Function chomp::ascii::float [−] [src]

pub fn float<I: Input<Token = u8>, F: Float<I::Buffer>>(
    i: I
) -> SimpleResult<I, F>

Parses a float into a f64 or f32, will error with an Error::unexpected if the float does not map to a proper float.

Supports the format /[+-]?[0-9]+(\.[0-9]+)?([eE][+-]?[0-9]+)/

NOTE: Currently requires an allocation due to being generic over Input::Buffer and internally Rust's f32 requires a &str to be able to parse. If the nightly compiler is used the Float trait implementation for f32 and f64 will be specialized if the Buffer is &[u8] and will not require an allocation.

use chomp::parse_only;
use chomp::ascii::float;

assert_eq!(parse_only(float, &b"3.14159265359"[..]), Ok(3.14159265359));