1 #![cfg_attr(not(feature = "std"), no_std)]
2
3 #[cfg(not(feature = "std"))]
4 use core::str;
5
6 #[cfg(feature = "std")]
7 use std::str;
8
9 use combine::{
10 error::UnexpectedParse,
11 parser::{
12 byte::digit,
13 choice::optional,
14 range::recognize,
15 repeat::{skip_many, skip_many1},
16 token::token,
17 },
18 Parser,
19 };
20
main()21 fn main() {
22 let mut parser = recognize((
23 skip_many1(digit()),
24 optional((token(b'.'), skip_many(digit()))),
25 ))
26 .and_then(|bs: &[u8]| {
27 // `bs` only contains digits which are ascii and thus UTF-8
28 let s = unsafe { str::from_utf8_unchecked(bs) };
29 s.parse::<f64>().map_err(|_| UnexpectedParse::Unexpected)
30 });
31 let result = parser.parse(&b"123.45"[..]);
32 assert_eq!(result, Ok((123.45, &b""[..])));
33 }
34