# [−][src]Trait num::cast::ToPrimitive

    pub trait ToPrimitive {
        fn to_i64(&self) -> Option<i64>;
        fn to_u64(&self) -> Option<u64>;

        fn to_isize(&self) -> Option<isize> { ... }
        fn to_i8(&self) -> Option<i8> { ... }
        fn to_i16(&self) -> Option<i16> { ... }
        fn to_i32(&self) -> Option<i32> { ... }
        fn to_i128(&self) -> Option<i128> { ... }
        fn to_usize(&self) -> Option<usize> { ... }
        fn to_u8(&self) -> Option<u8> { ... }
        fn to_u16(&self) -> Option<u16> { ... }
        fn to_u32(&self) -> Option<u32> { ... }
        fn to_u128(&self) -> Option<u128> { ... }
        fn to_f32(&self) -> Option<f32> { ... }
        fn to_f64(&self) -> Option<f64> { ... }
    }

A generic trait for converting a value to a number.

## Required methods

### `fn to_i64(&self) -> Option<i64>`

Converts the value of `self` to an `i64`.

### `fn to_u64(&self) -> Option<u64>`

Converts the value of `self` to an `u64`.

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## Provided methods

### `fn to_isize(&self) -> Option<isize>`

Converts the value of `self` to an `isize`.

### `fn to_i8(&self) -> Option<i8>`

Converts the value of `self` to an `i8`.

### `fn to_i16(&self) -> Option<i16>`

Converts the value of `self` to an `i16`.

### `fn to_i32(&self) -> Option<i32>`

Converts the value of `self` to an `i32`.

### `fn to_i128(&self) -> Option<i128>`

Converts the value of `self` to an `i128`.

This method is only available with feature `i128` enabled on Rust >= 1.26.

The default implementation converts through `to_i64()`. Types implementing this trait should override this method if they can represent a greater range.

### `fn to_usize(&self) -> Option<usize>`

Converts the value of `self` to a `usize`.

### `fn to_u8(&self) -> Option<u8>`

Converts the value of `self` to an `u8`.

### `fn to_u16(&self) -> Option<u16>`

Converts the value of `self` to an `u16`.

### `fn to_u32(&self) -> Option<u32>`

Converts the value of `self` to an `u32`.

### `fn to_u128(&self) -> Option<u128>`

Converts the value of `self` to an `u128`.

This method is only available with feature `i128` enabled on Rust >= 1.26.

The default implementation converts through `to_u64()`. Types implementing this trait should override this method if they can represent a greater range.

### `fn to_f32(&self) -> Option<f32>`

Converts the value of `self` to an `f32`.

### `fn to_f64(&self) -> Option<f64>`

Converts the value of `self` to an `f64`.

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## Implementations on Foreign Types

