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/*
* Copyright 2019 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 <initializer_list>
#include <iostream>
#include <sstream>
#include <vector>
#include "parse_location.h"
class Loggable {
public:
virtual ~Loggable() = default;
virtual std::string GetDebugName() const = 0;
virtual ParseLocation GetLocation() const = 0;
};
class LogMessage {
public:
LogMessage(ParseLocation loc, std::initializer_list<const Loggable*> tokens)
: debug_(false), loc_(loc), tokens_(tokens) {
Init();
}
LogMessage(bool debug, std::initializer_list<const Loggable*> tokens) : debug_(debug), tokens_(tokens) {
Init();
}
void Init() {
if (loc_.GetLine() != -1) {
stream_ << "\033[1mLine " << loc_.GetLine() << ": ";
}
if (!debug_) {
stream_ << "\033[1;31m";
stream_ << "ERROR: ";
stream_ << "\033[0m";
} else {
stream_ << "\033[1;m";
stream_ << "DEBUG: ";
stream_ << "\033[0m";
}
}
~LogMessage() {
if (debug_ && suppress_debug_) return;
std::cerr << stream_.str() << "\n";
for (const auto& token : tokens_) {
// Bold line number
std::cerr << "\033[1m";
std::cerr << " Line " << token->GetLocation().GetLine() << ": ";
std::cerr << "\033[0m";
std::cerr << token->GetDebugName() << "\n";
}
if (!debug_) {
abort();
}
}
std::ostream& stream() {
return stream_;
}
private:
std::ostringstream stream_;
bool debug_;
bool suppress_debug_{true};
ParseLocation loc_;
std::vector<const Loggable*> tokens_;
};
// Error Log stream. Aborts the program after the message is printed.
// The arguments to the macro is a list of Loggable objects that are printed when the error is printed.
#define ERROR(...) LogMessage(false, {__VA_ARGS__}).stream()
// ParseLocation error log, the first argument is a location.
#define ERRORLOC(_1, ...) LogMessage(_1, {__VA_ARGS__}).stream()
#define DEBUG(...) LogMessage(true, {__VA_ARGS__}).stream()
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