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//===--- DefaultArgumentsDeclarationsCheck.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 "DefaultArgumentsDeclarationsCheck.h"
#include "clang/Lex/Lexer.h"
using namespace clang::ast_matchers;
namespace clang {
namespace tidy {
namespace fuchsia {
void DefaultArgumentsDeclarationsCheck::registerMatchers(MatchFinder *Finder) {
// Declaring default parameters is disallowed.
Finder->addMatcher(parmVarDecl(hasDefaultArgument()).bind("decl"), this);
}
void DefaultArgumentsDeclarationsCheck::check(
const MatchFinder::MatchResult &Result) {
const auto *D = Result.Nodes.getNodeAs<ParmVarDecl>("decl");
if (!D)
return;
SourceRange DefaultArgRange = D->getDefaultArgRange();
if (DefaultArgRange.getEnd() != D->getEndLoc())
return;
if (DefaultArgRange.getBegin().isMacroID()) {
diag(D->getBeginLoc(),
"declaring a parameter with a default argument is disallowed");
return;
}
SourceLocation StartLocation =
D->getName().empty() ? D->getBeginLoc() : D->getLocation();
SourceRange RemovalRange(
Lexer::getLocForEndOfToken(StartLocation, 0, *Result.SourceManager,
Result.Context->getLangOpts()),
DefaultArgRange.getEnd());
diag(D->getBeginLoc(),
"declaring a parameter with a default argument is disallowed")
<< D << FixItHint::CreateRemoval(RemovalRange);
}
} // namespace fuchsia
} // namespace tidy
} // namespace clang
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