Trait nom::lib::std::convert::TryFrom

pub trait TryFrom<T> {
    type Error;
    pub 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))
        }
    }
}

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());

Associated Types

type Error

The type returned in the event of a conversion error.

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Required methods

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

Performs the conversion.

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Implementations on Foreign Types

impl TryFrom<NonZeroU128> for NonZeroU32

Attempts to convert NonZeroU128 to NonZeroU32.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU128
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroU128>>::Error>

impl TryFrom<NonZeroI32> for NonZeroUsize

Attempts to convert NonZeroI32 to NonZeroUsize.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI32
) -> Result<NonZeroUsize, <NonZeroUsize as TryFrom<NonZeroI32>>::Error>

impl TryFrom<u32> for i8

type Error = TryFromIntError

pub fn try_from(u: u32) -> Result<i8, <i8 as TryFrom<u32>>::Error>

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 usize

type Error = TryFromIntError

pub fn try_from(u: i8) -> Result<usize, <usize as TryFrom<i8>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: i16) -> Result<u128, <u128 as TryFrom<i16>>::Error>

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<NonZeroU128> for NonZeroI64

Attempts to convert NonZeroU128 to NonZeroI64.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU128
) -> Result<NonZeroI64, <NonZeroI64 as TryFrom<NonZeroU128>>::Error>

impl TryFrom<NonZeroUsize> for NonZeroU8

Attempts to convert NonZeroUsize to NonZeroU8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroUsize
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroUsize>>::Error>

impl TryFrom<isize> for i16

type Error = TryFromIntError

pub fn try_from(u: isize) -> Result<i16, <i16 as TryFrom<isize>>::Error>

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<NonZeroU32> for NonZeroI32

Attempts to convert NonZeroU32 to NonZeroI32.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU32
) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<NonZeroU32>>::Error>

impl TryFrom<isize> for i8

type Error = TryFromIntError

pub fn try_from(u: isize) -> Result<i8, <i8 as TryFrom<isize>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: u16) -> Result<u8, <u8 as TryFrom<u16>>::Error>

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<NonZeroUsize> for NonZeroI32

Attempts to convert NonZeroUsize to NonZeroI32.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroUsize
) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<NonZeroUsize>>::Error>

impl TryFrom<NonZeroUsize> for NonZeroI8

Attempts to convert NonZeroUsize to NonZeroI8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroUsize
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroUsize>>::Error>

impl TryFrom<i128> for i32

type Error = TryFromIntError

pub fn try_from(u: i128) -> Result<i32, <i32 as TryFrom<i128>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: i32) -> Result<u16, <u16 as TryFrom<i32>>::Error>

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<NonZeroI32> for NonZeroI8

Attempts to convert NonZeroI32 to NonZeroI8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI32
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroI32>>::Error>

impl TryFrom<usize> for u32

type Error = TryFromIntError

pub fn try_from(u: usize) -> Result<u32, <u32 as TryFrom<usize>>::Error>

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<NonZeroI16> for NonZeroU16

Attempts to convert NonZeroI16 to NonZeroU16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI16
) -> Result<NonZeroU16, <NonZeroU16 as TryFrom<NonZeroI16>>::Error>

impl TryFrom<NonZeroI64> for NonZeroUsize

Attempts to convert NonZeroI64 to NonZeroUsize.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI64
) -> Result<NonZeroUsize, <NonZeroUsize as TryFrom<NonZeroI64>>::Error>

impl TryFrom<NonZeroI16> for NonZeroUsize

Attempts to convert NonZeroI16 to NonZeroUsize.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI16
) -> Result<NonZeroUsize, <NonZeroUsize as TryFrom<NonZeroI16>>::Error>

impl TryFrom<isize> for u64

type Error = TryFromIntError

pub fn try_from(u: isize) -> Result<u64, <u64 as TryFrom<isize>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: u16) -> Result<i16, <i16 as TryFrom<u16>>::Error>

