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//===--- UseNoexceptCheck.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 "UseNoexceptCheck.h"
#include "clang/AST/ASTContext.h"
#include "clang/Lex/Lexer.h"
using namespace clang::ast_matchers;
namespace clang {
namespace tidy {
namespace modernize {
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) {
if (!getLangOpts().CPlusPlus11)
return;
Finder->addMatcher(
functionDecl(
cxxMethodDecl(
hasTypeLoc(loc(functionProtoType(hasDynamicExceptionSpec()))),
anyOf(hasOverloadedOperatorName("delete[]"),
hasOverloadedOperatorName("delete"), cxxDestructorDecl()))
.bind("del-dtor"))
.bind("funcDecl"),
this);
Finder->addMatcher(
functionDecl(
hasTypeLoc(loc(functionProtoType(hasDynamicExceptionSpec()))),
unless(anyOf(hasOverloadedOperatorName("delete[]"),
hasOverloadedOperatorName("delete"),
cxxDestructorDecl())))
.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();
}
CharSourceRange CRange = Lexer::makeFileCharRange(
CharSourceRange::getTokenRange(Range), *Result.SourceManager,
Result.Context->getLangOpts());
assert(FnTy && "FunctionProtoType is null.");
bool IsNoThrow = FnTy->isNothrow(*Result.Context);
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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