Function core::num::dec2flt::num::from_str_unchecked [−] [src]

pub fn from_str_unchecked<'a, T>(bytes: T) -> u64 where T: IntoIterator<Item=&'a u8>
Unstable (dec2flt)

: internal routines only exposed for testing

Convert an ASCII string containing only decimal digits to a u64.

Does not perform checks for overflow or invalid characters, so if the caller is not careful, the result is bogus and can panic (though it won't be unsafe). Additionally, empty strings are treated as zero. This function exists because

  1. using FromStr on &[u8] requires from_utf8_unchecked, which is bad, and
  2. piecing together the results of integral.parse() and fractional.parse() is more complicated than this entire function.