include "clang/AST/ASTContext.h" 15 #include "clang/AST/DeclCXX.h" 16 #include "clang/AST/Type.h" 17 #include "clang/ASTMatchers/ASTMatchFinder.h" 18 #include "clang/ASTMatchers/ASTMatchers.h" 19 #include "clang/Basic/LLVM.h" 20 #include "clang/Tooling/Tooling.h" 21 #include "gtest/gtest.h" 22 23 using ::clang::BindingDecl; 24 using ::clang::ast_matchers::bindingDecl; 25 using ::clang::ast_matchers::hasName; 26 using ::clang::ast_matchers::match; 27 using ::clang::ast_matchers::selectFirst; 28 29 TEST(DeclGetFunctionType, BindingDecl) { 30 llvm::StringRef Code = R"cpp( 31 template <typename A, typename B> 32 struct Pair { 33 A AnA; 34 B AB; 35 }; 36 37 void target(int *i) { 38 Pair<void (*)(int *), bool> P; 39 auto [FunctionPointer, B] = P; 40 FunctionPointer(i); 41 } 42 )cpp"; 43 44 auto AST = 45 clang::tooling::buildASTFromCodeWithArgs(Code, /*Args=*/{"-std=c++20"}); 46 clang::ASTContext &Ctx = AST->getASTContext(); 47 48 auto *BD = selectFirst<clang::BindingDecl>( 49 "FunctionPointer", 50 match(bindingDecl(hasName("FunctionPointer")).bind("FunctionPointer"), 51 Ctx)); 52 ASSERT_NE(BD, nullptr); 53 54 EXPECT_NE(BD->getFunctionType(), nullptr); 55 56 // Emulate a call before the BindingDecl has a bound type. 57 const_cast<clang::BindingDecl *>(BD)->setBinding(clang::QualType(), nullptr); 58 EXPECT_EQ(BD->getFunctionType(), nullptr); 59 } 60