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 NotValidatedGString 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