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//===--- ClangTidyCheck.cpp - clang-tidy ------------------------*- C++ -*-===//
//
// 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 "ClangTidyCheck.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/WithColor.h"
#include "llvm/Support/raw_ostream.h"
namespace clang {
namespace tidy {
char MissingOptionError::ID;
char UnparseableEnumOptionError::ID;
char UnparseableIntegerOptionError::ID;
std::string MissingOptionError::message() const {
llvm::SmallString<128> Buffer({"option not found '", OptionName, "'"});
return std::string(Buffer);
}
std::string UnparseableEnumOptionError::message() const {
llvm::SmallString<256> Buffer({"invalid configuration value '", LookupValue,
"' for option '", LookupName, "'"});
if (SuggestedValue)
Buffer.append({"; did you mean '", *SuggestedValue, "'?"});
return std::string(Buffer);
}
std::string UnparseableIntegerOptionError::message() const {
llvm::SmallString<256> Buffer({"invalid configuration value '", LookupValue,
"' for option '", LookupName, "'; expected ",
(IsBoolean ? "a bool" : "an integer value")});
return std::string(Buffer);
}
ClangTidyCheck::ClangTidyCheck(StringRef CheckName, ClangTidyContext *Context)
: CheckName(CheckName), Context(Context),
Options(CheckName, Context->getOptions().CheckOptions, Context) {
assert(Context != nullptr);
assert(!CheckName.empty());
}
DiagnosticBuilder ClangTidyCheck::diag(SourceLocation Loc, StringRef Message,
DiagnosticIDs::Level Level) {
return Context->diag(CheckName, Loc, Message, Level);
}
DiagnosticBuilder ClangTidyCheck::diag(StringRef Message,
DiagnosticIDs::Level Level) {
return Context->diag(CheckName, Message, Level);
}
DiagnosticBuilder
ClangTidyCheck::configurationDiag(StringRef Description,
DiagnosticIDs::Level Level) {
return Context->configurationDiag(Description, Level);
}
void ClangTidyCheck::run(const ast_matchers::MatchFinder::MatchResult &Result) {
// For historical reasons, checks don't implement the MatchFinder run()
// callback directly. We keep the run()/check() distinction to avoid interface
// churn, and to allow us to add cross-cutting logic in the future.
check(Result);
}
ClangTidyCheck::OptionsView::OptionsView(
StringRef CheckName, const ClangTidyOptions::OptionMap &CheckOptions,
ClangTidyContext *Context)
: NamePrefix(CheckName.str() + "."), CheckOptions(CheckOptions),
Context(Context) {}
llvm::Expected<std::string>
ClangTidyCheck::OptionsView::get(StringRef LocalName) const {
const auto &Iter = CheckOptions.find(NamePrefix + LocalName.str());
if (Iter != CheckOptions.end())
return Iter->getValue().Value;
return llvm::make_error<MissingOptionError>((NamePrefix + LocalName).str());
}
static ClangTidyOptions::OptionMap::const_iterator
findPriorityOption(const ClangTidyOptions::OptionMap &Options, StringRef NamePrefix,
StringRef LocalName) {
auto IterLocal = Options.find((NamePrefix + LocalName).str());
auto IterGlobal = Options.find(LocalName.str());
if (IterLocal == Options.end())
return IterGlobal;
if (IterGlobal == Options.end())
return IterLocal;
if (IterLocal->getValue().Priority >= IterGlobal->getValue().Priority)
return IterLocal;
return IterGlobal;
}
llvm::Expected<std::string>
ClangTidyCheck::OptionsView::getLocalOrGlobal(StringRef LocalName) const {
auto Iter = findPriorityOption(CheckOptions, NamePrefix, LocalName);
if (Iter != CheckOptions.end())
return Iter->getValue().Value;
return llvm::make_error<MissingOptionError>((NamePrefix + LocalName).str());
}
static llvm::Expected<bool> getAsBool(StringRef Value,
const llvm::Twine &LookupName) {
if (Value == "true")
return true;
if (Value == "false")
return false;
bool Result;
if (!Value.getAsInteger(10, Result))
return Result;
return llvm::make_error<UnparseableIntegerOptionError>(LookupName.str(),