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<NonZeroIsize> for NonZeroI16

Attempts to convert NonZeroIsize to NonZeroI16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroIsize
) -> Result<NonZeroI16, <NonZeroI16 as TryFrom<NonZeroIsize>>::Error>

impl TryFrom<u32> for usize

type Error = TryFromIntError

pub fn try_from(value: u32) -> Result<usize, <usize as TryFrom<u32>>::Error>

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<NonZeroI64> for NonZeroU16

Attempts to convert NonZeroI64 to NonZeroU16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI64
) -> Result<NonZeroU16, <NonZeroU16 as TryFrom<NonZeroI64>>::Error>

impl TryFrom<NonZeroU32> for NonZeroIsize

Attempts to convert NonZeroU32 to NonZeroIsize.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU32
) -> Result<NonZeroIsize, <NonZeroIsize as TryFrom<NonZeroU32>>::Error>

impl TryFrom<i32> for u8

type Error = TryFromIntError

pub fn try_from(u: i32) -> Result<u8, <u8 as TryFrom<i32>>::Error>

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<NonZeroI128> for NonZeroU128

Attempts to convert NonZeroI128 to NonZeroU128.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI128
) -> Result<NonZeroU128, <NonZeroU128 as TryFrom<NonZeroI128>>::Error>

impl TryFrom<NonZeroIsize> for NonZeroI128

Attempts to convert NonZeroIsize to NonZeroI128.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroIsize
) -> Result<NonZeroI128, <NonZeroI128 as TryFrom<NonZeroIsize>>::Error>

impl TryFrom<NonZeroU64> for NonZeroI64

Attempts to convert NonZeroU64 to NonZeroI64.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU64
) -> Result<NonZeroI64, <NonZeroI64 as TryFrom<NonZeroU64>>::Error>

impl TryFrom<NonZeroI128> for NonZeroI16

Attempts to convert NonZeroI128 to NonZeroI16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI128
) -> Result<NonZeroI16, <NonZeroI16 as TryFrom<NonZeroI128>>::Error>

impl TryFrom<u128> for i16

type Error = TryFromIntError

pub fn try_from(u: u128) -> Result<i16, <i16 as TryFrom<u128>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: i128) -> Result<i64, <i64 as TryFrom<i128>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: u128) -> Result<i8, <i8 as TryFrom<u128>>::Error>

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 usize

type Error = TryFromIntError

pub fn try_from(u: i16) -> Result<usize, <usize as TryFrom<i16>>::Error>

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

Attempts to convert u64 to NonZeroU64.

type Error = TryFromIntError

pub fn try_from(
    value: u64
) -> Result<NonZeroU64, <NonZeroU64 as TryFrom<u64>>::Error>

impl TryFrom<NonZeroI128> for NonZeroU16

Attempts to convert NonZeroI128 to NonZeroU16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI128
) -> Result<NonZeroU16, <NonZeroU16 as TryFrom<NonZeroI128>>::Error>

impl TryFrom<NonZeroI64> for NonZeroI32

Attempts to convert NonZeroI64 to NonZeroI32.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI64
) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<NonZeroI64>>::Error>

impl TryFrom<NonZeroU64> for NonZeroI32

Attempts to convert NonZeroU64 to NonZeroI32.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU64
) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<NonZeroU64>>::Error>

impl TryFrom<isize> for i128

type Error = TryFromIntError

pub fn try_from(value: isize) -> Result<i128, <i128 as TryFrom<isize>>::Error>

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<NonZeroU128> for NonZeroU16

Attempts to convert NonZeroU128 to NonZeroU16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU128
) -> Result<NonZeroU16, <NonZeroU16 as TryFrom<NonZeroU128>>::Error>

impl TryFrom<i8> for NonZeroI8

Attempts to convert i8 to NonZeroI8.

