Trait CastFromAs 

pub trait CastFromAs {
    // Required methods
    fn from_i8(n: i8) -> Self;
    fn from_i16(n: i16) -> Self;
    fn from_i32(n: i32) -> Self;
    fn from_i64(n: i64) -> Self;
    fn from_isize(n: isize) -> Self;
    fn from_i128(n: i128) -> Self;
    fn from_u8(n: u8) -> Self;
    fn from_u16(n: u16) -> Self;
    fn from_u32(n: u32) -> Self;
    fn from_u64(n: u64) -> Self;
    fn from_usize(n: usize) -> Self;
    fn from_u128(n: u128) -> Self;
}

Available on crate feature cast_from_as only.

The CastFromAs trait for simple convert from value between integer types with possible overflow.

• No generic data type used in the trait definition.
• Easy implementation when used as a super trait.

Usage

Basic use of the trait.

use num_convert::CastFromAs;
assert_eq!(<i8 as CastFromAs>::from_u8(127_u8), 127_i8);
assert_eq!(<i8>::from_u8(255_u8), -1_i8);

Examples

assert_eq!(<i16>::from_i8(-128_i8), -128_i16);
assert_eq!(<i8>::from_u16(256_u16), 0_i8);

Required Methods

fn from_i8(n: i8) -> Self

Converts the value from i8 to Self. Overflow possible during conversion.

fn from_i16(n: i16) -> Self

Converts the value from i16 to Self. Overflow possible during conversion.

fn from_i32(n: i32) -> Self

Converts the value from i32 to Self. Overflow possible during conversion.

fn from_i64(n: i64) -> Self

Converts the value from i64 to Self. Overflow possible during conversion.

fn from_isize(n: isize) -> Self

Converts the value from isize to Self. Overflow possible during conversion.

fn from_i128(n: i128) -> Self

Converts the value from i128 to Self. Overflow possible during conversion.

fn from_u8(n: u8) -> Self

Converts the value from u8 to Self. Overflow possible during conversion.

fn from_u16(n: u16) -> Self

Converts the value from u16 to Self. Overflow possible during conversion.

fn from_u32(n: u32) -> Self

Converts the value from u32 to Self. Overflow possible during conversion.

fn from_u64(n: u64) -> Self

Converts the value from u64 to Self. Overflow possible during conversion.

fn from_usize(n: usize) -> Self

Converts the value from usize to Self. Overflow possible during conversion.

fn from_u128(n: u128) -> Self

Converts the value from u128 to Self. Overflow possible during conversion.

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 CastFromAs for i8

fn from_i8(n: i8) -> Self

Converts i8 to i8 losslessly.

fn from_u8(n: u8) -> Self

Converts u8 to i8 possible overflow.

fn from_i16(n: i16) -> Self

Converts i16 to i8 possible overflow.

fn from_u16(n: u16) -> Self

Converts u16 to i8 possible overflow.

fn from_i32(n: i32) -> Self

Converts i32 to i8 possible overflow.

fn from_u32(n: u32) -> Self

Converts u32 to i8 possible overflow.

fn from_i64(n: i64) -> Self

Converts i64 to i8 possible overflow.

fn from_u64(n: u64) -> Self

Converts u64 to i8 possible overflow.

fn from_isize(n: isize) -> Self

Converts isize to i8 possible overflow.

fn from_usize(n: usize) -> Self

Converts usize to i8 possible overflow.

fn from_i128(n: i128) -> Self

Converts i128 to i8 possible overflow.

fn from_u128(n: u128) -> Self

Converts u128 to i8 possible overflow.

impl CastFromAs for i16

fn from_i16(n: i16) -> Self

Converts i16 to i16 losslessly.

fn from_i8(n: i8) -> Self

Converts i8 to i16 losslessly.

fn from_u8(n: u8) -> Self

Converts u8 to i16 losslessly.

fn from_u16(n: u16) -> Self

Converts u16 to i16 possible overflow.

fn from_i32(n: i32) -> Self

Converts i32 to i16 possible overflow.

fn from_u32(n: u32) -> Self

Converts u32 to i16 possible overflow.

fn from_i64(n: i64) -> Self

Converts i64 to i16 possible overflow.

fn from_u64(n: u64) -> Self

Converts u64 to i16 possible overflow.

fn from_isize(n: isize) -> Self

Converts isize to i16 possible overflow.

fn from_usize(n: usize) -> Self

Converts usize to i16 possible overflow.

fn from_i128(n: i128) -> Self

Converts i128 to i16 possible overflow.

fn from_u128(n: u128) -> Self

Converts u128 to i16 possible overflow.

impl CastFromAs for i32

fn from_i32(n: i32) -> Self

Converts i32 to i32 losslessly.

fn from_i8(n: i8) -> Self

Converts i8 to i32 losslessly.

fn from_u8(n: u8) -> Self

Converts u8 to i32 losslessly.

fn from_i16(n: i16) -> Self

Converts i16 to i32 losslessly.

