Macro gstring 

macro_rules! gstring {
    ($s:literal) => { ... };
    ($s:literal, $validator:ty) => { ... };
    ($s:literal, $validator:ty, $min:expr) => { ... };
    ($s:literal, $validator:ty, $min:expr, $max:expr) => { ... };
    ($s:literal, $validator:ty, $min:expr, $max:expr, $ascii_only:expr) => { ... };
}

Compile-time check for GString without validation.

Validation can only happen at runtime, so this macro returned crate::InValidatedGString needed to be validated.

It’s only useful for checking bounds and ASCII statically at compile-time.

Examples

use g_string::gstring;

let ret = gstring!("aslkdm");
let ret = ret.validate().unwrap();
assert_eq!(ret, "aslkdm");

// let ret = gstring!("aslkdm", (), 2, 4); // won't even compile