2018-04-20 02:19:02 +08:00
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//===- unittest/Tooling/RecursiveASTVisitorTests/DeclRefExpr.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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using namespace clang;
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namespace {
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class DeclRefExprVisitor : public ExpectedLocationVisitor<DeclRefExprVisitor> {
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public:
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DeclRefExprVisitor() : ShouldVisitImplicitCode(false) {}
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bool shouldVisitImplicitCode() const { return ShouldVisitImplicitCode; }
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void setShouldVisitImplicitCode(bool NewValue) {
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ShouldVisitImplicitCode = NewValue;
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}
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bool VisitDeclRefExpr(DeclRefExpr *Reference) {
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Match(Reference->getNameInfo().getAsString(), Reference->getLocation());
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return true;
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}
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private:
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bool ShouldVisitImplicitCode;
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};
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TEST(RecursiveASTVisitor, VisitsBaseClassTemplateArguments) {
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DeclRefExprVisitor Visitor;
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Visitor.ExpectMatch("x", 2, 3);
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EXPECT_TRUE(Visitor.runOver(
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"void x(); template <void (*T)()> class X {};\nX<x> y;"));
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}
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TEST(RecursiveASTVisitor, VisitsCXXForRangeStmtRange) {
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DeclRefExprVisitor Visitor;
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Visitor.ExpectMatch("x", 2, 25);
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Visitor.ExpectMatch("x", 2, 30);
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EXPECT_TRUE(Visitor.runOver(
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"int x[5];\n"
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"void f() { for (int i : x) { x[0] = 1; } }",
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DeclRefExprVisitor::Lang_CXX11));
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}
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TEST(RecursiveASTVisitor, VisitsCallExpr) {
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DeclRefExprVisitor Visitor;
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Visitor.ExpectMatch("x", 1, 22);
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EXPECT_TRUE(Visitor.runOver(
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"void x(); void y() { x(); }"));
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}
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TEST(RecursiveASTVisitor, VisitsExplicitLambdaCaptureInit) {
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DeclRefExprVisitor Visitor;
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Visitor.ExpectMatch("i", 1, 20);
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EXPECT_TRUE(Visitor.runOver(
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"void f() { int i; [i]{}; }",
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DeclRefExprVisitor::Lang_CXX11));
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}
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TEST(RecursiveASTVisitor, VisitsUseOfImplicitLambdaCapture) {
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DeclRefExprVisitor Visitor;
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Visitor.ExpectMatch("i", 1, 24);
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EXPECT_TRUE(Visitor.runOver(
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"void f() { int i; [=]{ i; }; }",
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DeclRefExprVisitor::Lang_CXX11));
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}
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TEST(RecursiveASTVisitor, VisitsImplicitLambdaCaptureInit) {
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DeclRefExprVisitor Visitor;
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Visitor.setShouldVisitImplicitCode(true);
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2018-09-14 07:28:25 +08:00
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// We're expecting "i" to be visited twice: once for the initialization expr
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// for the captured variable "i" outside of the lambda body, and again for
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// the use of "i" inside the lambda.
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Visitor.ExpectMatch("i", 1, 20, /*Times=*/1);
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Visitor.ExpectMatch("i", 1, 24, /*Times=*/1);
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2018-04-20 02:19:02 +08:00
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EXPECT_TRUE(Visitor.runOver(
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"void f() { int i; [=]{ i; }; }",
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DeclRefExprVisitor::Lang_CXX11));
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}
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TEST(RecursiveASTVisitor, VisitsLambdaInitCaptureInit) {
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DeclRefExprVisitor Visitor;
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Visitor.ExpectMatch("i", 1, 24);
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EXPECT_TRUE(Visitor.runOver(
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"void f() { int i; [a = i + 1]{}; }",
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DeclRefExprVisitor::Lang_CXX14));
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}
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/* FIXME: According to Richard Smith this is a bug in the AST.
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TEST(RecursiveASTVisitor, VisitsBaseClassTemplateArgumentsInInstantiation) {
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DeclRefExprVisitor Visitor;
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Visitor.ExpectMatch("x", 3, 43);
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EXPECT_TRUE(Visitor.runOver(
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"template <typename T> void x();\n"
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"template <void (*T)()> class X {};\n"
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"template <typename T> class Y : public X< x<T> > {};\n"
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"Y<int> y;"));
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}
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*/
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TEST(RecursiveASTVisitor, VisitsExtension) {
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DeclRefExprVisitor Visitor;
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Visitor.ExpectMatch("s", 1, 24);
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EXPECT_TRUE(Visitor.runOver(
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"int s = __extension__ (s);\n"));
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}
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TEST(RecursiveASTVisitor, VisitsCopyExprOfBlockDeclCapture) {
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DeclRefExprVisitor Visitor;
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Visitor.ExpectMatch("x", 3, 24);
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EXPECT_TRUE(Visitor.runOver("void f(int(^)(int)); \n"
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"void g() { \n"
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" f([&](int x){ return x; }); \n"
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"}",
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DeclRefExprVisitor::Lang_OBJCXX11));
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}
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} // end anonymous namespace
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