parser: make C struct fields public by default

[StunxFS]

This PR makes public all the fields that are declared in a C struct (struct declarations are not namespaced in C, and their fields are accessible from everywhere (if you do not use partial declarations and separate compilation)).

Fix #22695.

module main

import fontstash

fn main() {
	params := &C.FONSparams{
		width:        512
		height:       512
		flags:        0
		userPtr:      unsafe { nil }
		renderCreate: fn (uptr voidptr, width int, height int) int {
			return 1
		}
		renderResize: fn (uptr voidptr, width int, height int) int {
			return 1
		}
		renderUpdate: fn (uptr voidptr, rect &int, data &u8) {}
		renderDraw: fn (uptr voidptr, verts &f32, tcoords &f32, colors &u32, nverts int) {}
		renderDelete: fn (uptr voidptr) {}
	}

	context := fontstash.create_internal(params)
	eprintln(context)
}

$ v run main.v
fontstash.Context(C.FONScontext{})

_{Huly®: V_0.6-21154}

[spytheman]

Excellent work.

[StunxFS]

One thing to note is that when using v fmt, all C structs will automatically have a pub mut: section.

[spytheman]

One thing to note is that when using v fmt, all C structs will automatically have a pub mut: section.

Even better - the committed code then will tend to closely reflect the reality, that they are public and mutable.