Value.str(), true);
}
template <>
llvm::Expected<bool>
ClangTidyCheck::OptionsView::get<bool>(StringRef LocalName) const {
llvm::Expected<std::string> ValueOr = get(LocalName);
if (ValueOr)
return getAsBool(*ValueOr, NamePrefix + LocalName);
return ValueOr.takeError();
}
template <>
bool ClangTidyCheck::OptionsView::get<bool>(StringRef LocalName,
bool Default) const {
llvm::Expected<bool> ValueOr = get<bool>(LocalName);
if (ValueOr)
return *ValueOr;
reportOptionParsingError(ValueOr.takeError());
return Default;
}
template <>
llvm::Expected<bool>
ClangTidyCheck::OptionsView::getLocalOrGlobal<bool>(StringRef LocalName) const {
auto Iter = findPriorityOption(CheckOptions, NamePrefix, LocalName);
if (Iter != CheckOptions.end())
return getAsBool(Iter->getValue().Value, Iter->getKey());
return llvm::make_error<MissingOptionError>((NamePrefix + LocalName).str());
}
template <>
bool ClangTidyCheck::OptionsView::getLocalOrGlobal<bool>(StringRef LocalName,
bool Default) const {
llvm::Expected<bool> ValueOr = getLocalOrGlobal<bool>(LocalName);
if (ValueOr)
return *ValueOr;
reportOptionParsingError(ValueOr.takeError());
return Default;
}
void ClangTidyCheck::OptionsView::store(ClangTidyOptions::OptionMap &Options,
StringRef LocalName,
StringRef Value) const {
Options[NamePrefix + LocalName.str()] = Value;
}
void ClangTidyCheck::OptionsView::storeInt(ClangTidyOptions::OptionMap &Options,
StringRef LocalName,
int64_t Value) const {
store(Options, LocalName, llvm::itostr(Value));
}
template <>
void ClangTidyCheck::OptionsView::store<bool>(
ClangTidyOptions::OptionMap &Options, StringRef LocalName,
bool Value) const {
store(Options, LocalName, Value ? StringRef("true") : StringRef("false"));
}
llvm::Expected<int64_t> ClangTidyCheck::OptionsView::getEnumInt(
StringRef LocalName, ArrayRef<NameAndValue> Mapping, bool CheckGlobal,
bool IgnoreCase) const {
auto Iter = CheckGlobal
? findPriorityOption(CheckOptions, NamePrefix, LocalName)
: CheckOptions.find((NamePrefix + LocalName).str());
if (Iter == CheckOptions.end())
return llvm::make_error<MissingOptionError>((NamePrefix + LocalName).str());
StringRef Value = Iter->getValue().Value;
StringRef Closest;
unsigned EditDistance = -1;
for (const auto &NameAndEnum : Mapping) {
if (IgnoreCase) {
if (Value.equals_lower(NameAndEnum.second))
return NameAndEnum.first;
} else if (Value.equals(NameAndEnum.second)) {
return NameAndEnum.first;
} else if (Value.equals_lower(NameAndEnum.second)) {
Closest = NameAndEnum.second;
EditDistance = 0;
continue;
}
unsigned Distance = Value.edit_distance(NameAndEnum.second);
if (Distance < EditDistance) {
EditDistance = Distance;
Closest = NameAndEnum.second;
}
}
if (EditDistance < 3)
return llvm::make_error<UnparseableEnumOptionError>(
Iter->getKey().str(), Iter->getValue().Value, Closest.str());
return llvm::make_error<UnparseableEnumOptionError>(Iter->getKey().str(),
Iter->getValue().Value);
}
void ClangTidyCheck::OptionsView::reportOptionParsingError(
llvm::Error &&Err) const {
if (auto RemainingErrors =
llvm::handleErrors(std::move(Err), [](const MissingOptionError &) {}))
Context->configurationDiag(llvm::toString(std::move(RemainingErrors)));
}
template <>
Optional<std::string> ClangTidyCheck::OptionsView::getOptional<std::string>(
StringRef LocalName) const {
if (auto ValueOr = get(LocalName))
return *ValueOr;
else
consumeError(ValueOr.takeError());
return llvm::None;
}
template <>
Optional<std::string>
ClangTidyCheck::OptionsView::getOptionalLocalOrGlobal<std::string>(
StringRef LocalName) const {
if (auto ValueOr = getLocalOrGlobal(LocalName))
return *ValueOr;
else
consumeError(ValueOr.takeError());
return llvm::None;
}
} // namespace tidy
} // namespace clang
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