pub trait ConstantTimeLess: ConstantTimeEq + ConstantTimeGreater {
// Provided method
fn ct_lt(&self, other: &Self) -> Choice { ... }
}Expand description
A type which can be compared in some manner and be determined to be less than another of the same type.
Provided Methods§
Sourcefn ct_lt(&self, other: &Self) -> Choice
fn ct_lt(&self, other: &Self) -> Choice
Determine whether self < other.
The bitwise-NOT of the return value of this function should be usable to
determine if self >= other.
A default implementation is provided and implemented for the unsigned integer types.
This function should execute in constant time.
§Returns
A Choice with a set bit if self < other, and with no set bits
otherwise.
§Example
use subtle::ConstantTimeLess;
let x: u8 = 13;
let y: u8 = 42;
let x_lt_y = x.ct_lt(&y);
assert_eq!(x_lt_y.unwrap_u8(), 1);
let y_lt_x = y.ct_lt(&x);
assert_eq!(y_lt_x.unwrap_u8(), 0);
let x_lt_x = x.ct_lt(&x);
assert_eq!(x_lt_x.unwrap_u8(), 0);Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.