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//===--- DefaultArgumentsCheck.cpp - clang-tidy----------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "DefaultArgumentsCheck.h"
using namespace clang::ast_matchers;
namespace clang {
namespace tidy {
namespace fuchsia {
void DefaultArgumentsCheck::registerMatchers(MatchFinder *Finder) {
// Calling a function which uses default arguments is disallowed.
Finder->addMatcher(cxxDefaultArgExpr().bind("stmt"), this);
// Declaring default parameters is disallowed.
Finder->addMatcher(parmVarDecl(hasDefaultArgument()).bind("decl"), this);
}
void DefaultArgumentsCheck::check(const MatchFinder::MatchResult &Result) {
if (const auto *S =
Result.Nodes.getNodeAs<CXXDefaultArgExpr>("stmt")) {
diag(S->getUsedLocation(),
"calling a function that uses a default argument is disallowed");
diag(S->getParam()->getLocStart(),
"default parameter was declared here",
DiagnosticIDs::Note);
} else if (const ParmVarDecl *D =
Result.Nodes.getNodeAs<ParmVarDecl>("decl")) {
SourceRange DefaultArgRange = D->getDefaultArgRange();
if (DefaultArgRange.getEnd() != D->getLocEnd()) {
return;
} else if (DefaultArgRange.getBegin().isMacroID()) {
diag(D->getLocStart(),
"declaring a parameter with a default argument is disallowed");
} else {
SourceLocation StartLocation = D->getName().empty() ?
D->getLocStart() : D->getLocation();
SourceRange RemovalRange(Lexer::getLocForEndOfToken(
StartLocation, 0,
*Result.SourceManager,
Result.Context->getLangOpts()
),
DefaultArgRange.getEnd()
);
diag(D->getLocStart(),
"declaring a parameter with a default argument is disallowed")
<< D
<< FixItHint::CreateRemoval(RemovalRange);
}
}
}
} // namespace fuchsia
} // namespace tidy
} // namespace clang
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