Macro nom::sep

macro_rules! sep {
    ($i:expr,  $separator:ident, tuple ! ($($rest:tt)*) ) => { ... };
    ($i:expr,  $separator:ident, pair ! ($($rest:tt)*) ) => { ... };
    ($i:expr,  $separator:ident, delimited ! ($($rest:tt)*) ) => { ... };
    ($i:expr,  $separator:ident, separated_pair ! ($($rest:tt)*) ) => { ... };
    ($i:expr,  $separator:ident, preceded ! ($($rest:tt)*) ) => { ... };
    ($i:expr,  $separator:ident, terminated ! ($($rest:tt)*) ) => { ... };
    ($i:expr,  $separator:ident, do_parse ! ($($rest:tt)*) ) => { ... };
    ($i:expr,  $separator:ident, permutation ! ($($rest:tt)*) ) => { ... };
    ($i:expr,  $separator:ident, alt ! ($($rest:tt)*) ) => { ... };
    ($i:expr,  $separator:ident, alt_complete ! ($($rest:tt)*) ) => { ... };
    ($i:expr,  $separator:ident, switch ! ($($rest:tt)*) ) => { ... };
    ($i:expr,  $separator:ident, separated_list ! ($($rest:tt)*) ) => { ... };
    ($i:expr,  $separator:ident, many0 ! ($($rest:tt)*) ) => { ... };
    ($i:expr,  $separator:ident, many1 ! ($($rest:tt)*) ) => { ... };
    ($i:expr, $separator:ident, $submac:ident!( $($args:tt)* )) => { ... };
    ($i:expr, $separator:ident, $f:expr) => { ... };
}

sep is the parser rewriting macro for whitespace separated formats

it takes as argument a space eating function and a parser tree, and will intersperse the space parser everywhere

#[macro_export]
macro_rules! ws (
  ($i:expr, $($args:tt)*) => (
    {
      use $crate::sp;
      sep!($i, sp, $($args)*)
    }
  )
);