std::convert::TryFrom - Rust
Description: API documentation for the Rust `TryFrom` trait in crate `std`.
Keywords: rust, rustlang, rust-lang, TryFrom

# 1.34.0[−][src]Trait std::convert::TryFrom

    pub trait TryFrom<T> {
        type Error;
        fn try_from(value: T) -> Result<Self, Self::Error>;
    }

Simple and safe type conversions that may fail in a controlled way under some circumstances. It is the reciprocal of `TryInto`.

This is useful when you are doing a type conversion that may trivially succeed but may also need special handling. For example, there is no way to convert an `i64` into an `i32` using the `From` trait, because an `i64` may contain a value that an `i32` cannot represent and so the conversion would lose data. This might be handled by truncating the `i64` to an `i32` (essentially giving the `i64`'s value modulo `i32::MAX`) or by simply returning `i32::MAX`, or by some other method. The `From` trait is intended for perfect conversions, so the `TryFrom` trait informs the programmer when a type conversion could go bad and lets them decide how to handle it.

# Generic Implementations

- `TryFrom<T> for U` implies `TryInto``<U> for T`
- `try_from` is reflexive, which means that `TryFrom<T> for T` is implemented and cannot fail -- the associated `Error` type for calling `T::try_from()` on a value of type `T` is `Infallible`. When the `!` type is stabilized `Infallible` and `!` will be equivalent.

`TryFrom<T>` can be implemented as follows:

    use std::convert::TryFrom;

    struct GreaterThanZero(i32);

    impl TryFrom<i32> for GreaterThanZero {
        type Error = &'static str;

        fn try_from(value: i32) -> Result<Self, Self::Error> {
            if value <= 0 {
                Err("GreaterThanZero only accepts value superior than zero!")
            } else {
                Ok(GreaterThanZero(value))
            }
        }
    }

Run

# Examples

As described, `i32` implements `TryFrom<``i64``>`:

    use std::convert::TryFrom;

    let big_number = 1_000_000_000_000i64;
    // Silently truncates `big_number`, requires detecting
    // and handling the truncation after the fact.
    let smaller_number = big_number as i32;
    assert_eq!(smaller_number, -727379968);

    // Returns an error because `big_number` is too big to
    // fit in an `i32`.
    let try_smaller_number = i32::try_from(big_number);
    assert!(try_smaller_number.is_err());

    // Returns `Ok(3)`.
    let try_successful_smaller_number = i32::try_from(3);
    assert!(try_successful_smaller_number.is_ok());

Run

## Associated Types

### `type Error`

The type returned in the event of a conversion error.

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## Required methods

### `fn try_from(value: T) -> Result<Self, Self::Error>`

Performs the conversion.

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## Implementors

### `impl TryFrom<i128> for isize`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i128) -> Result<isize, <isize as TryFrom<i128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i128> for usize`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i128) -> Result<usize, <usize as TryFrom<i128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i128> for i16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i128) -> Result<i16, <i16 as TryFrom<i128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i128> for i32`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i128) -> Result<i32, <i32 as TryFrom<i128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i128> for i64`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i128) -> Result<i64, <i64 as TryFrom<i128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i128> for i8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i128) -> Result<i8, <i8 as TryFrom<i128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i128> for u128`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i128) -> Result<u128, <u128 as TryFrom<i128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i128> for u16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i128) -> Result<u16, <u16 as TryFrom<i128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i128> for u32`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i128) -> Result<u32, <u32 as TryFrom<i128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i128> for u64`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i128) -> Result<u64, <u64 as TryFrom<i128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i128> for u8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i128) -> Result<u8, <u8 as TryFrom<i128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i128> for NonZeroI128`[src]

Attempts to convert `i128` to `NonZeroI128`.

#### `type Error = TryFromIntError`

#### `fn try_from(
value: i128
) -> Result<NonZeroI128, <NonZeroI128 as TryFrom<i128>>::Error>`[src]

### `impl TryFrom<i16> for usize`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i16) -> Result<usize, <usize as TryFrom<i16>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i16> for i8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i16) -> Result<i8, <i8 as TryFrom<i16>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i16> for u128`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i16) -> Result<u128, <u128 as TryFrom<i16>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i16> for u16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i16) -> Result<u16, <u16 as TryFrom<i16>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i16> for u32`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i16) -> Result<u32, <u32 as TryFrom<i16>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i16> for u64`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i16) -> Result<u64, <u64 as TryFrom<i16>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i16> for u8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i16) -> Result<u8, <u8 as TryFrom<i16>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i16> for NonZeroI16`[src]

Attempts to convert `i16` to `NonZeroI16`.

