| 1 | //===- unittest/Tooling/RecursiveASTVisitorTests/ConstructExpr.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 | |
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| 11 | using namespace clang; |
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| 12 | |
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| 13 | namespace { |
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| 14 | |
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| 15 | /// \brief A visitor that optionally includes implicit code and matches |
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| 16 | /// CXXConstructExpr. |
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| 17 | /// |
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| 18 | /// The name recorded for the match is the name of the class whose constructor |
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| 19 | /// is invoked by the CXXConstructExpr, not the name of the class whose |
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| 20 | /// constructor the CXXConstructExpr is contained in. |
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| 21 | class ConstructExprVisitor |
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| 22 | : public ExpectedLocationVisitor<ConstructExprVisitor> { |
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| 23 | public: |
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| 24 | ConstructExprVisitor() : ShouldVisitImplicitCode(false) {} |
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| 25 | |
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| 26 | bool shouldVisitImplicitCode() const { return ShouldVisitImplicitCode; } |
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| 27 | |
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| 28 | void setShouldVisitImplicitCode(bool NewValue) { |
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| 29 | ShouldVisitImplicitCode = NewValue; |
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| 30 | } |
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| 31 | |
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| 32 | bool VisitCXXConstructExpr(CXXConstructExpr* Expr) { |
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| 33 | if (const CXXConstructorDecl* Ctor = Expr->getConstructor()) { |
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| 34 | if (const CXXRecordDecl* Class = Ctor->getParent()) { |
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| 35 | Match(Name: Class->getName(), Location: Expr->getLocation()); |
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| 36 | } |
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| 37 | } |
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| 38 | return true; |
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| 39 | } |
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| 40 | |
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| 41 | private: |
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| 42 | bool ShouldVisitImplicitCode; |
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| 43 | }; |
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| 44 | |
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| 45 | TEST(RecursiveASTVisitor, CanVisitImplicitMemberInitializations) { |
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| 46 | ConstructExprVisitor Visitor; |
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| 47 | Visitor.setShouldVisitImplicitCode(true); |
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| 48 | Visitor.ExpectMatch(Match: "WithCtor" , Line: 2, Column: 8); |
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| 49 | // Simple has a constructor that implicitly initializes 'w'. Test |
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| 50 | // that a visitor that visits implicit code visits that initialization. |
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| 51 | // Note: Clang lazily instantiates implicit declarations, so we need |
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| 52 | // to use them in order to force them to appear in the AST. |
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| 53 | EXPECT_TRUE(Visitor.runOver( |
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| 54 | "struct WithCtor { WithCtor(); }; \n" |
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| 55 | "struct Simple { WithCtor w; }; \n" |
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| 56 | "int main() { Simple s; }\n" )); |
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| 57 | } |
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| 58 | |
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| 59 | // The same as CanVisitImplicitMemberInitializations, but checking that the |
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| 60 | // visits are omitted when the visitor does not include implicit code. |
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| 61 | TEST(RecursiveASTVisitor, CanSkipImplicitMemberInitializations) { |
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| 62 | ConstructExprVisitor Visitor; |
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| 63 | Visitor.setShouldVisitImplicitCode(false); |
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| 64 | Visitor.DisallowMatch(Match: "WithCtor" , Line: 2, Column: 8); |
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| 65 | // Simple has a constructor that implicitly initializes 'w'. Test |
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| 66 | // that a visitor that skips implicit code skips that initialization. |
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| 67 | // Note: Clang lazily instantiates implicit declarations, so we need |
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| 68 | // to use them in order to force them to appear in the AST. |
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| 69 | EXPECT_TRUE(Visitor.runOver( |
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| 70 | "struct WithCtor { WithCtor(); }; \n" |
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| 71 | "struct Simple { WithCtor w; }; \n" |
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| 72 | "int main() { Simple s; }\n" )); |
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| 73 | } |
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| 74 | |
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| 75 | } // end anonymous namespace |
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| 76 | |
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