62 lines
2.1 KiB
C++
62 lines
2.1 KiB
C++
//===--- DefaultArgumentsCheck.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 "DefaultArgumentsCheck.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 fuchsia {
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void DefaultArgumentsCheck::registerMatchers(MatchFinder *Finder) {
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// Calling a function which uses default arguments is disallowed.
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Finder->addMatcher(cxxDefaultArgExpr().bind("stmt"), this);
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// Declaring default parameters is disallowed.
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Finder->addMatcher(parmVarDecl(hasDefaultArgument()).bind("decl"), this);
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}
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void DefaultArgumentsCheck::check(const MatchFinder::MatchResult &Result) {
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if (const auto *S =
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Result.Nodes.getNodeAs<CXXDefaultArgExpr>("stmt")) {
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diag(S->getUsedLocation(),
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"calling a function that uses a default argument is disallowed");
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diag(S->getParam()->getBeginLoc(), "default parameter was declared here",
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DiagnosticIDs::Note);
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} else if (const ParmVarDecl *D =
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Result.Nodes.getNodeAs<ParmVarDecl>("decl")) {
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SourceRange DefaultArgRange = D->getDefaultArgRange();
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if (DefaultArgRange.getEnd() != D->getEndLoc()) {
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return;
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} else if (DefaultArgRange.getBegin().isMacroID()) {
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diag(D->getBeginLoc(),
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"declaring a parameter with a default argument is disallowed");
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} else {
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SourceLocation StartLocation =
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D->getName().empty() ? D->getBeginLoc() : D->getLocation();
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SourceRange RemovalRange(Lexer::getLocForEndOfToken(
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StartLocation, 0,
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*Result.SourceManager,
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Result.Context->getLangOpts()
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),
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DefaultArgRange.getEnd()
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);
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diag(D->getBeginLoc(),
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"declaring a parameter with a default argument is disallowed")
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<< D << FixItHint::CreateRemoval(RemovalRange);
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}
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}
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}
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} // namespace fuchsia
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} // namespace tidy
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} // namespace clang
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