type Error = TryFromIntError

pub fn try_from(
    value: i8
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<i8>>::Error>

impl TryFrom<u32> for u8

type Error = TryFromIntError

pub fn try_from(u: u32) -> Result<u8, <u8 as TryFrom<u32>>::Error>

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<NonZeroI128> for NonZeroI8

Attempts to convert NonZeroI128 to NonZeroI8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI128
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroI128>>::Error>

impl TryFrom<i16> for u64

type Error = TryFromIntError

pub fn try_from(u: i16) -> Result<u64, <u64 as TryFrom<i16>>::Error>

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<NonZeroI8> for NonZeroUsize

Attempts to convert NonZeroI8 to NonZeroUsize.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI8
) -> Result<NonZeroUsize, <NonZeroUsize as TryFrom<NonZeroI8>>::Error>

impl TryFrom<i128> for i8

type Error = TryFromIntError

pub fn try_from(u: i128) -> Result<i8, <i8 as TryFrom<i128>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: i64) -> Result<u16, <u16 as TryFrom<i64>>::Error>

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

type Error = TryFromIntError

pub fn try_from(value: usize) -> Result<u64, <u64 as TryFrom<usize>>::Error>

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<NonZeroI128> for NonZeroI32

Attempts to convert NonZeroI128 to NonZeroI32.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI128
) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<NonZeroI128>>::Error>

impl TryFrom<usize> for NonZeroUsize

Attempts to convert usize to NonZeroUsize.

type Error = TryFromIntError

pub fn try_from(
    value: usize
) -> Result<NonZeroUsize, <NonZeroUsize as TryFrom<usize>>::Error>

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

type Error = TryFromSliceError

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

impl TryFrom<isize> for NonZeroIsize

Attempts to convert isize to NonZeroIsize.

type Error = TryFromIntError

pub fn try_from(
    value: isize
) -> Result<NonZeroIsize, <NonZeroIsize as TryFrom<isize>>::Error>

impl TryFrom<i128> for isize

type Error = TryFromIntError

pub fn try_from(u: i128) -> Result<isize, <isize as TryFrom<i128>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: usize) -> Result<i8, <i8 as TryFrom<usize>>::Error>

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<NonZeroUsize> for NonZeroI16

Attempts to convert NonZeroUsize to NonZeroI16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroUsize
) -> Result<NonZeroI16, <NonZeroI16 as TryFrom<NonZeroUsize>>::Error>

impl TryFrom<i64> for u8

type Error = TryFromIntError

pub fn try_from(u: i64) -> Result<u8, <u8 as TryFrom<i64>>::Error>

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<NonZeroI64> for NonZeroIsize

Attempts to convert NonZeroI64 to NonZeroIsize.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI64
) -> Result<NonZeroIsize, <NonZeroIsize as TryFrom<NonZeroI64>>::Error>

impl TryFrom<i64> for u128

type Error = TryFromIntError

pub fn try_from(u: i64) -> Result<u128, <u128 as TryFrom<i64>>::Error>

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<NonZeroI128> for NonZeroU8

Attempts to convert NonZeroI128 to NonZeroU8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI128
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI128>>::Error>

impl TryFrom<NonZeroI32> for NonZeroU16

Attempts to convert NonZeroI32 to NonZeroU16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI32
) -> Result<NonZeroU16, <NonZeroU16 as TryFrom<NonZeroI32>>::Error>

impl TryFrom<i8> for u8

type Error = TryFromIntError

pub fn try_from(u: i8) -> Result<u8, <u8 as TryFrom<i8>>::Error>

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<NonZeroI64> for NonZeroI8

Attempts to convert NonZeroI64 to NonZeroI8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI64
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroI64>>::Error>

impl TryFrom<NonZeroU16> for NonZeroU8

Attempts to convert NonZeroU16 to NonZeroU8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU16
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroU16>>::Error>

impl TryFrom<usize> for u8

type Error = TryFromIntError

pub fn try_from(u: usize) -> Result<u8, <u8 as TryFrom<usize>>::Error>

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<NonZeroU128> for NonZeroI8

Attempts to convert NonZeroU128 to NonZeroI8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU128
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroU128>>::Error>

impl TryFrom<NonZeroU64> for NonZeroIsize

Attempts to convert NonZeroU64 to NonZeroIsize.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU64
) -> Result<NonZeroIsize, <NonZeroIsize as TryFrom<NonZeroU64>>::Error>

impl TryFrom<i32> for NonZeroI32

Attempts to convert i32 to NonZeroI32.

