121 lines
4.5 KiB
C++
121 lines
4.5 KiB
C++
//===- unittest/AST/ASTContextParentMapTest.cpp - AST parent map test -----===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Tests for the getParents(...) methods of ASTContext.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/ASTContext.h"
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#include "MatchVerifier.h"
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#include "clang/ASTMatchers/ASTMatchFinder.h"
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#include "clang/ASTMatchers/ASTMatchers.h"
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#include "clang/Tooling/Tooling.h"
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#include "gtest/gtest.h"
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#include "gmock/gmock.h"
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using testing::ElementsAre;
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namespace clang {
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namespace ast_matchers {
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TEST(GetParents, ReturnsParentForDecl) {
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MatchVerifier<Decl> Verifier;
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EXPECT_TRUE(
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Verifier.match("class C { void f(); };",
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cxxMethodDecl(hasParent(recordDecl(hasName("C"))))));
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}
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TEST(GetParents, ReturnsParentForStmt) {
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MatchVerifier<Stmt> Verifier;
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EXPECT_TRUE(Verifier.match("class C { void f() { if (true) {} } };",
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ifStmt(hasParent(compoundStmt()))));
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}
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TEST(GetParents, ReturnsParentForTypeLoc) {
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MatchVerifier<TypeLoc> Verifier;
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EXPECT_TRUE(
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Verifier.match("namespace a { class b {}; } void f(a::b) {}",
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typeLoc(hasParent(typeLoc(hasParent(functionDecl()))))));
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}
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TEST(GetParents, ReturnsParentForNestedNameSpecifierLoc) {
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MatchVerifier<NestedNameSpecifierLoc> Verifier;
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EXPECT_TRUE(Verifier.match("namespace a { class b {}; } void f(a::b) {}",
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nestedNameSpecifierLoc(hasParent(typeLoc()))));
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}
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TEST(GetParents, ReturnsParentInsideTemplateInstantiations) {
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MatchVerifier<Decl> DeclVerifier;
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EXPECT_TRUE(DeclVerifier.match(
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"template<typename T> struct C { void f() {} };"
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"void g() { C<int> c; c.f(); }",
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cxxMethodDecl(hasName("f"),
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hasParent(cxxRecordDecl(isTemplateInstantiation())))));
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EXPECT_TRUE(DeclVerifier.match(
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"template<typename T> struct C { void f() {} };"
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"void g() { C<int> c; c.f(); }",
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cxxMethodDecl(hasName("f"),
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hasParent(cxxRecordDecl(unless(isTemplateInstantiation()))))));
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EXPECT_FALSE(DeclVerifier.match(
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"template<typename T> struct C { void f() {} };"
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"void g() { C<int> c; c.f(); }",
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cxxMethodDecl(
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hasName("f"),
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allOf(hasParent(cxxRecordDecl(unless(isTemplateInstantiation()))),
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hasParent(cxxRecordDecl(isTemplateInstantiation()))))));
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}
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TEST(GetParents, ReturnsMultipleParentsInTemplateInstantiations) {
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MatchVerifier<Stmt> TemplateVerifier;
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EXPECT_TRUE(TemplateVerifier.match(
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"template<typename T> struct C { void f() {} };"
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"void g() { C<int> c; c.f(); }",
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compoundStmt(allOf(
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hasAncestor(cxxRecordDecl(isTemplateInstantiation())),
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hasAncestor(cxxRecordDecl(unless(isTemplateInstantiation())))))));
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}
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TEST(GetParents, RespectsTraversalScope) {
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auto AST =
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tooling::buildASTFromCode("struct foo { int bar; };", "foo.cpp",
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std::make_shared<PCHContainerOperations>());
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auto &Ctx = AST->getASTContext();
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auto &TU = *Ctx.getTranslationUnitDecl();
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auto &Foo = *TU.lookup(&Ctx.Idents.get("foo")).front();
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auto &Bar = *cast<DeclContext>(Foo).lookup(&Ctx.Idents.get("bar")).front();
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using ast_type_traits::DynTypedNode;
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// Initially, scope is the whole TU.
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EXPECT_THAT(Ctx.getParents(Bar), ElementsAre(DynTypedNode::create(Foo)));
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EXPECT_THAT(Ctx.getParents(Foo), ElementsAre(DynTypedNode::create(TU)));
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// Restrict the scope, now some parents are gone.
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Ctx.setTraversalScope({&Foo});
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EXPECT_THAT(Ctx.getParents(Bar), ElementsAre(DynTypedNode::create(Foo)));
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EXPECT_THAT(Ctx.getParents(Foo), ElementsAre());
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// Reset the scope, we get back the original results.
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Ctx.setTraversalScope({&TU});
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EXPECT_THAT(Ctx.getParents(Bar), ElementsAre(DynTypedNode::create(Foo)));
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EXPECT_THAT(Ctx.getParents(Foo), ElementsAre(DynTypedNode::create(TU)));
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}
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TEST(GetParents, ImplicitLambdaNodes) {
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MatchVerifier<Decl> LambdaVerifier;
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EXPECT_TRUE(LambdaVerifier.match(
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"auto x = []{int y;};",
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varDecl(hasName("y"), hasAncestor(functionDecl(
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hasOverloadedOperatorName("()"),
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hasParent(cxxRecordDecl(
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isImplicit(), hasParent(lambdaExpr())))))),
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Lang_CXX11));
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}
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} // end namespace ast_matchers
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} // end namespace clang
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