| 1 | //===- unittest/Tooling/RecursiveASTVisitorTests/DeductionGuide.cpp -------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "TestVisitor.h" |
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| 10 | #include <string> |
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| 11 | |
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| 12 | using namespace clang; |
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| 13 | |
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| 14 | namespace { |
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| 15 | |
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| 16 | class DeductionGuideVisitor : public ExpectedLocationVisitor { |
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| 17 | public: |
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| 18 | DeductionGuideVisitor(bool VisitImplicitCode) { |
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| 19 | ShouldVisitImplicitCode = VisitImplicitCode; |
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| 20 | ShouldVisitTemplateInstantiations = false; |
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| 21 | } |
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| 22 | |
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| 23 | bool VisitCXXDeductionGuideDecl(CXXDeductionGuideDecl *D) override { |
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| 24 | std::string Storage; |
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| 25 | llvm::raw_string_ostream Stream(Storage); |
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| 26 | D->print(Stream); |
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| 27 | Match(Name: Storage, Location: D->getLocation()); |
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| 28 | return true; |
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| 29 | } |
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| 30 | }; |
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| 31 | |
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| 32 | TEST(RecursiveASTVisitor, DeductionGuideNonImplicitMode) { |
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| 33 | DeductionGuideVisitor Visitor(/*ShouldVisitImplicitCode*/ false); |
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| 34 | // Verify that the synthezied deduction guide for alias is not visited in |
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| 35 | // RAV's implicit mode. |
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| 36 | Visitor.ExpectMatch("Foo(T) -> Foo<int>" , 11, 1); |
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| 37 | Visitor.DisallowMatch("Bar(T) -> Foo<int>" , 14, 1); |
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| 38 | EXPECT_TRUE(Visitor.runOver( |
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| 39 | R"cpp( |
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| 40 | template <typename T> |
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| 41 | concept False = true; |
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| 42 | |
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| 43 | template <typename T> |
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| 44 | struct Foo { |
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| 45 | Foo(T); |
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| 46 | }; |
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| 47 | |
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| 48 | template<typename T> requires False<T> |
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| 49 | Foo(T) -> Foo<int>; |
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| 50 | |
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| 51 | template <typename U> |
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| 52 | using Bar = Foo<U>; |
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| 53 | Bar s(1); |
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| 54 | )cpp" , |
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| 55 | DeductionGuideVisitor::Lang_CXX2a)); |
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| 56 | } |
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| 57 | |
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| 58 | TEST(RecursiveASTVisitor, DeductionGuideImplicitMode) { |
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| 59 | DeductionGuideVisitor Visitor(/*ShouldVisitImplicitCode*/ true); |
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| 60 | Visitor.ExpectMatch("Foo(T) -> Foo<int>" , 11, 1); |
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| 61 | Visitor.ExpectMatch("Bar(T) -> Foo<int>" , 14, 1); |
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| 62 | EXPECT_TRUE(Visitor.runOver( |
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| 63 | R"cpp( |
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| 64 | template <typename T> |
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| 65 | concept False = true; |
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| 66 | |
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| 67 | template <typename T> |
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| 68 | struct Foo { |
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| 69 | Foo(T); |
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| 70 | }; |
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| 71 | |
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| 72 | template<typename T> requires False<T> |
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| 73 | Foo(T) -> Foo<int>; |
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| 74 | |
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| 75 | template <typename U> |
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| 76 | using Bar = Foo<U>; |
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| 77 | Bar s(1); |
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| 78 | )cpp" , |
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| 79 | DeductionGuideVisitor::Lang_CXX2a)); |
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| 80 | } |
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| 81 | |
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| 82 | } // end anonymous namespace |
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| 83 | |
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