combine::parser::choice
pub fn or<P1, P2>(p1: P1, p2: P2) -> Or<P1, P2> where P1: Parser, P2: Parser<Input = P1::Input, Output = P1::Output>,
Equivalent to p1.or(p2).
p1.or(p2)
If you are looking to chain 3 or more parsers using or you may consider using the choice! macro instead, which can be clearer and may result in a faster parser.
or
choice!