52 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "DefaultArgumentsDeclarationsCheck.h"10#include "clang/Lex/Lexer.h"11 12using namespace clang::ast_matchers;13 14namespace clang::tidy::fuchsia {15 16void DefaultArgumentsDeclarationsCheck::registerMatchers(MatchFinder *Finder) {17 // Declaring default parameters is disallowed.18 Finder->addMatcher(parmVarDecl(hasDefaultArgument()).bind("decl"), this);19}20 21void DefaultArgumentsDeclarationsCheck::check(22 const MatchFinder::MatchResult &Result) {23 const auto *D = Result.Nodes.getNodeAs<ParmVarDecl>("decl");24 if (!D)25 return;26 27 const SourceRange DefaultArgRange = D->getDefaultArgRange();28 29 if (DefaultArgRange.getEnd() != D->getEndLoc())30 return;31 32 if (DefaultArgRange.getBegin().isMacroID()) {33 diag(D->getBeginLoc(),34 "declaring a parameter with a default argument is disallowed");35 return;36 }37 38 const SourceLocation StartLocation =39 D->getName().empty() ? D->getBeginLoc() : D->getLocation();40 41 const SourceRange RemovalRange(42 Lexer::getLocForEndOfToken(StartLocation, 0, *Result.SourceManager,43 Result.Context->getLangOpts()),44 DefaultArgRange.getEnd());45 46 diag(D->getBeginLoc(),47 "declaring a parameter with a default argument is disallowed")48 << D << FixItHint::CreateRemoval(RemovalRange);49}50 51} // namespace clang::tidy::fuchsia52