Macro gutenberg_post_parser::take_until_terminated

macro_rules! take_until_terminated {
    (_ $input:expr, $substr:expr, $consume:expr, $submac:ident!( $($args:tt)* )) => { ... };
    ($input:expr, $substr:expr, $submac:ident!( $($args:tt)* )) => { ... };
    ($input:expr, $substr:expr, $f:expr) => { ... };
}

take_until_terminated(S, C) is like take_until but with a lookahead combinator C. It's not similar to terminated!(take_until(S, peek!(C))) because it loops over the input until C is true.