DurationFactoryFloatCheck.cpp
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//===--- DurationFactoryFloatCheck.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 "DurationFactoryFloatCheck.h"
#include "DurationRewriter.h"
#include "clang/AST/ASTContext.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/Lex/Lexer.h"
#include "clang/Tooling/FixIt.h"
using namespace clang::ast_matchers;
namespace clang {
namespace tidy {
namespace abseil {
// Returns `true` if `Range` is inside a macro definition.
static bool InsideMacroDefinition(const MatchFinder::MatchResult &Result,
SourceRange Range) {
return !clang::Lexer::makeFileCharRange(
clang::CharSourceRange::getCharRange(Range),
*Result.SourceManager, Result.Context->getLangOpts())
.isValid();
}
void DurationFactoryFloatCheck::registerMatchers(MatchFinder *Finder) {
Finder->addMatcher(
callExpr(callee(functionDecl(DurationFactoryFunction())),
hasArgument(0, anyOf(cxxStaticCastExpr(hasDestinationType(
realFloatingPointType())),
cStyleCastExpr(hasDestinationType(
realFloatingPointType())),
cxxFunctionalCastExpr(hasDestinationType(
realFloatingPointType())),
floatLiteral())))
.bind("call"),
this);
}
void DurationFactoryFloatCheck::check(const MatchFinder::MatchResult &Result) {
const auto *MatchedCall = Result.Nodes.getNodeAs<CallExpr>("call");
// Don't try and replace things inside of macro definitions.
if (InsideMacroDefinition(Result, MatchedCall->getSourceRange()))
return;
const Expr *Arg = MatchedCall->getArg(0)->IgnoreImpCasts();
// Arguments which are macros are ignored.
if (Arg->getBeginLoc().isMacroID())
return;
llvm::Optional<std::string> SimpleArg = stripFloatCast(Result, *Arg);
if (!SimpleArg)
SimpleArg = stripFloatLiteralFraction(Result, *Arg);
if (SimpleArg) {
diag(MatchedCall->getBeginLoc(),
(llvm::Twine("use the integer version of absl::") +
MatchedCall->getDirectCallee()->getName())
.str())
<< FixItHint::CreateReplacement(Arg->getSourceRange(), *SimpleArg);
}
}
} // namespace abseil
} // namespace tidy
} // namespace clang