DurationAdditionCheck.cpp
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//===--- DurationAdditionCheck.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 "DurationAdditionCheck.h"
#include "DurationRewriter.h"
#include "clang/AST/ASTContext.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/Tooling/FixIt.h"
using namespace clang::ast_matchers;
namespace clang {
namespace tidy {
namespace abseil {
void DurationAdditionCheck::registerMatchers(MatchFinder *Finder) {
Finder->addMatcher(
binaryOperator(hasOperatorName("+"),
hasEitherOperand(expr(ignoringParenImpCasts(
callExpr(callee(functionDecl(TimeConversionFunction())
.bind("function_decl")))
.bind("call")))))
.bind("binop"),
this);
}
void DurationAdditionCheck::check(const MatchFinder::MatchResult &Result) {
const BinaryOperator *Binop =
Result.Nodes.getNodeAs<clang::BinaryOperator>("binop");
const CallExpr *Call = Result.Nodes.getNodeAs<clang::CallExpr>("call");
// Don't try to replace things inside of macro definitions.
if (Binop->getExprLoc().isMacroID() || Binop->getExprLoc().isInvalid())
return;
llvm::Optional<DurationScale> Scale = getScaleForTimeInverse(
Result.Nodes.getNodeAs<clang::FunctionDecl>("function_decl")->getName());
if (!Scale)
return;
llvm::StringRef TimeFactory = getTimeInverseForScale(*Scale);
FixItHint Hint;
if (Call == Binop->getLHS()->IgnoreParenImpCasts()) {
Hint = FixItHint::CreateReplacement(
Binop->getSourceRange(),
(llvm::Twine(TimeFactory) + "(" +
tooling::fixit::getText(*Call->getArg(0), *Result.Context) + " + " +
rewriteExprFromNumberToDuration(Result, *Scale, Binop->getRHS()) + ")")
.str());
} else {
assert(Call == Binop->getRHS()->IgnoreParenImpCasts() &&
"Call should be found on the RHS");
Hint = FixItHint::CreateReplacement(
Binop->getSourceRange(),
(llvm::Twine(TimeFactory) + "(" +
rewriteExprFromNumberToDuration(Result, *Scale, Binop->getLHS()) +
" + " + tooling::fixit::getText(*Call->getArg(0), *Result.Context) +
")")
.str());
}
diag(Binop->getBeginLoc(), "perform addition in the duration domain") << Hint;
}
} // namespace abseil
} // namespace tidy
} // namespace clang