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//===--- DurationDivisionCheck.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 "DurationDivisionCheck.h"
#include "clang/AST/ASTContext.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/Lex/Lexer.h"
namespace clang {
namespace tidy {
namespace abseil {
using namespace clang::ast_matchers;
void DurationDivisionCheck::registerMatchers(MatchFinder *Finder) {
const auto DurationExpr =
expr(hasType(cxxRecordDecl(hasName("::absl::Duration"))));
Finder->addMatcher(
traverse(TK_AsIs,
implicitCastExpr(
hasSourceExpression(ignoringParenCasts(
cxxOperatorCallExpr(hasOverloadedOperatorName("/"),
hasArgument(0, DurationExpr),
hasArgument(1, DurationExpr))
.bind("OpCall"))),
hasImplicitDestinationType(qualType(unless(isInteger()))),
unless(hasParent(cxxStaticCastExpr())),
unless(hasParent(cStyleCastExpr())),
unless(isInTemplateInstantiation()))),
this);
}
void DurationDivisionCheck::check(const MatchFinder::MatchResult &Result) {
const auto *OpCall = Result.Nodes.getNodeAs<CXXOperatorCallExpr>("OpCall");
diag(OpCall->getOperatorLoc(),
"operator/ on absl::Duration objects performs integer division; "
"did you mean to use FDivDuration()?")
<< FixItHint::CreateInsertion(OpCall->getBeginLoc(),
"absl::FDivDuration(")
<< FixItHint::CreateReplacement(
SourceRange(OpCall->getOperatorLoc(), OpCall->getOperatorLoc()),
", ")
<< FixItHint::CreateInsertion(
Lexer::getLocForEndOfToken(
Result.SourceManager->getSpellingLoc(OpCall->getEndLoc()), 0,
*Result.SourceManager, Result.Context->getLangOpts()),
")");
}
} // namespace abseil
} // namespace tidy
} // namespace clang
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