138 lines
4.0 KiB
C++
138 lines
4.0 KiB
C++
//===- unittest/Tooling/RecursiveASTVisitorTest.cpp -----------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "TestVisitor.h"
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#include <stack>
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using namespace clang;
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namespace {
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class LambdaExprVisitor : public ExpectedLocationVisitor<LambdaExprVisitor> {
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public:
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bool VisitLambdaExpr(LambdaExpr *Lambda) {
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PendingBodies.push(Lambda);
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Match("", Lambda->getIntroducerRange().getBegin());
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return true;
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}
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/// For each call to VisitLambdaExpr, we expect a subsequent call (with
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/// proper nesting) to TraverseLambdaBody.
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bool TraverseLambdaBody(LambdaExpr *Lambda) {
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EXPECT_FALSE(PendingBodies.empty());
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EXPECT_EQ(PendingBodies.top(), Lambda);
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PendingBodies.pop();
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return TraverseStmt(Lambda->getBody());
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}
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/// Determine whether TraverseLambdaBody has been called for every call to
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/// VisitLambdaExpr.
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bool allBodiesHaveBeenTraversed() const {
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return PendingBodies.empty();
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}
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private:
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std::stack<LambdaExpr *> PendingBodies;
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};
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TEST(RecursiveASTVisitor, VisitsLambdaExpr) {
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LambdaExprVisitor Visitor;
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Visitor.ExpectMatch("", 1, 12);
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EXPECT_TRUE(Visitor.runOver("void f() { []{ return; }(); }",
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LambdaExprVisitor::Lang_CXX11));
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}
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TEST(RecursiveASTVisitor, TraverseLambdaBodyCanBeOverridden) {
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LambdaExprVisitor Visitor;
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EXPECT_TRUE(Visitor.runOver("void f() { []{ return; }(); }",
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LambdaExprVisitor::Lang_CXX11));
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EXPECT_TRUE(Visitor.allBodiesHaveBeenTraversed());
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}
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// Matches the (optional) capture-default of a lambda-introducer.
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class LambdaDefaultCaptureVisitor
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: public ExpectedLocationVisitor<LambdaDefaultCaptureVisitor> {
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public:
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bool VisitLambdaExpr(LambdaExpr *Lambda) {
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if (Lambda->getCaptureDefault() != LCD_None) {
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Match("", Lambda->getCaptureDefaultLoc());
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}
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return true;
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}
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};
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TEST(RecursiveASTVisitor, HasCaptureDefaultLoc) {
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LambdaDefaultCaptureVisitor Visitor;
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Visitor.ExpectMatch("", 1, 20);
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EXPECT_TRUE(Visitor.runOver("void f() { int a; [=]{a;}; }",
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LambdaDefaultCaptureVisitor::Lang_CXX11));
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}
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// Checks for lambda classes that are not marked as implicitly-generated.
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// (There should be none.)
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class ClassVisitor : public ExpectedLocationVisitor<ClassVisitor> {
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public:
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ClassVisitor() : SawNonImplicitLambdaClass(false) {}
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bool VisitCXXRecordDecl(CXXRecordDecl* record) {
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if (record->isLambda() && !record->isImplicit())
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SawNonImplicitLambdaClass = true;
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return true;
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}
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bool sawOnlyImplicitLambdaClasses() const {
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return !SawNonImplicitLambdaClass;
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}
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private:
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bool SawNonImplicitLambdaClass;
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};
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TEST(RecursiveASTVisitor, LambdaClosureTypesAreImplicit) {
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ClassVisitor Visitor;
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EXPECT_TRUE(Visitor.runOver("auto lambda = []{};",
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ClassVisitor::Lang_CXX11));
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EXPECT_TRUE(Visitor.sawOnlyImplicitLambdaClasses());
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}
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// Check to ensure that attributes and expressions within them are being
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// visited.
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class AttrVisitor : public ExpectedLocationVisitor<AttrVisitor> {
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public:
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bool VisitMemberExpr(MemberExpr *ME) {
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Match(ME->getMemberDecl()->getNameAsString(), ME->getLocStart());
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return true;
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}
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bool VisitAttr(Attr *A) {
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Match("Attr", A->getLocation());
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return true;
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}
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bool VisitGuardedByAttr(GuardedByAttr *A) {
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Match("guarded_by", A->getLocation());
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return true;
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}
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};
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TEST(RecursiveASTVisitor, AttributesAreVisited) {
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AttrVisitor Visitor;
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Visitor.ExpectMatch("Attr", 4, 24);
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Visitor.ExpectMatch("guarded_by", 4, 24);
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Visitor.ExpectMatch("mu1", 4, 35);
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Visitor.ExpectMatch("Attr", 5, 29);
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Visitor.ExpectMatch("mu1", 5, 54);
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Visitor.ExpectMatch("mu2", 5, 59);
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EXPECT_TRUE(Visitor.runOver(
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"class Foo {\n"
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" int mu1;\n"
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" int mu2;\n"
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" int a __attribute__((guarded_by(mu1)));\n"
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" void bar() __attribute__((exclusive_locks_required(mu1, mu2)));\n"
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"};\n"));
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}
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} // end anonymous namespace
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