cpp_synom

Macro punct

Source 
macro_rules! punct {
    ($i:expr, $punct:expr) => { ... };
}
Expand description

Parse a piece of punctuation like “+” or “+=”.

See also keyword! for parsing keywords, which are subtly different from punctuation.

  • Syntax: punct!("...")
  • Output: &str
extern crate syn;
#[macro_use] extern crate synom;

// Parse zero or more bangs.
named!(many_bangs -> Vec<&str>,
    many0!(punct!("!"))
);

fn main() {
    let input = "!! !";
    let parsed = many_bangs(input).expect("bangs");
    assert_eq!(parsed, ["!", "!", "!"]);
}