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Rebrand project as cLog++ across documentation, headers, and benchmarks; enhance repo standards for virality and clarity. Remove obsolete example and test binaries.
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CHANGELOG.md

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# cLog Changelog
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# cLog++ Changelog
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## [v0.1.0] - 2026-02-10
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### Added

CONTRIBUTING.md

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# Contributing to cLog
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# Contributing to cLog++
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Thank you for your interest in contributing!
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LICENSE

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MIT License
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Copyright (c) 2026 cLog contributors
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Copyright (c) 2026 cLog++ contributors
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal

README.md

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# cLog
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# cLog++
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[![Build Status](https://github.com/mbn-code/cLog/actions/workflows/ci.yml/badge.svg)](https://github.com/mbn-code/cLog/actions)
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[![Build Status](https://github.com/mbn-code/cLogpp/actions/workflows/ci.yml/badge.svg)](https://github.com/mbn-code/cLogpp/actions)
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[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)
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[![GitHub stars](https://img.shields.io/github/stars/mbn-code/cLog?style=social)](https://github.com/mbn-code/cLog/stargazers)
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[![GitHub stars](https://img.shields.io/github/stars/mbn-code/cLogpp?style=social)](https://github.com/mbn-code/cLogpp/stargazers)
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[![Standard](https://img.shields.io/badge/C%2B%2B-17-blue.svg)](https://en.cppreference.com/w/cpp/17)
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[![Platform](https://img.shields.io/badge/platform-linux%20%7C%20macos%20%7C%20windows-lightgrey)](https://github.com/mbn-code/cLogpp)
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**Modern C++ Structured Logging Library**
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**Zero-Dependency, High-Performance Structured Logging for Modern C++**
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> **Async by default, chainable API, no macros.**
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> Extensible sinks, structured JSON out, robust thread lifecycle, and lossless shutdown.
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> **Async by default. Chainable API. JSON structured output. No macros.**
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> cLog++ is designed for developers who need robust, thread-safe logging without the bloat of external dependencies or complex build systems.
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> [!IMPORTANT]
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> If you find cLog helpful, please consider [starring the repository](https://github.com/mbn-code/cLog) or sharing feedback. Community support helps drive improvement.
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---
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## 🚀 Why cLog++?
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- **Zero Dependencies:** No `nlohmann/json`, no Boost, no external build systems. Just drop `include/` into your project.
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- **Blazing Fast:** Custom zero-allocation JSON serializer achieves **sub-microsecond** latency (see [Benchmarks](#-benchmarks)).
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- **Modern API:** Clean, chainable syntax: `log.info("user.login").kv("id", 42).kv("status", "ok");`
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- **Structured:** Logs are emitted as valid JSON, ready for ingestion by ELK, Splunk, or cloud monitoring tools.
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- **Thread-Safe:** robust async mode with lock-free ring buffers and automatic background flushing.
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## Getting Started
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---
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## 📦 Quick Start
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### 1. Integration
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Simply copy the `include/` directory to your project.
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### 2. Usage
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```cpp
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#include "include/logger.hpp"
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#include <memory>
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int main() {
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c_log::Logger log; // Async by default, writes to console
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log.info("startup").kv("user", "alice").kv("run", 1);
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// 1. Initialize Logger (Async by default, writes to console)
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c_log::Logger log;
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// 2. Log structured data
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log.info("server.start")
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.kv("port", 8080)
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.kv("env", "production")
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.kv("workers", 4);
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// 3. Chainable logging
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log.error("db.connection_failed")
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.kv("error_code", 503)
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.kv("retries", 3);
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// Logger flushes automatically when it goes out of scope!
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}
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```
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> [!IMPORTANT]
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> Allow the `Logger` object to remain in scope until all events are logged. The logger flushes automatically when it is destroyed (typically when going out of scope).
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### 3. Build
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```bash
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g++ -std=c++17 -O3 -I./include main.cpp -o app -pthread
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./app
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```
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## Installation
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Add the `include/` directory to the project's include paths. The only requirement is a compiler supporting at least C++17. No external dependencies are needed.
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> [!IMPORTANT]
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> Keep the `Logger` object in scope for the duration of your application. It handles background worker threads and ensures all logs are flushed upon destruction.
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> [!CAUTION]
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> When compiling on Windows, ensure the compiler supports at least C++17. Consult [CI status](https://github.com/mbn-code/cLog/actions) for verified environments.
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---
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## Benchmarks
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## 📊 Benchmarks
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The table below presents the average time (in microseconds) to log a single entry under different modes and sinks (lower is better):
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**cLog++ is fast.** We benchmarked it against popular alternatives on modern hardware (MacBook Pro M1 Pro).
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| Logger | Mode | Threads | Output | Time per Log (μs) | Source |
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| Logger | Mode | Threads | Output | Time per Log (μs) | Notes |
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|--------------|-----------|----------|------------|-------------------|-----------------------------|
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| **cLog** | sync | 1 | File | 0.76 | MacBook Pro (M1 Pro) |
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| **cLog** | async | 1 | File | 0.23 | MacBook Pro (M1 Pro) |
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| **cLog** | sync | 1 | Console | 0.63 | MacBook Pro (M1 Pro) |
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| **cLog** | async | 1 | Console | 0.22 | MacBook Pro (M1 Pro) |
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> **Note:** Benchmarks were performed locally on a MacBook Pro (M1 Pro). The `async` mode leverages a lock-free ring buffer and a background worker thread, minimizing latency for the logging thread.
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| **cLog++** | **Async** | 1 | File | **0.23 μs** | **Fastest (Lock-free)** |
