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/*
* Copyright (C) 2015, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <iostream>
#include <memory>
#include <string>
#include "location.h"
class AidlNode;
// Generic point for printing any error in the AIDL compiler.
class AidlErrorLog {
public:
enum Severity { NO_OP, WARNING, ERROR, FATAL };
AidlErrorLog(Severity severity, const AidlLocation& location, const std::string& suffix = "");
AidlErrorLog(Severity severity, const std::string& filename);
AidlErrorLog(Severity severity, const AidlNode& node);
AidlErrorLog(Severity severity, const AidlNode* node) : AidlErrorLog(severity, *node) {}
template <typename T>
AidlErrorLog(Severity severity, const std::unique_ptr<T>& node) : AidlErrorLog(severity, *node) {}
~AidlErrorLog();
// AidlErrorLog is a single use object. No need to copy
AidlErrorLog(const AidlErrorLog&) = delete;
AidlErrorLog& operator=(const AidlErrorLog&) = delete;
// btw, making it movable so that functions can return it.
AidlErrorLog(AidlErrorLog&&) = default;
AidlErrorLog& operator=(AidlErrorLog&&) = delete;
template <typename T>
AidlErrorLog& operator<<(T&& arg) {
if (severity_ != NO_OP) {
(*os_) << std::forward<T>(arg);
}
return *this;
}
static void clearError() { sHadError = false; }
static bool hadError() { return sHadError; }
private:
std::ostream* os_;
Severity severity_;
const AidlLocation location_;
const std::string suffix_;
static bool sHadError;
};
// A class used to make it obvious to clang that code is going to abort. This
// informs static analyses of the aborting behavior of `AIDL_FATAL`, and
// helps generate slightly faster/smaller code.
class AidlAbortOnDestruction {
public:
__attribute__((noreturn)) ~AidlAbortOnDestruction() { abort(); }
};
#define AIDL_ERROR(CONTEXT) ::AidlErrorLog(AidlErrorLog::ERROR, (CONTEXT))
#define AIDL_FATAL(CONTEXT) \
(::AidlAbortOnDestruction(), ::AidlErrorLog(AidlErrorLog::FATAL, (CONTEXT)))
#define AIDL_FATAL_IF(CONDITION, CONTEXT) \
if (CONDITION) AIDL_FATAL(CONTEXT) << "Bad internal state: " << #CONDITION << ": "
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