type Error = TryFromIntError

pub fn try_from(
    value: i32
) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<i32>>::Error>

impl TryFrom<i8> for u64

type Error = TryFromIntError

pub fn try_from(u: i8) -> Result<u64, <u64 as TryFrom<i8>>::Error>

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<NonZeroI32> for NonZeroU32

Attempts to convert NonZeroI32 to NonZeroU32.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI32
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroI32>>::Error>

impl TryFrom<NonZeroIsize> for NonZeroU128

Attempts to convert NonZeroIsize to NonZeroU128.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroIsize
) -> Result<NonZeroU128, <NonZeroU128 as TryFrom<NonZeroIsize>>::Error>

impl TryFrom<NonZeroU32> for NonZeroI8

Attempts to convert NonZeroU32 to NonZeroI8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU32
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroU32>>::Error>

impl TryFrom<NonZeroU16> for NonZeroI16

Attempts to convert NonZeroU16 to NonZeroI16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU16
) -> Result<NonZeroI16, <NonZeroI16 as TryFrom<NonZeroU16>>::Error>

impl TryFrom<NonZeroU128> for NonZeroI32

Attempts to convert NonZeroU128 to NonZeroI32.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU128
) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<NonZeroU128>>::Error>

impl TryFrom<NonZeroU16> for NonZeroIsize

Attempts to convert NonZeroU16 to NonZeroIsize.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU16
) -> Result<NonZeroIsize, <NonZeroIsize as TryFrom<NonZeroU16>>::Error>

impl TryFrom<usize> for i128

type Error = TryFromIntError

pub fn try_from(value: usize) -> Result<i128, <i128 as TryFrom<usize>>::Error>

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<NonZeroU16> for NonZeroI8

Attempts to convert NonZeroU16 to NonZeroI8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU16
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroU16>>::Error>

impl TryFrom<i16> for u32

type Error = TryFromIntError

pub fn try_from(u: i16) -> Result<u32, <u32 as TryFrom<i16>>::Error>

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<NonZeroI128> for NonZeroIsize

Attempts to convert NonZeroI128 to NonZeroIsize.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI128
) -> Result<NonZeroIsize, <NonZeroIsize as TryFrom<NonZeroI128>>::Error>

impl TryFrom<u32> for isize

type Error = TryFromIntError

pub fn try_from(value: u32) -> Result<isize, <isize as TryFrom<u32>>::Error>

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<NonZeroI16> for NonZeroU32

Attempts to convert NonZeroI16 to NonZeroU32.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI16
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroI16>>::Error>

impl TryFrom<u128> for i128

type Error = TryFromIntError

pub fn try_from(u: u128) -> Result<i128, <i128 as TryFrom<u128>>::Error>

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

type Error = TryFromIntError

pub fn try_from(value: u64) -> Result<usize, <usize as TryFrom<u64>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: i128) -> Result<u128, <u128 as TryFrom<i128>>::Error>

