106 lines
3.1 KiB
C++
106 lines
3.1 KiB
C++
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//===- unittest/AST/RecursiveASTVisitorTest.cpp ---------------------------===//
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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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#include "clang/AST/RecursiveASTVisitor.h"
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#include "clang/AST/ASTConsumer.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/Attr.h"
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#include "clang/Frontend/FrontendAction.h"
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#include "clang/Tooling/Tooling.h"
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#include "llvm/ADT/FunctionExtras.h"
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#include "llvm/ADT/STLExtras.h"
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include <cassert>
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using namespace clang;
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using ::testing::ElementsAre;
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namespace {
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class ProcessASTAction : public clang::ASTFrontendAction {
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public:
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ProcessASTAction(llvm::unique_function<void(clang::ASTContext &)> Process)
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: Process(std::move(Process)) {
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assert(this->Process);
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}
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std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &CI,
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StringRef InFile) {
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class Consumer : public ASTConsumer {
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public:
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Consumer(llvm::function_ref<void(ASTContext &CTx)> Process)
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: Process(Process) {}
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void HandleTranslationUnit(ASTContext &Ctx) override { Process(Ctx); }
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private:
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llvm::function_ref<void(ASTContext &CTx)> Process;
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};
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return std::make_unique<Consumer>(Process);
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}
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private:
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llvm::unique_function<void(clang::ASTContext &)> Process;
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};
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enum class VisitEvent {
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StartTraverseFunction,
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EndTraverseFunction,
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StartTraverseAttr,
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EndTraverseAttr
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};
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class CollectInterestingEvents
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: public RecursiveASTVisitor<CollectInterestingEvents> {
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public:
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bool TraverseFunctionDecl(FunctionDecl *D) {
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Events.push_back(VisitEvent::StartTraverseFunction);
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bool Ret = RecursiveASTVisitor::TraverseFunctionDecl(D);
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Events.push_back(VisitEvent::EndTraverseFunction);
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return Ret;
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}
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bool TraverseAttr(Attr *A) {
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Events.push_back(VisitEvent::StartTraverseAttr);
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bool Ret = RecursiveASTVisitor::TraverseAttr(A);
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Events.push_back(VisitEvent::EndTraverseAttr);
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return Ret;
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}
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std::vector<VisitEvent> takeEvents() && { return std::move(Events); }
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private:
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std::vector<VisitEvent> Events;
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};
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std::vector<VisitEvent> collectEvents(llvm::StringRef Code) {
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CollectInterestingEvents Visitor;
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clang::tooling::runToolOnCode(
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std::make_unique<ProcessASTAction>(
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[&](clang::ASTContext &Ctx) { Visitor.TraverseAST(Ctx); }),
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Code);
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return std::move(Visitor).takeEvents();
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}
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} // namespace
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TEST(RecursiveASTVisitorTest, AttributesInsideDecls) {
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/// Check attributes are traversed inside TraverseFunctionDecl.
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llvm::StringRef Code = R"cpp(
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__attribute__((annotate("something"))) int foo() { return 10; }
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)cpp";
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EXPECT_THAT(collectEvents(Code),
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ElementsAre(VisitEvent::StartTraverseFunction,
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VisitEvent::StartTraverseAttr,
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VisitEvent::EndTraverseAttr,
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VisitEvent::EndTraverseFunction));
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}
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