#### `type Error = TryFromIntError`

#### `fn try_from(
value: i16
) -> Result<NonZeroI16, <NonZeroI16 as TryFrom<i16>>::Error>`[src]

### `impl TryFrom<i32> for isize`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(value: i32) -> Result<isize, <isize as TryFrom<i32>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i32> for usize`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i32) -> Result<usize, <usize as TryFrom<i32>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i32> for i16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i32) -> Result<i16, <i16 as TryFrom<i32>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i32> for i8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i32) -> Result<i8, <i8 as TryFrom<i32>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i32> for u128`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i32) -> Result<u128, <u128 as TryFrom<i32>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i32> for u16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i32) -> Result<u16, <u16 as TryFrom<i32>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i32> for u32`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i32) -> Result<u32, <u32 as TryFrom<i32>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i32> for u64`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i32) -> Result<u64, <u64 as TryFrom<i32>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i32> for u8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i32) -> Result<u8, <u8 as TryFrom<i32>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i32> for NonZeroI32`[src]

Attempts to convert `i32` to `NonZeroI32`.

#### `type Error = TryFromIntError`

#### `fn try_from(
value: i32
) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<i32>>::Error>`[src]

### `impl TryFrom<i64> for isize`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(value: i64) -> Result<isize, <isize as TryFrom<i64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i64> for usize`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i64) -> Result<usize, <usize as TryFrom<i64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i64> for i16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i64) -> Result<i16, <i16 as TryFrom<i64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i64> for i32`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i64) -> Result<i32, <i32 as TryFrom<i64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i64> for i8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i64) -> Result<i8, <i8 as TryFrom<i64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i64> for u128`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i64) -> Result<u128, <u128 as TryFrom<i64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i64> for u16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i64) -> Result<u16, <u16 as TryFrom<i64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i64> for u32`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i64) -> Result<u32, <u32 as TryFrom<i64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i64> for u64`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i64) -> Result<u64, <u64 as TryFrom<i64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i64> for u8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i64) -> Result<u8, <u8 as TryFrom<i64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i64> for NonZeroI64`[src]

Attempts to convert `i64` to `NonZeroI64`.

#### `type Error = TryFromIntError`

#### `fn try_from(
value: i64
) -> Result<NonZeroI64, <NonZeroI64 as TryFrom<i64>>::Error>`[src]

### `impl TryFrom<i8> for usize`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i8) -> Result<usize, <usize as TryFrom<i8>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i8> for u128`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i8) -> Result<u128, <u128 as TryFrom<i8>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i8> for u16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i8) -> Result<u16, <u16 as TryFrom<i8>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i8> for u32`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i8) -> Result<u32, <u32 as TryFrom<i8>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i8> for u64`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i8) -> Result<u64, <u64 as TryFrom<i8>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i8> for u8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: i8) -> Result<u8, <u8 as TryFrom<i8>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<i8> for NonZeroI8`[src]

Attempts to convert `i8` to `NonZeroI8`.

#### `type Error = TryFromIntError`

#### `fn try_from(value: i8) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<i8>>::Error>`[src]

### `impl TryFrom<isize> for i128`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(value: isize) -> Result<i128, <i128 as TryFrom<isize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<isize> for i16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: isize) -> Result<i16, <i16 as TryFrom<isize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<isize> for i32`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: isize) -> Result<i32, <i32 as TryFrom<isize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<isize> for i64`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(value: isize) -> Result<i64, <i64 as TryFrom<isize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<isize> for i8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: isize) -> Result<i8, <i8 as TryFrom<isize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<isize> for u128`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: isize) -> Result<u128, <u128 as TryFrom<isize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<isize> for u16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: isize) -> Result<u16, <u16 as TryFrom<isize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<isize> for u32`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: isize) -> Result<u32, <u32 as TryFrom<isize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<isize> for u64`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: isize) -> Result<u64, <u64 as TryFrom<isize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<isize> for u8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: isize) -> Result<u8, <u8 as TryFrom<isize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<isize> for usize`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: isize) -> Result<usize, <usize as TryFrom<isize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<isize> for NonZeroIsize`[src]

Attempts to convert `isize` to `NonZeroIsize`.

