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// Copyright 2019 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_TORQUE_LS_GLOBALS_H_
#define V8_TORQUE_LS_GLOBALS_H_
#include <fstream>
#include "src/torque/contextual.h"
namespace v8 {
namespace internal {
namespace torque {
// When the language server is run by VS code, stdout can not be seen, as it is
// used as the communication channel. For debugging purposes a simple
// Log class is added, that allows writing diagnostics to a file configurable
// via command line flag.
class Logger : public ContextualClass<Logger> {
public:
Logger() : enabled_(false) {}
~Logger() {
if (enabled_) logfile_.close();
}
static void Enable(std::string path) {
Get().enabled_ = true;
Get().logfile_.open(path);
}
template <class... Args>
static void Log(Args&&... args) {
if (Enabled()) {
USE((Stream() << std::forward<Args>(args))...);
Flush();
}
}
private:
static bool Enabled() { return Get().enabled_; }
static std::ofstream& Stream() {
CHECK(Get().enabled_);
return Get().logfile_;
}
static void Flush() { Get().logfile_.flush(); }
private:
bool enabled_;
std::ofstream logfile_;
};
DECLARE_CONTEXTUAL_VARIABLE(TorqueFileList, std::vector<std::string>);
} // namespace torque
} // namespace internal
} // namespace v8
#endif // V8_TORQUE_LS_GLOBALS_H_
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