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

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>`[src]

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.

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Implementations on Foreign Types

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

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

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Implementors

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