fn from_u16(n: u16) -> Self

Converts u16 to i32 losslessly.

fn from_u32(n: u32) -> Self

Converts u32 to i32 possible overflow.

fn from_i64(n: i64) -> Self

Converts i64 to i32 possible overflow.

fn from_u64(n: u64) -> Self

Converts u64 to i32 possible overflow.

fn from_isize(n: isize) -> Self

Converts isize to i32 possible overflow.

fn from_usize(n: usize) -> Self

Converts usize to i32 possible overflow.

fn from_i128(n: i128) -> Self

Converts i128 to i32 possible overflow.

fn from_u128(n: u128) -> Self

Converts u128 to i32 possible overflow.

impl CastFromAs for i64

fn from_i64(n: i64) -> Self

Converts i64 to i64 losslessly.

fn from_i8(n: i8) -> Self

Converts i8 to i64 losslessly.

fn from_u8(n: u8) -> Self

Converts u8 to i64 losslessly.

fn from_i16(n: i16) -> Self

Converts i16 to i64 losslessly.

fn from_u16(n: u16) -> Self

Converts u16 to i64 losslessly.

fn from_i32(n: i32) -> Self

Converts i32 to i64 losslessly.

fn from_u32(n: u32) -> Self

Converts u32 to i64 losslessly.

fn from_isize(n: isize) -> Self

Converts isize to i64 losslessly.

fn from_u64(n: u64) -> Self

Converts u64 to i64 possible overflow.

fn from_usize(n: usize) -> Self

Converts usize to i64 possible overflow.

fn from_i128(n: i128) -> Self

Converts i128 to i64 possible overflow.

fn from_u128(n: u128) -> Self

Converts u128 to i64 possible overflow.

impl CastFromAs for i128

fn from_i128(n: i128) -> Self

Converts i128 to i128 losslessly.

fn from_i8(n: i8) -> Self

Converts i8 to i128 losslessly.

fn from_u8(n: u8) -> Self

Converts u8 to i128 losslessly.

fn from_u16(n: u16) -> Self

Converts u16 to i128 losslessly.

fn from_i16(n: i16) -> Self

Converts i16 to i128 losslessly.

fn from_u32(n: u32) -> Self

Converts u32 to i128 losslessly.

fn from_i32(n: i32) -> Self

Converts i32 to i128 losslessly.

fn from_u64(n: u64) -> Self

Converts u64 to i128 losslessly.

fn from_i64(n: i64) -> Self

Converts i64 to i128 losslessly.

fn from_usize(n: usize) -> Self

Converts usize to i128 losslessly.

fn from_isize(n: isize) -> Self

Converts isize to i128 losslessly.

fn from_u128(n: u128) -> Self

Converts u128 to i128 possibly overflow.

impl CastFromAs for isize

fn from_isize(n: isize) -> Self

Converts isize to isize losslessly.

fn from_i8(n: i8) -> Self

Converts i8 to isize losslessly.

fn from_u8(n: u8) -> Self

Converts u8 to isize losslessly.

fn from_i16(n: i16) -> Self

Converts i16 to isize losslessly.

fn from_u16(n: u16) -> Self

Converts u16 to isize losslessly.

fn from_i32(n: i32) -> Self

Converts i32 to isize losslessly.

fn from_u32(n: u32) -> Self

Converts u32 to isize losslessly.

fn from_i64(n: i64) -> Self

Converts i64 to isize losslessly.

fn from_u64(n: u64) -> Self

Converts u64 to isize possibe overflow.

fn from_usize(n: usize) -> Self

Converts usize to isize possibe overflow.

fn from_i128(n: i128) -> Self

Converts i128 to isize possibe overflow.

fn from_u128(n: u128) -> Self

Converts u128 to isize possibe overflow.

impl CastFromAs for u8

fn from_u8(n: u8) -> Self

Converts u8 to u8 losslessly.

fn from_i8(n: i8) -> Self

Converts i8 to u8 possible overflow.

fn from_u16(n: u16) -> Self

Converts u16 to u8 possible overflow.

fn from_i16(n: i16) -> Self

Converts i16 to u8 possible overflow.

fn from_i32(n: i32) -> Self

Converts i32 to u8 possible overflow.

fn from_u32(n: u32) -> Self

Converts u32 to u8 possible overflow.

fn from_i64(n: i64) -> Self

Converts i64 to u8 possible overflow.

fn from_u64(n: u64) -> Self

Converts u64 to u8 possible overflow.

fn from_isize(n: isize) -> Self

Converts isize to u8 possible overflow.

fn from_usize(n: usize) -> Self

Converts usize to u8 possible overflow.

fn from_i128(n: i128) -> Self

Converts i128 to u8 possible overflow.

fn from_u128(n: u128) -> Self

Converts u128 to u8 possible overflow.

impl CastFromAs for u16

fn from_u16(n: u16) -> Self

Converts u16 to u16 losslessly.

fn from_u8(n: u8) -> Self

Converts u8 to u16 losslessly.

