Trait atoi::FromRadix10Signed

source · [−]
pub trait FromRadix10Signed: Sized {
    fn from_radix_10_signed(_: &[u8]) -> (Self, usize);
}
Expand description

Types implementing this trait can be parsed from a positional numeral system with radix 10. This trait allows for an additional sign character (+ or -) in front of the actual number in order, to allow for parsing negative values.

Required Methods

Parses an integer from a slice.

Example
use atoi::FromRadix10Signed;
// Parsing to digits from a slice
assert_eq!((42,2), i32::from_radix_10_signed(b"42"));
// Additional bytes after the number are ignored
assert_eq!((42,2), i32::from_radix_10_signed(b"42 is the answer to life, the universe and everything"));
// (0,0) is returned if the slice does not start with a digit
assert_eq!((0,0), i32::from_radix_10_signed(b"Sadly we do not know the question"));
// Signs are allowed
assert_eq!((-42,3), i32::from_radix_10_signed(b"-42"));
// Signs are allowed
assert_eq!((42,3), i32::from_radix_10_signed(b"+42"));
// Even on unsigned types.
assert_eq!((0,2), u32::from_radix_10_signed(b"-0"));
// Leading zeros are allowed
assert_eq!((42,4), i32::from_radix_10_signed(b"0042"));
Return

Returns a tuple with two numbers. The first is the integer parsed or zero, the second is the index of the byte right after the parsed number. If the second element is zero the slice did not start with an ASCII digit.

Implementors