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//===--- UseNoexceptCheck.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 "UseNoexceptCheck.h"
#include "clang/AST/ASTContext.h"
#include "clang/Lex/Lexer.h"
using namespace clang::ast_matchers;
namespace clang {
namespace tidy {
namespace modernize {
namespace {
AST_MATCHER(NamedDecl, isValid) { return !Node.isInvalidDecl(); }
} // namespace
UseNoexceptCheck::UseNoexceptCheck(StringRef Name, ClangTidyContext *Context)
: ClangTidyCheck(Name, Context),
NoexceptMacro(Options.get("ReplacementString", "")),
UseNoexceptFalse(Options.get("UseNoexceptFalse", true)) {}
void UseNoexceptCheck::storeOptions(ClangTidyOptions::OptionMap &Opts) {
Options.store(Opts, "ReplacementString", NoexceptMacro);
Options.store(Opts, "UseNoexceptFalse", UseNoexceptFalse);
}
void UseNoexceptCheck::registerMatchers(MatchFinder *Finder) {
Finder->addMatcher(
functionDecl(
isValid(),
hasTypeLoc(loc(functionProtoType(hasDynamicExceptionSpec()))),
optionally(cxxMethodDecl(anyOf(hasAnyOverloadedOperatorName(
"delete[]", "delete"),
cxxDestructorDecl()))
.bind("del-dtor")))
.bind("funcDecl"),
this);
Finder->addMatcher(
parmVarDecl(anyOf(hasType(pointerType(pointee(parenType(innerType(
functionProtoType(hasDynamicExceptionSpec())))))),
hasType(memberPointerType(pointee(parenType(innerType(
functionProtoType(hasDynamicExceptionSpec()))))))))
.bind("parmVarDecl"),
this);
}
void UseNoexceptCheck::check(const MatchFinder::MatchResult &Result) {
const FunctionProtoType *FnTy = nullptr;
bool DtorOrOperatorDel = false;
SourceRange Range;
if (const auto *FuncDecl = Result.Nodes.getNodeAs<FunctionDecl>("funcDecl")) {
DtorOrOperatorDel = Result.Nodes.getNodeAs<FunctionDecl>("del-dtor");
FnTy = FuncDecl->getType()->getAs<FunctionProtoType>();
if (const auto *TSI = FuncDecl->getTypeSourceInfo())
Range =
TSI->getTypeLoc().castAs<FunctionTypeLoc>().getExceptionSpecRange();
} else if (const auto *ParmDecl =
Result.Nodes.getNodeAs<ParmVarDecl>("parmVarDecl")) {
FnTy = ParmDecl->getType()
->getAs<Type>()
->getPointeeType()
->getAs<FunctionProtoType>();
if (const auto *TSI = ParmDecl->getTypeSourceInfo())
Range = TSI->getTypeLoc()
.getNextTypeLoc()
.IgnoreParens()
.castAs<FunctionProtoTypeLoc>()
.getExceptionSpecRange();
}
assert(FnTy && "FunctionProtoType is null.");
if (isUnresolvedExceptionSpec(FnTy->getExceptionSpecType()))
return;
assert(Range.isValid() && "Exception Source Range is invalid.");
CharSourceRange CRange = Lexer::makeFileCharRange(
CharSourceRange::getTokenRange(Range), *Result.SourceManager,
Result.Context->getLangOpts());
bool IsNoThrow = FnTy->isNothrow();
StringRef ReplacementStr =
IsNoThrow
? NoexceptMacro.empty() ? "noexcept" : NoexceptMacro.c_str()
: NoexceptMacro.empty()
? (DtorOrOperatorDel || UseNoexceptFalse) ? "noexcept(false)"
: ""
: "";
FixItHint FixIt;
if ((IsNoThrow || NoexceptMacro.empty()) && CRange.isValid())
FixIt = FixItHint::CreateReplacement(CRange, ReplacementStr);
diag(Range.getBegin(), "dynamic exception specification '%0' is deprecated; "
"consider %select{using '%2'|removing it}1 instead")
<< Lexer::getSourceText(CRange, *Result.SourceManager,
Result.Context->getLangOpts())
<< ReplacementStr.empty() << ReplacementStr << FixIt;
}
} // namespace modernize
} // namespace tidy
} // namespace clang
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