Macro nom::named

macro_rules! named {
    (# $($args : tt) *) => { ... };
    ($vis : vis $name : ident($i : ty) -> $o : ty, $submac : ident!
 ($($args : tt) *)) => { ... };
    ($vis : vis $name : ident < $i : ty, $o : ty, $e : ty >, $submac : ident!
 ($($args : tt) *)) => { ... };
    ($vis : vis $name : ident < $i : ty, $o : ty >, $submac : ident!
 ($($args : tt) *)) => { ... };
    ($vis : vis $name : ident < $o : ty >, $submac : ident! ($($args : tt) *)) => { ... };
    ($vis : vis $name : ident, $submac : ident! ($($args : tt) *)) => { ... };
}

Makes a function from a parser combination

The type can be set up if the compiler needs more information

Function-like declaration:

named!(my_function( &[u8] ) -> &[u8], tag!("abcd"));

Alternative declaration. First type parameter is input, second is output:

named!(my_function<&[u8], &[u8]>, tag!("abcd"));

This one will have &[u8] as input type, &[u8] as output type:

named!(my_function, tag!("abcd"));

Will use &[u8] as output type:

named!(my_function<&[u8]>, tag!("abcd"));

Prefix them with ‘pub’ to make the functions public:

named!(pub my_function, tag!("abcd"));

Prefix them with ‘pub(crate)’ to make the functions public within the crate:

named!(pub(crate) my_function, tag!("abcd"));