Function combine::parser::char::spaces

pub fn spaces<Input>() -> impl Parser<Input, Output = ()> where
    Input: Stream<Token = char>,
    Input::Error: ParseError<Input::Token, Input::Range, Input::Position>, 

Skips over zero or more spaces according to std::char::is_whitespace.

This includes space characters, tabs and newlines.

use combine::Parser;
use combine::parser::char::spaces;
assert_eq!(spaces().parse(""), Ok(((), "")));
assert_eq!(spaces().parse("   "), Ok(((), "")));