Trait CastSigned

pub trait CastSigned: Integer {
    type Signed;

    // Required method
    fn cast_signed(self) -> Self::Signed;
}

Cast to a signed integer of the same size.

This trait is implemented for all integers. Unsigned to signed casts are equivalent to 0.wrapping_add_signed(value), while signed to signed casts are an identity conversion.

assert_eq!(u8::MAX.cast_signed(), -1_i8);
assert_eq!(u16::MAX.cast_signed(), -1_i16);
assert_eq!(u32::MAX.cast_signed(), -1_i32);
assert_eq!(u64::MAX.cast_signed(), -1_i64);
assert_eq!(u128::MAX.cast_signed(), -1_i128);
assert_eq!(usize::MAX.cast_signed(), -1_isize);

assert_eq!(0_i8.cast_signed(), 0_i8);
assert_eq!(0_i16.cast_signed(), 0_i16);
assert_eq!(0_i32.cast_signed(), 0_i32);
assert_eq!(0_i64.cast_signed(), 0_i64);
assert_eq!(0_i128.cast_signed(), 0_i128);
assert_eq!(0_isize.cast_signed(), 0_isize);

Required Associated Types

type Signed

The signed integer type with the same size as Self.

Required Methods

fn cast_signed(self) -> Self::Signed

Cast an integer to the signed integer of the same size.

Implementations on Foreign Types

impl CastSigned for i8

type Signed = i8

fn cast_signed(self) -> Self::Signed

impl CastSigned for i16

type Signed = i16

fn cast_signed(self) -> Self::Signed

impl CastSigned for i32

type Signed = i32

fn cast_signed(self) -> Self::Signed

impl CastSigned for i64

type Signed = i64

fn cast_signed(self) -> Self::Signed

impl CastSigned for i128

type Signed = i128

fn cast_signed(self) -> Self::Signed

impl CastSigned for isize

type Signed = isize

fn cast_signed(self) -> Self::Signed

impl CastSigned for u8

type Signed = i8

fn cast_signed(self) -> Self::Signed

impl CastSigned for u16

type Signed = i16

fn cast_signed(self) -> Self::Signed

impl CastSigned for u32

type Signed = i32

fn cast_signed(self) -> Self::Signed

impl CastSigned for u64

type Signed = i64

fn cast_signed(self) -> Self::Signed

impl CastSigned for u128

type Signed = i128

fn cast_signed(self) -> Self::Signed

impl CastSigned for usize

type Signed = isize

fn cast_signed(self) -> Self::Signed

Implementors