Formalizing @cdecl

[YOCKOW]

I guess here is latest thread about this:

From `@_cdecl` to `@cdecl`

Hi everyone, I'd like to discuss Swift’s @_cdecl attribute by removing the underscore—renaming it to @cdecl—to clearly signal that it is a stable, first-class feature for exposing Swift functions to C. I believe this change could significantly enhance Swift’s role as a cross-platform systems language. Here’s the context and key points for discussion: Learning from Rust’s Success: Rust has made great strides in making itself easily exposable to other languages by using mechanisms like extern …