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//===--- UseToStringCheck.cpp - clang-tidy---------------------------------===//
//
// 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 "UseToStringCheck.h"
using namespace clang::ast_matchers;
namespace clang {
namespace tidy {
namespace boost {
namespace {
AST_MATCHER(Type, isStrictlyInteger) {
return Node.isIntegerType() && !Node.isAnyCharacterType() &&
!Node.isBooleanType();
}
} // namespace
void UseToStringCheck::registerMatchers(MatchFinder *Finder) {
Finder->addMatcher(
callExpr(
hasDeclaration(functionDecl(
returns(hasDeclaration(classTemplateSpecializationDecl(
hasName("std::basic_string"),
hasTemplateArgument(0,
templateArgument().bind("char_type"))))),
hasName("boost::lexical_cast"),
hasParameter(0, hasType(qualType(has(substTemplateTypeParmType(
isStrictlyInteger()))))))),
argumentCountIs(1), unless(isInTemplateInstantiation()))
.bind("to_string"),
this);
}
void UseToStringCheck::check(const MatchFinder::MatchResult &Result) {
const auto *Call = Result.Nodes.getNodeAs<CallExpr>("to_string");
auto CharType =
Result.Nodes.getNodeAs<TemplateArgument>("char_type")->getAsType();
StringRef StringType;
if (CharType->isSpecificBuiltinType(BuiltinType::Char_S) ||
CharType->isSpecificBuiltinType(BuiltinType::Char_U))
StringType = "string";
else if (CharType->isSpecificBuiltinType(BuiltinType::WChar_S) ||
CharType->isSpecificBuiltinType(BuiltinType::WChar_U))
StringType = "wstring";
else
return;
auto Loc = Call->getBeginLoc();
auto Diag =
diag(Loc, "use std::to_%0 instead of boost::lexical_cast<std::%0>")
<< StringType;
if (Loc.isMacroID())
return;
Diag << FixItHint::CreateReplacement(
CharSourceRange::getCharRange(Call->getBeginLoc(),
Call->getArg(0)->getBeginLoc()),
(llvm::Twine("std::to_") + StringType + "(").str());
}
} // namespace boost
} // namespace tidy
} // namespace clang
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