| 1 | //===- unittest/Tooling/RecursiveASTVisitorTests/ConstructExpr.cpp --------===// |
|---|
| 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 | #include "TestVisitor.h" |
|---|
| 10 | |
|---|
| 11 | using namespace clang; |
|---|
| 12 | |
|---|
| 13 | namespace { |
|---|
| 14 | |
|---|
| 15 | /// \brief A visitor that optionally includes implicit code and matches |
|---|
| 16 | /// CXXConstructExpr. |
|---|
| 17 | /// |
|---|
| 18 | /// The name recorded for the match is the name of the class whose constructor |
|---|
| 19 | /// is invoked by the CXXConstructExpr, not the name of the class whose |
|---|
| 20 | /// constructor the CXXConstructExpr is contained in. |
|---|
| 21 | class ConstructExprVisitor : public ExpectedLocationVisitor { |
|---|
| 22 | public: |
|---|
| 23 | ConstructExprVisitor() { ShouldVisitImplicitCode = false; } |
|---|
| 24 | |
|---|
| 25 | bool VisitCXXConstructExpr(CXXConstructExpr *Expr) override { |
|---|
| 26 | if (const CXXConstructorDecl* Ctor = Expr->getConstructor()) { |
|---|
| 27 | if (const CXXRecordDecl* Class = Ctor->getParent()) { |
|---|
| 28 | Match(Name: Class->getName(), Location: Expr->getLocation()); |
|---|
| 29 | } |
|---|
| 30 | } |
|---|
| 31 | return true; |
|---|
| 32 | } |
|---|
| 33 | }; |
|---|
| 34 | |
|---|
| 35 | TEST(RecursiveASTVisitor, CanVisitImplicitMemberInitializations) { |
|---|
| 36 | ConstructExprVisitor Visitor; |
|---|
| 37 | Visitor.ShouldVisitImplicitCode = true; |
|---|
| 38 | Visitor.ExpectMatch("WithCtor" , 2, 8); |
|---|
| 39 | // Simple has a constructor that implicitly initializes 'w'. Test |
|---|
| 40 | // that a visitor that visits implicit code visits that initialization. |
|---|
| 41 | // Note: Clang lazily instantiates implicit declarations, so we need |
|---|
| 42 | // to use them in order to force them to appear in the AST. |
|---|
| 43 | EXPECT_TRUE(Visitor.runOver( |
|---|
| 44 | "struct WithCtor { WithCtor(); }; \n" |
|---|
| 45 | "struct Simple { WithCtor w; }; \n" |
|---|
| 46 | "int main() { Simple s; }\n" )); |
|---|
| 47 | } |
|---|
| 48 | |
|---|
| 49 | // The same as CanVisitImplicitMemberInitializations, but checking that the |
|---|
| 50 | // visits are omitted when the visitor does not include implicit code. |
|---|
| 51 | TEST(RecursiveASTVisitor, CanSkipImplicitMemberInitializations) { |
|---|
| 52 | ConstructExprVisitor Visitor; |
|---|
| 53 | Visitor.ShouldVisitImplicitCode = false; |
|---|
| 54 | Visitor.DisallowMatch("WithCtor" , 2, 8); |
|---|
| 55 | // Simple has a constructor that implicitly initializes 'w'. Test |
|---|
| 56 | // that a visitor that skips implicit code skips that initialization. |
|---|
| 57 | // Note: Clang lazily instantiates implicit declarations, so we need |
|---|
| 58 | // to use them in order to force them to appear in the AST. |
|---|
| 59 | EXPECT_TRUE(Visitor.runOver( |
|---|
| 60 | "struct WithCtor { WithCtor(); }; \n" |
|---|
| 61 | "struct Simple { WithCtor w; }; \n" |
|---|
| 62 | "int main() { Simple s; }\n" )); |
|---|
| 63 | } |
|---|
| 64 | |
|---|
| 65 | } // end anonymous namespace |
|---|
| 66 | |
|---|
