forked from OSchip/llvm-project
73 lines
2.6 KiB
C++
73 lines
2.6 KiB
C++
//===--- DurationFactoryFloatCheck.cpp - clang-tidy -----------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "DurationFactoryFloatCheck.h"
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#include "DurationRewriter.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/ASTMatchers/ASTMatchFinder.h"
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#include "clang/Lex/Lexer.h"
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#include "clang/Tooling/FixIt.h"
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using namespace clang::ast_matchers;
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namespace clang {
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namespace tidy {
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namespace abseil {
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// Returns `true` if `Range` is inside a macro definition.
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static bool InsideMacroDefinition(const MatchFinder::MatchResult &Result,
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SourceRange Range) {
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return !clang::Lexer::makeFileCharRange(
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clang::CharSourceRange::getCharRange(Range),
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*Result.SourceManager, Result.Context->getLangOpts())
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.isValid();
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}
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void DurationFactoryFloatCheck::registerMatchers(MatchFinder *Finder) {
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Finder->addMatcher(
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callExpr(callee(functionDecl(DurationFactoryFunction())),
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hasArgument(0, anyOf(cxxStaticCastExpr(hasDestinationType(
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realFloatingPointType())),
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cStyleCastExpr(hasDestinationType(
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realFloatingPointType())),
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cxxFunctionalCastExpr(hasDestinationType(
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realFloatingPointType())),
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floatLiteral())))
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.bind("call"),
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this);
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}
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void DurationFactoryFloatCheck::check(const MatchFinder::MatchResult &Result) {
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const auto *MatchedCall = Result.Nodes.getNodeAs<CallExpr>("call");
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// Don't try and replace things inside of macro definitions.
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if (InsideMacroDefinition(Result, MatchedCall->getSourceRange()))
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return;
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const Expr *Arg = MatchedCall->getArg(0)->IgnoreImpCasts();
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// Arguments which are macros are ignored.
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if (Arg->getBeginLoc().isMacroID())
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return;
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llvm::Optional<std::string> SimpleArg = stripFloatCast(Result, *Arg);
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if (!SimpleArg)
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SimpleArg = stripFloatLiteralFraction(Result, *Arg);
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if (SimpleArg) {
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diag(MatchedCall->getBeginLoc(),
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(llvm::Twine("use the integer version of absl::") +
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MatchedCall->getDirectCallee()->getName())
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.str())
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<< FixItHint::CreateReplacement(Arg->getSourceRange(), *SimpleArg);
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}
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}
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} // namespace abseil
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} // namespace tidy
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} // namespace clang
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