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 isize

type Error = TryFromIntError

pub fn try_from(value: u16) -> Result<isize, <isize as TryFrom<u16>>::Error>

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<NonZeroI32> for NonZeroU64

Attempts to convert NonZeroI32 to NonZeroU64.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI32
) -> Result<NonZeroU64, <NonZeroU64 as TryFrom<NonZeroI32>>::Error>

impl TryFrom<NonZeroUsize> for NonZeroU64

Attempts to convert NonZeroUsize to NonZeroU64.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroUsize
) -> Result<NonZeroU64, <NonZeroU64 as TryFrom<NonZeroUsize>>::Error>

impl TryFrom<NonZeroUsize> for NonZeroI64

Attempts to convert NonZeroUsize to NonZeroI64.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroUsize
) -> Result<NonZeroI64, <NonZeroI64 as TryFrom<NonZeroUsize>>::Error>

impl TryFrom<i128> for i16

type Error = TryFromIntError

pub fn try_from(u: i128) -> Result<i16, <i16 as TryFrom<i128>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: u64) -> Result<i8, <i8 as TryFrom<u64>>::Error>

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<NonZeroU128> for NonZeroUsize

Attempts to convert NonZeroU128 to NonZeroUsize.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU128
) -> Result<NonZeroUsize, <NonZeroUsize as TryFrom<NonZeroU128>>::Error>

impl TryFrom<usize> for u128

type Error = TryFromIntError

pub fn try_from(value: usize) -> Result<u128, <u128 as TryFrom<usize>>::Error>

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

type Error = CharTryFromError

pub fn try_from(i: u32) -> Result<char, <char as TryFrom<u32>>::Error>

impl TryFrom<NonZeroI16> for NonZeroU64

Attempts to convert NonZeroI16 to NonZeroU64.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI16
) -> Result<NonZeroU64, <NonZeroU64 as TryFrom<NonZeroI16>>::Error>

impl TryFrom<u8> for i8

type Error = TryFromIntError

pub fn try_from(u: u8) -> Result<i8, <i8 as TryFrom<u8>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: u64) -> Result<u32, <u32 as TryFrom<u64>>::Error>

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<NonZeroIsize> for NonZeroUsize

Attempts to convert NonZeroIsize to NonZeroUsize.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroIsize
) -> Result<NonZeroUsize, <NonZeroUsize as TryFrom<NonZeroIsize>>::Error>

impl TryFrom<u128> for u16

type Error = TryFromIntError

pub fn try_from(u: u128) -> Result<u16, <u16 as TryFrom<u128>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: i32) -> Result<usize, <usize as TryFrom<i32>>::Error>

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<NonZeroUsize> for NonZeroI128

Attempts to convert NonZeroUsize to NonZeroI128.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroUsize
) -> Result<NonZeroI128, <NonZeroI128 as TryFrom<NonZeroUsize>>::Error>

impl TryFrom<i64> for i8

type Error = TryFromIntError

pub fn try_from(u: i64) -> Result<i8, <i8 as TryFrom<i64>>::Error>

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<NonZeroI8> for NonZeroU8

Attempts to convert NonZeroI8 to NonZeroU8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI8
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI8>>::Error>

impl TryFrom<i128> for u32

type Error = TryFromIntError

pub fn try_from(u: i128) -> Result<u32, <u32 as TryFrom<i128>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: i16) -> Result<i8, <i8 as TryFrom<i16>>::Error>

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<NonZeroI64> for NonZeroU32

Attempts to convert NonZeroI64 to NonZeroU32.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI64
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroI64>>::Error>

impl TryFrom<NonZeroUsize> for NonZeroIsize

Attempts to convert NonZeroUsize to NonZeroIsize.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroUsize
) -> Result<NonZeroIsize, <NonZeroIsize as TryFrom<NonZeroUsize>>::Error>

impl TryFrom<i32> for i16

type Error = TryFromIntError

pub fn try_from(u: i32) -> Result<i16, <i16 as TryFrom<i32>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: u128) -> Result<u32, <u32 as TryFrom<u128>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: usize) -> Result<u16, <u16 as TryFrom<usize>>::Error>

