[−][src]Trait num_traits::cast::NumCast

[+] Show declaration

pub trait NumCast: Sized + ToPrimitive {
    fn from<T: ToPrimitive>(n: T) -> Option<Self>;
}

[−]

An interface for casting between machine scalars.

Required methods

`fn from<T: ToPrimitive>(n: T) -> Option<Self>`[−]

Creates a number from another value that can be converted into a primitive via the ToPrimitive trait. If the source value cannot be represented by the target type, then None is returned.

A value can be represented by the target type when it lies within the range of scalars supported by the target type. For example, a negative integer cannot be represented by an unsigned integer type, and an i64 with a very high magnitude might not be convertible to an i32. On the other hand, conversions with possible precision loss or truncation are admitted, like an f32 with a decimal part to an integer type, or even a large f64 saturating to f32 infinity.

[−][src]Trait num_traits::cast::NumCast

Required methods

fn from<T: ToPrimitive>(n: T) -> Option<Self>[−]

Implementations on Foreign Types

impl<T: NumCast> NumCast for Wrapping<T>[src][−]

fn from<U: ToPrimitive>(n: U) -> Option<Self>[src]

Implementors

impl NumCast for f32[src][+]

fn from<N: ToPrimitive>(n: N) -> Option<f32>[src]

impl NumCast for f64[src][+]

fn from<N: ToPrimitive>(n: N) -> Option<f64>[src]

impl NumCast for i8[src][+]

fn from<N: ToPrimitive>(n: N) -> Option<i8>[src]

impl NumCast for i16[src][+]

fn from<N: ToPrimitive>(n: N) -> Option<i16>[src]

impl NumCast for i32[src][+]

fn from<N: ToPrimitive>(n: N) -> Option<i32>[src]

impl NumCast for i64[src][+]

fn from<N: ToPrimitive>(n: N) -> Option<i64>[src]

impl NumCast for i128[src][+]

fn from<N: ToPrimitive>(n: N) -> Option<i128>[src]

impl NumCast for isize[src][+]

fn from<N: ToPrimitive>(n: N) -> Option<isize>[src]

impl NumCast for u8[src][+]

fn from<N: ToPrimitive>(n: N) -> Option<u8>[src]

impl NumCast for u16[src][+]

fn from<N: ToPrimitive>(n: N) -> Option<u16>[src]

impl NumCast for u32[src][+]

fn from<N: ToPrimitive>(n: N) -> Option<u32>[src]

impl NumCast for u64[src][+]

fn from<N: ToPrimitive>(n: N) -> Option<u64>[src]

impl NumCast for u128[src][+]

fn from<N: ToPrimitive>(n: N) -> Option<u128>[src]

impl NumCast for usize[src][+]

fn from<N: ToPrimitive>(n: N) -> Option<usize>[src]

impl<T: NumCast + Num> NumCast for Complex<T>

`fn from<T: ToPrimitive>(n: T) -> Option<Self>`[−]

`impl<T: NumCast> NumCast for Wrapping<T>`[src][−]

`fn from<U: ToPrimitive>(n: U) -> Option<Self>`[src]

`impl NumCast for f32`[src][+]

`fn from<N: ToPrimitive>(n: N) -> Option<f32>`[src]

`impl NumCast for f64`[src][+]

`fn from<N: ToPrimitive>(n: N) -> Option<f64>`[src]

`impl NumCast for i8`[src][+]

`fn from<N: ToPrimitive>(n: N) -> Option<i8>`[src]

`impl NumCast for i16`[src][+]

`fn from<N: ToPrimitive>(n: N) -> Option<i16>`[src]

`impl NumCast for i32`[src][+]

`fn from<N: ToPrimitive>(n: N) -> Option<i32>`[src]

`impl NumCast for i64`[src][+]

`fn from<N: ToPrimitive>(n: N) -> Option<i64>`[src]

`impl NumCast for i128`[src][+]

`fn from<N: ToPrimitive>(n: N) -> Option<i128>`[src]

`impl NumCast for isize`[src][+]

`fn from<N: ToPrimitive>(n: N) -> Option<isize>`[src]

`impl NumCast for u8`[src][+]

`fn from<N: ToPrimitive>(n: N) -> Option<u8>`[src]

`impl NumCast for u16`[src][+]

`fn from<N: ToPrimitive>(n: N) -> Option<u16>`[src]

`impl NumCast for u32`[src][+]

`fn from<N: ToPrimitive>(n: N) -> Option<u32>`[src]

`impl NumCast for u64`[src][+]

`fn from<N: ToPrimitive>(n: N) -> Option<u64>`[src]

`impl NumCast for u128`[src][+]

`fn from<N: ToPrimitive>(n: N) -> Option<u128>`[src]

`impl NumCast for usize`[src][+]

`fn from<N: ToPrimitive>(n: N) -> Option<usize>`[src]

`impl<T: NumCast + Num> NumCast for Complex<T>`