Macro abi 

macro_rules! abi {
    ( $abi:literal ) => { ... };
}

Converts an ABI string like “C” into the corresponding value for use in const generics. This is most useful for stable rust since there u8s are used.

Example

type F = extern "C" fn(i32) -> i32;
type R = make_non_extern!(F);
// `R` is `fn(i32) -> i32`

Equivalent to:

with_abi!(Abi::Rust, F)