Trait SmallSigned 

pub trait SmallSigned {
    // Required methods
    fn isize(&self) -> isize;
    fn checked_from(num: isize) -> Self;
}

Convenience trait for signed normalization (e.g. to/from isize).

Required Methods

fn isize(&self) -> isize

Upcast: Get value of small signed as host register-width signed (e.g. isize)

fn checked_from(num: isize) -> Self

Downcast: Convert input isize into a primitive implementing the SmallSigned trait. Panics if isize exceeds min/max for returned signed primitive. core::convert::From not used b/c SmallSigned is not generic by design, implemented only for (i8, i16, i32, i64, i128) and only up to host integer width.

Note

Unlike others, this API has a tiny (1 comparison/branch) runtime cost. The check in checked_from is an assert to prevent loss of precision.

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.

Implementations on Foreign Types

impl SmallSigned for i8

fn isize(&self) -> isize

fn checked_from(num: isize) -> Self

impl SmallSigned for i16

fn isize(&self) -> isize

fn checked_from(num: isize) -> Self

impl SmallSigned for i32

fn isize(&self) -> isize

fn checked_from(num: isize) -> Self

impl SmallSigned for isize

fn isize(&self) -> isize

fn checked_from(num: isize) -> isize

Implementors