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//===- unittests/AST/AttrTests.cpp --- Attribute tests --------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "clang/AST/Attr.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "clang/Basic/AttrKinds.h"
#include "clang/Tooling/Tooling.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
using namespace clang;
namespace {
using clang::ast_matchers::constantExpr;
using clang::ast_matchers::equals;
using clang::ast_matchers::functionDecl;
using clang::ast_matchers::has;
using clang::ast_matchers::hasDescendant;
using clang::ast_matchers::hasName;
using clang::ast_matchers::integerLiteral;
using clang::ast_matchers::match;
using clang::ast_matchers::selectFirst;
using clang::ast_matchers::stringLiteral;
using clang::ast_matchers::varDecl;
using clang::tooling::buildASTFromCode;
using clang::tooling::buildASTFromCodeWithArgs;
TEST(Attr, Doc) {
EXPECT_THAT(Attr::getDocumentation(attr::Used).str(),
testing::HasSubstr("The compiler must emit the definition even "
"if it appears to be unused"));
}
const FunctionDecl *getFunctionNode(ASTUnit *AST, const std::string &Name) {
auto Result =
match(functionDecl(hasName(Name)).bind("fn"), AST->getASTContext());
EXPECT_EQ(Result.size(), 1u);
return Result[0].getNodeAs<FunctionDecl>("fn");
}
const VarDecl *getVariableNode(ASTUnit *AST, const std::string &Name) {
auto Result = match(varDecl(hasName(Name)).bind("var"), AST->getASTContext());
EXPECT_EQ(Result.size(), 1u);
return Result[0].getNodeAs<VarDecl>("var");
}
template <class ModifiedTypeLoc>
void AssertAnnotatedAs(TypeLoc TL, llvm::StringRef annotation,
ModifiedTypeLoc &ModifiedTL,
const AnnotateTypeAttr **AnnotateOut = nullptr) {
const auto AttributedTL = TL.getAs<AttributedTypeLoc>();
ASSERT_FALSE(AttributedTL.isNull());
ModifiedTL = AttributedTL.getModifiedLoc().getAs<ModifiedTypeLoc>();
ASSERT_TRUE(ModifiedTL);
ASSERT_NE(AttributedTL.getAttr(), nullptr);
const auto *Annotate = dyn_cast<AnnotateTypeAttr>(AttributedTL.getAttr());
ASSERT_NE(Annotate, nullptr);
EXPECT_EQ(Annotate->getAnnotation(), annotation);
if (AnnotateOut) {
*AnnotateOut = Annotate;
}
}
TEST(Attr, AnnotateType) {
// Test that the AnnotateType attribute shows up in the right places and that
// it stores its arguments correctly.
auto AST = buildASTFromCode(R"cpp(
void f(int* [[clang::annotate_type("foo", "arg1", 2)]] *,
int [[clang::annotate_type("bar")]]);
int [[clang::annotate_type("int")]] * [[clang::annotate_type("ptr")]]
array[10] [[clang::annotate_type("arr")]];
void (* [[clang::annotate_type("funcptr")]] fp)(void);
struct S { int mem; };
int [[clang::annotate_type("int")]]
S::* [[clang::annotate_type("ptr_to_mem")]] ptr_to_member = &S::mem;
)cpp");
{
const FunctionDecl *Func = getFunctionNode(AST.get(), "f");
// First parameter.
const auto PointerTL = Func->getParamDecl(0)
->getTypeSourceInfo()
->getTypeLoc()
.getAs<PointerTypeLoc>();
ASSERT_FALSE(PointerTL.isNull());
PointerTypeLoc PointerPointerTL;
const AnnotateTypeAttr *Annotate;
AssertAnnotatedAs(PointerTL.getPointeeLoc(), "foo", PointerPointerTL,
&Annotate);
EXPECT_EQ(Annotate->args_size(), 2u);
const auto *StringLit = selectFirst<StringLiteral>(
"str", match(constantExpr(hasDescendant(stringLiteral().bind("str"))),
*Annotate->args_begin()[0], AST->getASTContext()));
ASSERT_NE(StringLit, nullptr);
EXPECT_EQ(StringLit->getString(), "arg1");
EXPECT_EQ(match(constantExpr(has(integerLiteral(equals(2u)).bind("int"))),
*Annotate->args_begin()[1], AST->getASTContext())
.size(),
1u);
// Second parameter.
BuiltinTypeLoc IntTL;
AssertAnnotatedAs(Func->getParamDecl(1)->getTypeSourceInfo()->getTypeLoc(),
"bar", IntTL);
EXPECT_EQ(IntTL.getType(), AST->getASTContext().IntTy);
}
{
const VarDecl *Var = getVariableNode(AST.get(), "array");
ArrayTypeLoc ArrayTL;
AssertAnnotatedAs(Var->getTypeSourceInfo()->getTypeLoc(), "arr", ArrayTL);
PointerTypeLoc PointerTL;
AssertAnnotatedAs(ArrayTL.getElementLoc(), "ptr", PointerTL);
BuiltinTypeLoc IntTL;
AssertAnnotatedAs(PointerTL.getPointeeLoc(), "int", IntTL);
EXPECT_EQ(IntTL.getType(), AST->getASTContext().IntTy);
}
{
const VarDecl *Var = getVariableNode(AST.get(), "fp");
PointerTypeLoc PointerTL;
AssertAnnotatedAs(Var->getTypeSourceInfo()->getTypeLoc(), "funcptr",
PointerTL);
ASSERT_TRUE(
PointerTL.getPointeeLoc().IgnoreParens().getAs<FunctionTypeLoc>());
}
{
const VarDecl *Var = getVariableNode(AST.get(), "ptr_to_member");
MemberPointerTypeLoc MemberPointerTL;
AssertAnnotatedAs(Var->getTypeSourceInfo()->getTypeLoc(), "ptr_to_mem",
MemberPointerTL);
BuiltinTypeLoc IntTL;
AssertAnnotatedAs(MemberPointerTL.getPointeeLoc(), "int", IntTL);
EXPECT_EQ(IntTL.getType(), AST->getASTContext().IntTy);
}
// Test type annotation on an `__auto_type` type in C mode.
AST = buildASTFromCodeWithArgs(R"c(
__auto_type [[clang::annotate_type("auto")]] auto_var = 1;
)c",
{"-fdouble-square-bracket-attributes"},
"input.c");
{
const VarDecl *Var = getVariableNode(AST.get(), "auto_var");
AutoTypeLoc AutoTL;
AssertAnnotatedAs(Var->getTypeSourceInfo()->getTypeLoc(), "auto", AutoTL);
}
}
} // namespace
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