fn from_i8(n: i8) -> Self

Converts i8 to u16 possible overflow.

fn from_i16(n: i16) -> Self

Converts i16 to u16 possible overflow.

fn from_i32(n: i32) -> Self

Converts i32 to u16 possible overflow.

fn from_u32(n: u32) -> Self

Converts u32 to u16 possible overflow.

fn from_i64(n: i64) -> Self

Converts i64 to u16 possible overflow.

fn from_u64(n: u64) -> Self

Converts u64 to u16 possible overflow.

fn from_isize(n: isize) -> Self

Converts isize to u16 possible overflow.

fn from_usize(n: usize) -> Self

Converts usize to u16 possible overflow.

fn from_i128(n: i128) -> Self

Converts i128 to u16 possible overflow.

fn from_u128(n: u128) -> Self

Converts u128 to u16 possible overflow.

impl CastFromAs for u32

fn from_u32(n: u32) -> Self

Converts u32 to u32 losslessly.

fn from_u8(n: u8) -> Self

Converts u8 to u32 losslessly.

fn from_u16(n: u16) -> Self

Converts u16 to u32 losslessly.

fn from_i8(n: i8) -> Self

Converts i8 to u32 possible overflow.

fn from_i16(n: i16) -> Self

Converts i16 to u32 possible overflow.

fn from_i32(n: i32) -> Self

Converts i32 to u32 possible overflow.

fn from_i64(n: i64) -> Self

Converts i64 to u32 possible overflow.

fn from_u64(n: u64) -> Self

Converts u64 to u32 possible overflow.

fn from_isize(n: isize) -> Self

Converts isize to u32 possible overflow.

fn from_usize(n: usize) -> Self

Converts usize to u32 possible overflow.

fn from_i128(n: i128) -> Self

Converts i128 to u32 possible overflow.

fn from_u128(n: u128) -> Self

Converts u128 to u32 possible overflow.

impl CastFromAs for u64

fn from_u64(n: u64) -> Self

Converts u64 to u64 losslessly.

fn from_u8(n: u8) -> Self

Converts u8 to u64 losslessly.

fn from_u16(n: u16) -> Self

Converts u16 to u64 losslessly.

fn from_u32(n: u32) -> Self

Converts u32 to u64 losslessly.

fn from_usize(n: usize) -> Self

Converts usize to u64 losslessly.

fn from_i8(n: i8) -> Self

Converts i8 to u64 possible overflow.

fn from_i16(n: i16) -> Self

Converts i16 to u64 possible overflow.

fn from_i32(n: i32) -> Self

Converts i32 to u64 possible overflow.

fn from_i64(n: i64) -> Self

Converts i64 to u64 possible overflow.

fn from_isize(n: isize) -> Self

Converts isize to u64 possible overflow.

fn from_i128(n: i128) -> Self

Converts i128 to u64 possible overflow.

fn from_u128(n: u128) -> Self

Converts u128 to u64 possible overflow.

impl CastFromAs for u128

fn from_u128(n: u128) -> Self

Converts u128 to u128 losslessly.

fn from_u8(n: u8) -> Self

Converts u8 to u128 losslessly.

fn from_u16(n: u16) -> Self

Converts u16 to u128 losslessly.

fn from_u32(n: u32) -> Self

Converts u32 to u128 losslessly.

fn from_u64(n: u64) -> Self

Converts u64 to u128 losslessly.

fn from_usize(n: usize) -> Self

Converts usize to u128 losslessly.

fn from_i8(n: i8) -> Self

Converts i8 to u128 possible overflow.

fn from_i16(n: i16) -> Self

Converts i16 to u128 possible overflow.

fn from_i32(n: i32) -> Self

Converts i32 to u128 possible overflow.

fn from_i64(n: i64) -> Self

Converts i64 to u128 possible overflow.

fn from_isize(n: isize) -> Self

Converts isize to u128 possible overflow.

fn from_i128(n: i128) -> Self

Converts i128 to u128 possible overflow.

impl CastFromAs for usize

fn from_usize(n: usize) -> Self

Converts usize to usize losslessly.

fn from_u8(n: u8) -> Self

Converts u8 to usize losslessly.

fn from_u16(n: u16) -> Self

Converts u16 to usize losslessly.

fn from_u32(n: u32) -> Self

Converts u32 to usize losslessly.

fn from_u64(n: u64) -> Self

Converts u64 to usize losslessly.

fn from_i8(n: i8) -> Self

Converts i8 to usize possible overflow.

fn from_i16(n: i16) -> Self

Converts i16 to usize possible overflow.

fn from_i32(n: i32) -> Self

Converts i32 to usize possible overflow.

fn from_i64(n: i64) -> Self

Converts i64 to usize possible overflow.

fn from_isize(n: isize) -> Self

Converts isize to usize possible overflow.

fn from_i128(n: i128) -> Self

Converts i128 to usize possible overflow.

fn from_u128(n: u128) -> Self

Converts u128 to usize possible overflow.

Implementors