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