# [−][src]Trait num::traits::cast::NumCast

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

An interface for casting between machine scalars.

## Required methods

### `fn from<T>(n: T) -> Option<Self> where
T: ToPrimitive,`

Creates a number from another value that can be converted into a primitive via the `ToPrimitive` trait.

Loading content...

## Implementations on Foreign Types

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

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

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

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

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

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

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

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

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

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

### `impl<T> NumCast for Wrapping<T> where
T: NumCast,` [src]

#### `fn from<U>(n: U) -> Option<Wrapping<T>> where
U: ToPrimitive,` [src]

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Loading content...

## Implementors

Loading content...

# Help

## Keyboard Shortcuts

`?`
  Show this help dialog
`S`
  Focus the search field
`↑`
  Move up in search results
`↓`
  Move down in search results
`↹`
  Switch tab
`⏎`
  Go to active search result
`+`
  Expand all sections
`-`
  Collapse all sections

## Search Tricks

Prefix searches with a type followed by a colon (e.g., `fn:`) to restrict the search to a given type.

Accepted types are: `fn`, `mod`, `struct`, `enum`, `trait`, `type`, `macro`, and `const`.

Search functions by type signature (e.g., `vec -> usize` or `* -> vec`)

Search multiple things at once by splitting your query with comma (e.g., `str,u8` or `String,struct:Vec,test`)