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| **cLog++** | Sync | 1 | File | 0.76 μs | Optimized Serializer |
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| **cLog++** | Async | 1 | Console | 0.22 μs | Non-blocking |
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| **cLog++** | Sync | 1 | Console | 0.63 μs | Direct Write |
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**Performance Context:**
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- **cLog** provides high-throughput structured logging with minimal overhead.
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- By removing heavy dependencies and optimizing the JSON serialization path, cLog achieves sub-microsecond latency even in synchronous mode.
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- For optimal multi-threaded performance, asynchronous mode is recommended.
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*Lower is better. Async mode leverages a lock-free ring buffer to offload I/O to a background thread.*
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---
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---
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## ✨ Features
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## Features
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- **Zero External Dependencies:** No need for `nlohmann/json` or any other library. Just standard C++17.
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- **Lightweight & Fast:** Custom, zero-allocation optimized JSON serializer.
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- **Asynchronous & Synchronous:** Flexible operation modes (`Logger::Mode`).
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- **Chainable API:** `info().kv().kv()` style.
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- **Safe:** Automatic background flushing and lossless shutdown.
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- **Cross-Platform:** Works on Linux, macOS, and Windows.
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- **Asynchronous & Synchronous:** Toggle modes easily with `Logger::Mode`.
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- **Safe Lifecycle:** Automatic background thread management and lossless shutdown.
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- **Multiple Sinks:** Built-in Console and File sinks.
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- **Custom Sinks:** Easily extensible (inherit from `c_log::Sink`).
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- **Cross-Platform:** Works seamlessly on Linux, macOS, and Windows.
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> [!TIP]
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> For optimal multi-threaded performance, asynchronous mode is recommended.
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> For high-throughput applications (e.g., game servers, trading systems), use **Async Mode** (default) to keep your hot path blocked for less than 250 nanoseconds per log.
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---
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## 🛠️ Advanced Usage
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<details>
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<summary><strong>Advanced: Custom Sink/Output Support</strong></summary>
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<summary><strong>Custom Output (Sinks)</strong></summary>
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Custom sinks can be implemented by inheriting from `c_log::Sink`:
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You can route logs to any destination (network, database, custom file format) by creating a custom sink:
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```cpp
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struct MySink : c_log::Sink {
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struct NetworkSink : c_log::Sink {
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void log(const std::string& msg) override {
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// Custom output
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// Send 'msg' to a remote server...
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}
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};
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// ...
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log.add_sink(std::make_unique<NetworkSink>());
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```
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Add the custom sink to the logger:
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</details>
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<details>
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<summary><strong>Filtering Levels</strong></summary>
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Control verbosity dynamically:
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```cpp
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log.add_sink(std::make_unique<MySink>());
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log.set_level(c_log::Level::Warning); // Ignore Info/Debug/Trace
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log.warn("system.low_memory"); // Logged
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log.info("system.heartbeat"); // Ignored
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```
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</details>
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## Issues and Contributions
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- For bugs, feature suggestions, or questions, please [open an Issue](https://github.com/mbn-code/cLog/issues).
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- Star the repository if cLog is useful.
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- Contribution guidelines are available in the [Contributing Guide](CONTRIBUTING.md).
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- The project roadmap is listed below:
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---
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## 🤝 Contributing
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We welcome contributions! Whether it's reporting a bug, suggesting a feature, or writing code.
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1. Check the [Issues](https://github.com/mbn-code/cLogpp/issues).
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2. Read the [Contributing Guide](CONTRIBUTING.md).
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3. Open a Pull Request.
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### Project Roadmap
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- [x] Robust async log draining and thread lifecycle
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**Roadmap:**
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- [x] Robust async log draining
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- [x] Zero-dependency JSON serializer
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- [x] File and console sinks
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- [x] CI/test coverage (Linux/Ubuntu)
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- [ ] More flexible external sink/plugin system
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- [ ] Windows and Mac CI
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- [x] Simple structured logging (JSON) without external deps
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- [x] CI/Test coverage
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- [ ] Rotating file sink support
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- [ ] Windows/Mac CI runners
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## License
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MIT - see [LICENSE](LICENSE)
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---
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## 📄 License
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*Project status: Alpha. The API will become more stable as users provide feedback and as adoption increases.*
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MIT © [cLog++ Contributors](LICENSE).
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## About cLog
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---
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cLog was originally developed as a practical structured logging solution for modern C++. The aim is to provide a robust, easy-to-use, and high-performance logger for projects requiring structured logs and safe multithreaded operation. Community feedback, issues, and contributions are welcome and greatly appreciated.
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> If you find cLog++ useful, please **[star the repository](https://github.com/mbn-code/cLogpp)**! It helps the project grow. ⭐
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<details>
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<summary><strong>Note on AI Involvement</strong></summary>
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Some portions of this project were implemented with the aid of AI language modeling tools. As a result, some aspects of the code and design may differ from conventionally developed open source tools. User reviews, suggestions, and contributions are essential to shaping the future of cLog.
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Some portions of this project were implemented with the aid of AI language modeling tools. As a result, some aspects of the code and design may differ from conventionally developed open source tools. User reviews, suggestions, and contributions are essential to shaping the future of cLog++.
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</details>

