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//===- unittest/Tooling/RecursiveASTVisitorTests/DeductionGuide.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"
#include <string>
using namespace clang;
namespace {
class DeductionGuideVisitor : public ExpectedLocationVisitor {
public:
DeductionGuideVisitor(bool VisitImplicitCode) {
ShouldVisitImplicitCode = VisitImplicitCode;
ShouldVisitTemplateInstantiations = false;
}
bool VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) override {
std::string Storage;
llvm::raw_string_ostream Stream(Storage);
D->print(Stream);
Match(Storage, D->getLocation());
return true;
}
};
TEST(RecursiveASTVisitor, DeductionGuideNonImplicitMode) {
DeductionGuideVisitor Visitor(/*ShouldVisitImplicitCode*/ false);
// Verify that the synthezied deduction guide for alias is not visited in
// RAV's implicit mode.
Visitor.ExpectMatch("Foo(T) -> Foo<int>", 11, 1);
Visitor.DisallowMatch("Bar(T) -> Foo<int>", 14, 1);
EXPECT_TRUE(Visitor.runOver(
R"cpp(
template <typename T>
concept False = true;
template <typename T>
struct Foo {
Foo(T);
};
template<typename T> requires False<T>
Foo(T) -> Foo<int>;
template <typename U>
using Bar = Foo<U>;
Bar s(1);
)cpp",
DeductionGuideVisitor::Lang_CXX2a));
}
TEST(RecursiveASTVisitor, DeductionGuideImplicitMode) {
DeductionGuideVisitor Visitor(/*ShouldVisitImplicitCode*/ true);
Visitor.ExpectMatch("Foo(T) -> Foo<int>", 11, 1);
Visitor.ExpectMatch("Bar(T) -> Foo<int>", 14, 1);
EXPECT_TRUE(Visitor.runOver(
R"cpp(
template <typename T>
concept False = true;
template <typename T>
struct Foo {
Foo(T);
};
template<typename T> requires False<T>
Foo(T) -> Foo<int>;
template <typename U>
using Bar = Foo<U>;
Bar s(1);
)cpp",
DeductionGuideVisitor::Lang_CXX2a));
}
} // end anonymous namespace
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