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

#### `fn to_isize(&self) -> Option<isize>`[src]

#### `fn to_i8(&self) -> Option<i8>`[src]

#### `fn to_i16(&self) -> Option<i16>`[src]

#### `fn to_i32(&self) -> Option<i32>`[src]

#### `fn to_i64(&self) -> Option<i64>`[src]

#### `fn to_i128(&self) -> Option<i128>`[src]

#### `fn to_usize(&self) -> Option<usize>`[src]

#### `fn to_u8(&self) -> Option<u8>`[src]

#### `fn to_u16(&self) -> Option<u16>`[src]

#### `fn to_u32(&self) -> Option<u32>`[src]

#### `fn to_u64(&self) -> Option<u64>`[src]

#### `fn to_u128(&self) -> Option<u128>`[src]

#### `fn to_f32(&self) -> Option<f32>`[src]

#### `fn to_f64(&self) -> Option<f64>`[src]

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

#### `fn to_isize(&self) -> Option<isize>`[src]

#### `fn to_i8(&self) -> Option<i8>`[src]

#### `fn to_i16(&self) -> Option<i16>`[src]

#### `fn to_i32(&self) -> Option<i32>`[src]

#### `fn to_i64(&self) -> Option<i64>`[src]

#### `fn to_i128(&self) -> Option<i128>`[src]

#### `fn to_usize(&self) -> Option<usize>`[src]

#### `fn to_u8(&self) -> Option<u8>`[src]

#### `fn to_u16(&self) -> Option<u16>`[src]

#### `fn to_u32(&self) -> Option<u32>`[src]

#### `fn to_u64(&self) -> Option<u64>`[src]

#### `fn to_u128(&self) -> Option<u128>`[src]

#### `fn to_f32(&self) -> Option<f32>`[src]

#### `fn to_f64(&self) -> Option<f64>`[src]

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

#### `fn to_isize(&self) -> Option<isize>`[src]

#### `fn to_i8(&self) -> Option<i8>`[src]

#### `fn to_i16(&self) -> Option<i16>`[src]

#### `fn to_i32(&self) -> Option<i32>`[src]

#### `fn to_i64(&self) -> Option<i64>`[src]

#### `fn to_i128(&self) -> Option<i128>`[src]

#### `fn to_usize(&self) -> Option<usize>`[src]

#### `fn to_u8(&self) -> Option<u8>`[src]

#### `fn to_u16(&self) -> Option<u16>`[src]

#### `fn to_u32(&self) -> Option<u32>`[src]

#### `fn to_u64(&self) -> Option<u64>`[src]

#### `fn to_u128(&self) -> Option<u128>`[src]

#### `fn to_f32(&self) -> Option<f32>`[src]

#### `fn to_f64(&self) -> Option<f64>`[src]

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

#### `fn to_isize(&self) -> Option<isize>`[src]

#### `fn to_i8(&self) -> Option<i8>`[src]

#### `fn to_i16(&self) -> Option<i16>`[src]

#### `fn to_i32(&self) -> Option<i32>`[src]

#### `fn to_i64(&self) -> Option<i64>`[src]

#### `fn to_i128(&self) -> Option<i128>`[src]

#### `fn to_usize(&self) -> Option<usize>`[src]

#### `fn to_u8(&self) -> Option<u8>`[src]

#### `fn to_u16(&self) -> Option<u16>`[src]

#### `fn to_u32(&self) -> Option<u32>`[src]

#### `fn to_u64(&self) -> Option<u64>`[src]

#### `fn to_u128(&self) -> Option<u128>`[src]

#### `fn to_f32(&self) -> Option<f32>`[src]

#### `fn to_f64(&self) -> Option<f64>`[src]

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

#### `fn to_isize(&self) -> Option<isize>`[src]

#### `fn to_i8(&self) -> Option<i8>`[src]

#### `fn to_i16(&self) -> Option<i16>`[src]

#### `fn to_i32(&self) -> Option<i32>`[src]

#### `fn to_i64(&self) -> Option<i64>`[src]

#### `fn to_i128(&self) -> Option<i128>`[src]

#### `fn to_usize(&self) -> Option<usize>`[src]

#### `fn to_u8(&self) -> Option<u8>`[src]

#### `fn to_u16(&self) -> Option<u16>`[src]

#### `fn to_u32(&self) -> Option<u32>`[src]

#### `fn to_u64(&self) -> Option<u64>`[src]

#### `fn to_u128(&self) -> Option<u128>`[src]

#### `fn to_f32(&self) -> Option<f32>`[src]

#### `fn to_f64(&self) -> Option<f64>`[src]

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

