parcelona

minimalistic elegance parser combinator library

#[test]
fn t_color() {
use atoi::FromRadix16;

#[derive(Debug, PartialEq)]
pub struct Color {
  pub red: u8,
  pub green: u8,
  pub blue: u8,
}

let input = "#2F14DF".as_bytes();

let hex_color = take(seq(is_hex_digit,SeqCount::Exact(2)));
let (input,_) = take(starts_with(b"#")).parse(input).unwrap();
let (input,c) = hex_color.more(NO_ZERO).parse(input).unwrap();
let (r,_) = u8::from_radix_16(c[0]);
let (g,_) = u8::from_radix_16(c[1]);
let (b,_) = u8::from_radix_16(c[2]);
let color = Color{ red:r, green:g, blue:b };

assert_eq!(Color{red: 47, green: 20, blue: 223}, color);
}

how to parse utf8 &str ? use crate unicode-segmentation

doc

parser_combinator

This core of library and has parsers:

• data_end
• any
• start_with
• start_with_any
• seq

and has many parser combinators:

• not (parser)
• map (parser,Fn)
• option (parser)
• pair (parser,parser)
• left (parser,parser)
• right (parser,parser)
• left_opt (parser,parser)
• right_opt (parser,parser)
• more (parser,bool)
• alt ((tuple of rarsers))
• find (parser,parser)
• sep_pair (parser,parser,parser)
• between (parser,parser,parser)
• between_opt (parser,parser,parser)
• and_then (parser,parser,Fn)
• sep_list (parser,parser,parser)

u8

This functions for u8

u8ext

This parsers for &[u8]

examples

• See tests
• take_sni tls sni hand shake parsing