Compile / edit time pluggable analyzers like C#

It would be nice to have similar plugabble compile time / editing time analyzer plugins as introduced in C# in Build 2015, see the video.

Analyzer is a library that can do additional syntax checks, tag lines as errors / warnings, and are interpreted by language service.

I can imagine one could do similar things with it as Facebook's flow does e.g. own nullable checking just by writing own analyzer. This would be configurable from tsconfig, maybe one could whitelist the files each analyzer works on. This way the nullability check analyzer would only complain about the code I want.

该 issue 一开始没有指出任何文件、测试或入口点。先定位编译器和语言服务的扩展点，然后在实现之前定义分析器 API、配置行为以及诊断集成。