vs2019 build bug fix

[brinkqiang]

[BowenFu]

@brinkqiang could you provide more info on the build issue and a repro sample?

[brinkqiang]

@brinkqiang could you provide more info on the build issue and a repro sample?

The issue lies with the matchit.h dependency. When compiling in the VS2019 environment(version: 16.11.36), it prompts the error:

matchit.h(459,44): fatal error C1202: Recursive type or function dependency
The context is too complex.

Based on suggestions from ChatGPT, I modified the code, and the compilation succeeded. I don't fully understand the specific reasons behind it; it just works this way.

[brinkqiang]

I see you have strong template programming skills. The C++ world lacks a good LINQ library. Are you interested in implementing one?

[BowenFu]

I see you have strong template programming skills. The C++ world lacks a good LINQ library. Are you interested in implementing one?

Regarding "LINQ" library, you may find rangev3 or https://github.com/BowenFu/hspp interesting.