#### `type Error = TryFromIntError`

#### `fn try_from(
value: isize
) -> Result<NonZeroIsize, <NonZeroIsize as TryFrom<isize>>::Error>`[src]

### `impl TryFrom<u128> for usize`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u128) -> Result<usize, <usize as TryFrom<u128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u128> for isize`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u128) -> Result<isize, <isize as TryFrom<u128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u128> for i128`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u128) -> Result<i128, <i128 as TryFrom<u128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u128> for i16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u128) -> Result<i16, <i16 as TryFrom<u128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u128> for i32`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u128) -> Result<i32, <i32 as TryFrom<u128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u128> for i64`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u128) -> Result<i64, <i64 as TryFrom<u128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u128> for i8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u128) -> Result<i8, <i8 as TryFrom<u128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u128> for u16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u128) -> Result<u16, <u16 as TryFrom<u128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u128> for u32`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u128) -> Result<u32, <u32 as TryFrom<u128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u128> for u64`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u128) -> Result<u64, <u64 as TryFrom<u128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u128> for u8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u128) -> Result<u8, <u8 as TryFrom<u128>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u128> for NonZeroU128`[src]

Attempts to convert `u128` to `NonZeroU128`.

#### `type Error = TryFromIntError`

#### `fn try_from(
value: u128
) -> Result<NonZeroU128, <NonZeroU128 as TryFrom<u128>>::Error>`[src]

### `impl TryFrom<u16> for isize`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(value: u16) -> Result<isize, <isize as TryFrom<u16>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u16> for i16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u16) -> Result<i16, <i16 as TryFrom<u16>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u16> for i8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u16) -> Result<i8, <i8 as TryFrom<u16>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u16> for u8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u16) -> Result<u8, <u8 as TryFrom<u16>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u16> for NonZeroU16`[src]

Attempts to convert `u16` to `NonZeroU16`.

#### `type Error = TryFromIntError`

#### `fn try_from(
value: u16
) -> Result<NonZeroU16, <NonZeroU16 as TryFrom<u16>>::Error>`[src]

### `impl TryFrom<u32> for usize`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(value: u32) -> Result<usize, <usize as TryFrom<u32>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u32> for char`[src]

#### `type Error = CharTryFromError`

#### `fn try_from(i: u32) -> Result<char, <char as TryFrom<u32>>::Error>`[src]

### `impl TryFrom<u32> for isize`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(value: u32) -> Result<isize, <isize as TryFrom<u32>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u32> for i16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u32) -> Result<i16, <i16 as TryFrom<u32>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u32> for i32`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u32) -> Result<i32, <i32 as TryFrom<u32>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u32> for i8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u32) -> Result<i8, <i8 as TryFrom<u32>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u32> for u16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u32) -> Result<u16, <u16 as TryFrom<u32>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u32> for u8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u32) -> Result<u8, <u8 as TryFrom<u32>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u32> for NonZeroU32`[src]

Attempts to convert `u32` to `NonZeroU32`.

#### `type Error = TryFromIntError`

#### `fn try_from(
value: u32
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<u32>>::Error>`[src]

### `impl TryFrom<u64> for isize`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u64) -> Result<isize, <isize as TryFrom<u64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u64> for usize`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(value: u64) -> Result<usize, <usize as TryFrom<u64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u64> for i16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u64) -> Result<i16, <i16 as TryFrom<u64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u64> for i32`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u64) -> Result<i32, <i32 as TryFrom<u64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u64> for i64`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u64) -> Result<i64, <i64 as TryFrom<u64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u64> for i8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u64) -> Result<i8, <i8 as TryFrom<u64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u64> for u16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u64) -> Result<u16, <u16 as TryFrom<u64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u64> for u32`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u64) -> Result<u32, <u32 as TryFrom<u64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u64> for u8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u64) -> Result<u8, <u8 as TryFrom<u64>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u64> for NonZeroU64`[src]

Attempts to convert `u64` to `NonZeroU64`.