#### `fn to_isize(&self) -> Option<isize>`[src]

#### `fn to_i8(&self) -> Option<i8>`[src]

#### `fn to_i16(&self) -> Option<i16>`[src]

#### `fn to_i32(&self) -> Option<i32>`[src]

#### `fn to_i64(&self) -> Option<i64>`[src]

#### `fn to_i128(&self) -> Option<i128>`[src]

#### `fn to_usize(&self) -> Option<usize>`[src]

#### `fn to_u8(&self) -> Option<u8>`[src]

#### `fn to_u16(&self) -> Option<u16>`[src]

#### `fn to_u32(&self) -> Option<u32>`[src]

#### `fn to_u64(&self) -> Option<u64>`[src]

#### `fn to_u128(&self) -> Option<u128>`[src]

#### `fn to_f32(&self) -> Option<f32>`[src]

#### `fn to_f64(&self) -> Option<f64>`[src]

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

#### `fn to_isize(&self) -> Option<isize>`[src]

#### `fn to_i8(&self) -> Option<i8>`[src]

#### `fn to_i16(&self) -> Option<i16>`[src]

#### `fn to_i32(&self) -> Option<i32>`[src]

#### `fn to_i64(&self) -> Option<i64>`[src]

#### `fn to_i128(&self) -> Option<i128>`[src]

#### `fn to_usize(&self) -> Option<usize>`[src]

#### `fn to_u8(&self) -> Option<u8>`[src]

#### `fn to_u16(&self) -> Option<u16>`[src]

#### `fn to_u32(&self) -> Option<u32>`[src]

#### `fn to_u64(&self) -> Option<u64>`[src]

#### `fn to_u128(&self) -> Option<u128>`[src]

#### `fn to_f32(&self) -> Option<f32>`[src]

#### `fn to_f64(&self) -> Option<f64>`[src]

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

#### `fn to_isize(&self) -> Option<isize>`[src]

#### `fn to_i8(&self) -> Option<i8>`[src]

#### `fn to_i16(&self) -> Option<i16>`[src]

#### `fn to_i32(&self) -> Option<i32>`[src]

#### `fn to_i64(&self) -> Option<i64>`[src]

#### `fn to_i128(&self) -> Option<i128>`[src]

#### `fn to_usize(&self) -> Option<usize>`[src]

#### `fn to_u8(&self) -> Option<u8>`[src]

#### `fn to_u16(&self) -> Option<u16>`[src]

#### `fn to_u32(&self) -> Option<u32>`[src]

#### `fn to_u64(&self) -> Option<u64>`[src]

#### `fn to_u128(&self) -> Option<u128>`[src]

#### `fn to_f32(&self) -> Option<f32>`[src]

#### `fn to_f64(&self) -> Option<f64>`[src]

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

#### `fn to_isize(&self) -> Option<isize>`[src]

#### `fn to_i8(&self) -> Option<i8>`[src]

#### `fn to_i16(&self) -> Option<i16>`[src]

#### `fn to_i32(&self) -> Option<i32>`[src]

#### `fn to_i64(&self) -> Option<i64>`[src]

#### `fn to_i128(&self) -> Option<i128>`[src]

#### `fn to_usize(&self) -> Option<usize>`[src]

#### `fn to_u8(&self) -> Option<u8>`[src]

#### `fn to_u16(&self) -> Option<u16>`[src]

#### `fn to_u32(&self) -> Option<u32>`[src]

#### `fn to_u64(&self) -> Option<u64>`[src]

#### `fn to_u128(&self) -> Option<u128>`[src]

#### `fn to_f32(&self) -> Option<f32>`[src]

#### `fn to_f64(&self) -> Option<f64>`[src]

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

#### `fn to_isize(&self) -> Option<isize>`[src]

#### `fn to_i8(&self) -> Option<i8>`[src]

#### `fn to_i16(&self) -> Option<i16>`[src]

#### `fn to_i32(&self) -> Option<i32>`[src]

#### `fn to_i64(&self) -> Option<i64>`[src]

#### `fn to_i128(&self) -> Option<i128>`[src]

#### `fn to_usize(&self) -> Option<usize>`[src]

#### `fn to_u8(&self) -> Option<u8>`[src]

#### `fn to_u16(&self) -> Option<u16>`[src]

#### `fn to_u32(&self) -> Option<u32>`[src]

#### `fn to_u64(&self) -> Option<u64>`[src]

#### `fn to_u128(&self) -> Option<u128>`[src]

#### `fn to_f32(&self) -> Option<f32>`[src]

#### `fn to_f64(&self) -> Option<f64>`[src]

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