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<NonZeroU64> for NonZeroI8

Attempts to convert NonZeroU64 to NonZeroI8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU64
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroU64>>::Error>

impl TryFrom<NonZeroI16> for NonZeroI8

Attempts to convert NonZeroI16 to NonZeroI8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI16
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroI16>>::Error>

impl TryFrom<NonZeroI128> for NonZeroI64

Attempts to convert NonZeroI128 to NonZeroI64.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI128
) -> Result<NonZeroI64, <NonZeroI64 as TryFrom<NonZeroI128>>::Error>

impl TryFrom<u128> for u64

type Error = TryFromIntError

pub fn try_from(u: u128) -> Result<u64, <u64 as TryFrom<u128>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: i128) -> Result<u8, <u8 as TryFrom<i128>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: u64) -> Result<u16, <u16 as TryFrom<u64>>::Error>

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<NonZeroI64> for NonZeroU8

Attempts to convert NonZeroI64 to NonZeroU8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI64
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI64>>::Error>

impl TryFrom<i8> for u32

type Error = TryFromIntError

pub fn try_from(u: i8) -> Result<u32, <u32 as TryFrom<i8>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: i32) -> Result<u64, <u64 as TryFrom<i32>>::Error>

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<NonZeroI64> for NonZeroU128

Attempts to convert NonZeroI64 to NonZeroU128.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI64
) -> Result<NonZeroU128, <NonZeroU128 as TryFrom<NonZeroI64>>::Error>

impl TryFrom<NonZeroIsize> for NonZeroU32

Attempts to convert NonZeroIsize to NonZeroU32.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroIsize
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroIsize>>::Error>

impl TryFrom<NonZeroI8> for NonZeroU128

Attempts to convert NonZeroI8 to NonZeroU128.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI8
) -> Result<NonZeroU128, <NonZeroU128 as TryFrom<NonZeroI8>>::Error>

impl TryFrom<NonZeroI32> for NonZeroI16

Attempts to convert NonZeroI32 to NonZeroI16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI32
) -> Result<NonZeroI16, <NonZeroI16 as TryFrom<NonZeroI32>>::Error>

impl TryFrom<NonZeroU64> for NonZeroI16

Attempts to convert NonZeroU64 to NonZeroI16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU64
) -> Result<NonZeroI16, <NonZeroI16 as TryFrom<NonZeroU64>>::Error>

impl TryFrom<isize> for u128

type Error = TryFromIntError

pub fn try_from(u: isize) -> Result<u128, <u128 as TryFrom<isize>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: usize) -> Result<i64, <i64 as TryFrom<usize>>::Error>

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<NonZeroU128> for NonZeroI128

Attempts to convert NonZeroU128 to NonZeroI128.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU128
) -> Result<NonZeroI128, <NonZeroI128 as TryFrom<NonZeroU128>>::Error>

impl TryFrom<NonZeroI8> for NonZeroU16

Attempts to convert NonZeroI8 to NonZeroU16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI8
) -> Result<NonZeroU16, <NonZeroU16 as TryFrom<NonZeroI8>>::Error>

impl TryFrom<i64> for i32

type Error = TryFromIntError

pub fn try_from(u: i64) -> Result<i32, <i32 as TryFrom<i64>>::Error>

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<NonZeroI16> for NonZeroU128

Attempts to convert NonZeroI16 to NonZeroU128.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI16
) -> Result<NonZeroU128, <NonZeroU128 as TryFrom<NonZeroI16>>::Error>

impl TryFrom<NonZeroIsize> for NonZeroU8

Attempts to convert NonZeroIsize to NonZeroU8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroIsize
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroIsize>>::Error>

impl TryFrom<i128> for u64

type Error = TryFromIntError

pub fn try_from(u: i128) -> Result<u64, <u64 as TryFrom<i128>>::Error>

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<'a, T, const N: usize> TryFrom<&'a mut [T]> for &'a mut [T; N]

type Error = TryFromSliceError

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

impl TryFrom<i32> for u32

type Error = TryFromIntError

pub fn try_from(u: i32) -> Result<u32, <u32 as TryFrom<i32>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: usize) -> Result<i16, <i16 as TryFrom<usize>>::Error>