#### `type Error = TryFromIntError`

#### `fn try_from(
value: u64
) -> Result<NonZeroU64, <NonZeroU64 as TryFrom<u64>>::Error>`[src]

### `impl TryFrom<u8> for i8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: u8) -> Result<i8, <i8 as TryFrom<u8>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<u8> for NonZeroU8`[src]

Attempts to convert `u8` to `NonZeroU8`.

#### `type Error = TryFromIntError`

#### `fn try_from(value: u8) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<u8>>::Error>`[src]

### `impl TryFrom<usize> for i128`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(value: usize) -> Result<i128, <i128 as TryFrom<usize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<usize> for i16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: usize) -> Result<i16, <i16 as TryFrom<usize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<usize> for i32`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: usize) -> Result<i32, <i32 as TryFrom<usize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<usize> for i64`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: usize) -> Result<i64, <i64 as TryFrom<usize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<usize> for i8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: usize) -> Result<i8, <i8 as TryFrom<usize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<usize> for isize`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: usize) -> Result<isize, <isize as TryFrom<usize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<usize> for u128`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(value: usize) -> Result<u128, <u128 as TryFrom<usize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<usize> for u16`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: usize) -> Result<u16, <u16 as TryFrom<usize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<usize> for u32`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: usize) -> Result<u32, <u32 as TryFrom<usize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<usize> for u64`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(value: usize) -> Result<u64, <u64 as TryFrom<usize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<usize> for u8`[src]

#### `type Error = TryFromIntError`

#### `fn try_from(u: usize) -> Result<u8, <u8 as TryFrom<usize>>::Error>`[src]

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

### `impl TryFrom<usize> for NonZeroUsize`[src]

Attempts to convert `usize` to `NonZeroUsize`.

#### `type Error = TryFromIntError`

#### `fn try_from(
value: usize
) -> Result<NonZeroUsize, <NonZeroUsize as TryFrom<usize>>::Error>`[src]

### `impl<'_, const N: usize, T> TryFrom<&'_ [T]> for [T; N] where
T: Copy,
[T; N]: LengthAtMost32,` [src]

#### `type Error = TryFromSliceError`

#### `fn try_from(slice: &[T]) -> Result<[T; N], TryFromSliceError>`[src]

### `impl<'a, const N: usize, T> TryFrom<&'a [T]> for &'a [T; N] where
[T; N]: LengthAtMost32,` [src]

#### `type Error = TryFromSliceError`

#### `fn try_from(slice: &[T]) -> Result<&[T; N], TryFromSliceError>`[src]

### `impl<'a, const N: usize, T> TryFrom<&'a mut [T]> for &'a mut [T; N] where
[T; N]: LengthAtMost32,` [src]

#### `type Error = TryFromSliceError`

#### `fn try_from(slice: &mut [T]) -> Result<&mut [T; N], TryFromSliceError>`[src]

### `impl<T, U> TryFrom<U> for T where
U: Into<T>,` [src]

#### `type Error = Infallible`

#### `fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>`[src]

### `impl<const N: usize, T> TryFrom<Box<[T]>> for Box<[T; N]> where
[T; N]: LengthAtMost32,` [src]

#### `type Error = Box<[T]>`

#### `fn try_from(
boxed_slice: Box<[T]>
) -> Result<Box<[T; N]>, <Box<[T; N]> as TryFrom<Box<[T]>>>::Error>`[src]

### `impl<const N: usize, T> TryFrom<Rc<[T]>> for Rc<[T; N]> where
[T; N]: LengthAtMost32,` [src]

#### `type Error = Rc<[T]>`

#### `fn try_from(
boxed_slice: Rc<[T]>
) -> Result<Rc<[T; N]>, <Rc<[T; N]> as TryFrom<Rc<[T]>>>::Error>`[src]

### `impl<const N: usize, T> TryFrom<Arc<[T]>> for Arc<[T; N]> where
[T; N]: LengthAtMost32,` [src]

#### `type Error = Arc<[T]>`

#### `fn try_from(
boxed_slice: Arc<[T]>
) -> Result<Arc<[T; N]>, <Arc<[T; N]> as TryFrom<Arc<[T]>>>::Error>`[src]

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