#### `fn to_isize(&self) -> Option<isize>`[src]

#### `fn to_i8(&self) -> Option<i8>`[src]

#### `fn to_i16(&self) -> Option<i16>`[src]

#### `fn to_i32(&self) -> Option<i32>`[src]

#### `fn to_i64(&self) -> Option<i64>`[src]

#### `fn to_i128(&self) -> Option<i128>`[src]

#### `fn to_usize(&self) -> Option<usize>`[src]

#### `fn to_u8(&self) -> Option<u8>`[src]

#### `fn to_u16(&self) -> Option<u16>`[src]

#### `fn to_u32(&self) -> Option<u32>`[src]

#### `fn to_u64(&self) -> Option<u64>`[src]

#### `fn to_u128(&self) -> Option<u128>`[src]

#### `fn to_f32(&self) -> Option<f32>`[src]

#### `fn to_f64(&self) -> Option<f64>`[src]

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

#### `fn to_isize(&self) -> Option<isize>`[src]

#### `fn to_i8(&self) -> Option<i8>`[src]

#### `fn to_i16(&self) -> Option<i16>`[src]

#### `fn to_i32(&self) -> Option<i32>`[src]

#### `fn to_i64(&self) -> Option<i64>`[src]

#### `fn to_i128(&self) -> Option<i128>`[src]

#### `fn to_usize(&self) -> Option<usize>`[src]

#### `fn to_u8(&self) -> Option<u8>`[src]

#### `fn to_u16(&self) -> Option<u16>`[src]

#### `fn to_u32(&self) -> Option<u32>`[src]

#### `fn to_u64(&self) -> Option<u64>`[src]

#### `fn to_u128(&self) -> Option<u128>`[src]

#### `fn to_f32(&self) -> Option<f32>`[src]

#### `fn to_f64(&self) -> Option<f64>`[src]

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

#### `fn to_isize(&self) -> Option<isize>`[src]

#### `fn to_i8(&self) -> Option<i8>`[src]

#### `fn to_i16(&self) -> Option<i16>`[src]

#### `fn to_i32(&self) -> Option<i32>`[src]

#### `fn to_i64(&self) -> Option<i64>`[src]

#### `fn to_i128(&self) -> Option<i128>`[src]

#### `fn to_usize(&self) -> Option<usize>`[src]

#### `fn to_u8(&self) -> Option<u8>`[src]

#### `fn to_u16(&self) -> Option<u16>`[src]

#### `fn to_u32(&self) -> Option<u32>`[src]

#### `fn to_u64(&self) -> Option<u64>`[src]

#### `fn to_u128(&self) -> Option<u128>`[src]

#### `fn to_f32(&self) -> Option<f32>`[src]

#### `fn to_f64(&self) -> Option<f64>`[src]

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

#### `fn to_isize(&self) -> Option<isize>`[src]

#### `fn to_i8(&self) -> Option<i8>`[src]

#### `fn to_i16(&self) -> Option<i16>`[src]

#### `fn to_i32(&self) -> Option<i32>`[src]

#### `fn to_i64(&self) -> Option<i64>`[src]

#### `fn to_i128(&self) -> Option<i128>`[src]

#### `fn to_usize(&self) -> Option<usize>`[src]

#### `fn to_u8(&self) -> Option<u8>`[src]

#### `fn to_u16(&self) -> Option<u16>`[src]

#### `fn to_u32(&self) -> Option<u32>`[src]

#### `fn to_u64(&self) -> Option<u64>`[src]

#### `fn to_u128(&self) -> Option<u128>`[src]

#### `fn to_f32(&self) -> Option<f32>`[src]

#### `fn to_f64(&self) -> Option<f64>`[src]

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

#### `fn to_isize(&self) -> Option<isize>`[src]

#### `fn to_i8(&self) -> Option<i8>`[src]

#### `fn to_i16(&self) -> Option<i16>`[src]

#### `fn to_i32(&self) -> Option<i32>`[src]

#### `fn to_i64(&self) -> Option<i64>`[src]

#### `fn to_i128(&self) -> Option<i128>`[src]

#### `fn to_usize(&self) -> Option<usize>`[src]

#### `fn to_u8(&self) -> Option<u8>`[src]

#### `fn to_u16(&self) -> Option<u16>`[src]

#### `fn to_u32(&self) -> Option<u32>`[src]

#### `fn to_u64(&self) -> Option<u64>`[src]

#### `fn to_u128(&self) -> Option<u128>`[src]

#### `fn to_f32(&self) -> Option<f32>`[src]

#### `fn to_f64(&self) -> Option<f64>`[src]

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## Implementors

### `impl ToPrimitive for BigInt`[src]

#### `fn to_i64(&self) -> Option<i64>`[src]

#### `fn to_u64(&self) -> Option<u64>`[src]

#### `fn to_f32(&self) -> Option<f32>`[src]

#### `fn to_f64(&self) -> Option<f64>`[src]

### `impl ToPrimitive for BigUint`[src]

#### `fn to_i64(&self) -> Option<i64>`[src]

#### `fn to_u64(&self) -> Option<u64>`[src]

#### `fn to_f32(&self) -> Option<f32>`[src]

#### `fn to_f64(&self) -> Option<f64>`[src]

Loading content...

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