| 1 | //===--- DefaultArgumentsDeclarationsCheck.cpp - clang-tidy ---------------===// |
|---|---|
| 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-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #include "DefaultArgumentsDeclarationsCheck.h" |
| 10 | #include "clang/Lex/Lexer.h" |
| 11 | |
| 12 | using namespace clang::ast_matchers; |
| 13 | |
| 14 | namespace clang::tidy::fuchsia { |
| 15 | |
| 16 | void DefaultArgumentsDeclarationsCheck::registerMatchers(MatchFinder *Finder) { |
| 17 | // Declaring default parameters is disallowed. |
| 18 | Finder->addMatcher(NodeMatch: parmVarDecl(hasDefaultArgument()).bind(ID: "decl"), Action: this); |
| 19 | } |
| 20 | |
| 21 | void DefaultArgumentsDeclarationsCheck::check( |
| 22 | const MatchFinder::MatchResult &Result) { |
| 23 | const auto *D = Result.Nodes.getNodeAs<ParmVarDecl>(ID: "decl"); |
| 24 | if (!D) |
| 25 | return; |
| 26 | |
| 27 | 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 | SourceLocation StartLocation = |
| 39 | D->getName().empty() ? D->getBeginLoc() : D->getLocation(); |
| 40 | |
| 41 | SourceRange RemovalRange( |
| 42 | Lexer::getLocForEndOfToken(Loc: StartLocation, Offset: 0, SM: *Result.SourceManager, |
| 43 | LangOpts: 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(RemoveRange: RemovalRange); |
| 49 | } |
| 50 | |
| 51 | } // namespace clang::tidy::fuchsia |
| 52 |