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
23using ::clang::BindingDecl;
24using ::clang::ast_matchers::bindingDecl;
25using ::clang::ast_matchers::hasName;
26using ::clang::ast_matchers::match;
27using ::clang::ast_matchers::selectFirst;
28
29TEST(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 BoundTo: "FunctionPointer",
50 Results: match(Matcher: bindingDecl(hasName(Name: "FunctionPointer")).bind(ID: "FunctionPointer"),
51 Context&: 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(DeclaredType: clang::QualType(), Binding: nullptr);
58 EXPECT_EQ(BD->getFunctionType(), nullptr);
59}
60

source code of clang/unittests/AST/DeclBaseTest.cpp