Macro nom::separated_nonempty_list

macro_rules! separated_nonempty_list {
    ($i : expr, $submac : ident! ($($args : tt) *), $submac2 : ident!
 ($($args2 : tt) *)) => { ... };
    ($i : expr, $submac : ident! ($($args : tt) *), $g : expr) => { ... };
    ($i : expr, $f : expr, $submac : ident! ($($args : tt) *)) => { ... };
    ($i : expr, $f : expr, $g : expr) => { ... };
}

separated_nonempty_list!(I -> IResult<I,T>, I -> IResult<I,O>) => I -> IResult<I, Vec<O>> separated_nonempty_list(sep, X) returns a Vec

it will return an error if there is no element in the list

use nom::multi::separated_nonempty_list;
use nom::bytes::complete::tag;

named!(parser<&str, Vec<&str>>, separated_nonempty_list!(tag("|"), tag("abc")));

assert_eq!(parser("abc|abc|abc"), Ok(("", vec!["abc", "abc", "abc"])));
assert_eq!(parser("abc123abc"), Ok(("123abc", vec!["abc"])));
assert_eq!(parser("abc|def"), Ok(("|def", vec!["abc"])));
assert_eq!(parser(""), Err(Err::Error(("", ErrorKind::Tag))));
assert_eq!(parser("def|abc"), Err(Err::Error(("def|abc", ErrorKind::Tag))));