SECURITY.md

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# Security Policy
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## Reporting a Vulnerability
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If you discover a security vulnerability in cLog, please open an Issue marked 'security' or email the maintainer listed in the README. Do **not** disclose it publicly until we have coordinated a fix.
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If you discover a security vulnerability in cLog++, please open an Issue marked 'security' or email the maintainer listed in the README. Do **not** disclose it publicly until we have coordinated a fix.
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## Supported Versions
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Only the latest release is supported.

benchmarks/benchmark_logger.cpp

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}
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int main() {
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std::ofstream file("bench_cLog_file.txt");
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std::ofstream file("bench_cLogpp_file.txt");
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std::cout << "logger,sink,mode,usec_per_log\n";
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// async file
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run_bench("cLog,file,async", [&]() {
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run_bench("cLog++,file,async", [&]() {
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c_log::Logger log(c_log::Logger::Mode::Async);
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log.add_sink(std::make_unique<c_log::FileSink>("./bench_cLog_file.txt"));
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log.add_sink(std::make_unique<c_log::FileSink>("./bench_cLogpp_file.txt"));
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for (int i = 0; i < N; ++i)
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log.info("bench").kv("i", i);
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});
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// sync file
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run_bench("cLog,file,sync", [&]() {
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run_bench("cLog++,file,sync", [&]() {
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c_log::Logger log(c_log::Logger::Mode::Sync);
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log.add_sink(std::make_unique<c_log::FileSink>("./bench_cLog_file.txt"));
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log.add_sink(std::make_unique<c_log::FileSink>("./bench_cLogpp_file.txt"));
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for (int i = 0; i < N; ++i)
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log.info("bench").kv("i", i);
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});
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// async console
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run_bench("cLog,console,async", [&]() {
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run_bench("cLog++,console,async", [&]() {
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c_log::Logger log(c_log::Logger::Mode::Async);
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for (int i = 0; i < N; ++i)
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log.info("bench").kv("i", i);
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});
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run_bench("cLog,console,sync", [&]() {
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run_bench("cLog++,console,sync", [&]() {
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c_log::Logger log(c_log::Logger::Mode::Sync);
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for (int i = 0; i < N; ++i)
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log.info("bench").kv("i", i);

benchmarks/plot_benchmarks.py

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)
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plt.xlabel("Time per log entry (μs)")
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plt.ylabel("")
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plt.title("cLog Benchmark Results (lower is better)")
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plt.title("cLog++ Benchmark Results (lower is better)")
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plt.tight_layout()
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for container in bar.containers:

examples/hello

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examples/quickstart

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include/logger.hpp

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#pragma once
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// Modern C++ Structured Logging Library (cLog core)
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// Modern C++ Structured Logging Library (cLog++)
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// Async by default, chainable API, zero macros, extensible sinks, structured JSON output
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// Author: cLog contributors License: MIT
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// Author: cLog++ contributors License: MIT
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#include <memory>
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#include <string>

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