开源组件库

1.格式化组件 - fmt

github：https://github.com/fmtlib/fmt

Motivation：

So why yet another formatting library?

There are plenty of methods for doing this task, from standard ones like the printf family of function and iostreams to Boost Format and FastFormat libraries. The reason for creating a new library is that every existing solution that I found either had serious issues or didn't provide all the features I needed.