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

Attempts to convert i128 to NonZeroI128.

type Error = TryFromIntError

pub fn try_from(
    value: i128
) -> Result<NonZeroI128, <NonZeroI128 as TryFrom<i128>>::Error>

impl TryFrom<u32> for u16

type Error = TryFromIntError

pub fn try_from(u: u32) -> Result<u16, <u16 as TryFrom<u32>>::Error>

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<NonZeroU64> for NonZeroUsize

Attempts to convert NonZeroU64 to NonZeroUsize.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU64
) -> Result<NonZeroUsize, <NonZeroUsize as TryFrom<NonZeroU64>>::Error>

impl TryFrom<NonZeroI16> for NonZeroU8

Attempts to convert NonZeroI16 to NonZeroU8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI16
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI16>>::Error>

impl<'a, T, const N: usize> TryFrom<&'a [T]> for &'a [T; N]

type Error = TryFromSliceError

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

impl TryFrom<u128> for i64

type Error = TryFromIntError

pub fn try_from(u: u128) -> Result<i64, <i64 as TryFrom<u128>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: u32) -> Result<i16, <i16 as TryFrom<u32>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: u64) -> Result<i32, <i32 as TryFrom<u64>>::Error>

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<NonZeroU64> for NonZeroU8

Attempts to convert NonZeroU64 to NonZeroU8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU64
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroU64>>::Error>

impl TryFrom<NonZeroI64> for NonZeroU64

Attempts to convert NonZeroI64 to NonZeroU64.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI64
) -> Result<NonZeroU64, <NonZeroU64 as TryFrom<NonZeroI64>>::Error>

impl TryFrom<i16> for u16

type Error = TryFromIntError

pub fn try_from(u: i16) -> Result<u16, <u16 as TryFrom<i16>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: i64) -> Result<u64, <u64 as TryFrom<i64>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: u64) -> Result<i16, <i16 as TryFrom<u64>>::Error>

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<NonZeroU32> for NonZeroU8

Attempts to convert NonZeroU32 to NonZeroU8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU32
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroU32>>::Error>

impl TryFrom<i32> for u128

type Error = TryFromIntError

pub fn try_from(u: i32) -> Result<u128, <u128 as TryFrom<i32>>::Error>

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

Attempts to convert i16 to NonZeroI16.

type Error = TryFromIntError

pub fn try_from(
    value: i16
) -> Result<NonZeroI16, <NonZeroI16 as TryFrom<i16>>::Error>

impl TryFrom<u8> for NonZeroU8

Attempts to convert u8 to NonZeroU8.

type Error = TryFromIntError

pub fn try_from(
    value: u8
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<u8>>::Error>

impl TryFrom<NonZeroIsize> for NonZeroI8

Attempts to convert NonZeroIsize to NonZeroI8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroIsize
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroIsize>>::Error>

impl TryFrom<i8> for u16

type Error = TryFromIntError

pub fn try_from(u: i8) -> Result<u16, <u16 as TryFrom<i8>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: i128) -> Result<u16, <u16 as TryFrom<i128>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: i64) -> Result<u32, <u32 as TryFrom<i64>>::Error>

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<NonZeroUsize> for NonZeroU128

Attempts to convert NonZeroUsize to NonZeroU128.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroUsize
) -> Result<NonZeroU128, <NonZeroU128 as TryFrom<NonZeroUsize>>::Error>

impl TryFrom<u128> for isize

type Error = TryFromIntError

pub fn try_from(u: u128) -> Result<isize, <isize as TryFrom<u128>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: isize) -> Result<usize, <usize as TryFrom<isize>>::Error>

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 isize

type Error = TryFromIntError

pub fn try_from(value: i32) -> Result<isize, <isize as TryFrom<i32>>::Error>

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<NonZeroI32> for NonZeroIsize

Attempts to convert NonZeroI32 to NonZeroIsize.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI32
) -> Result<NonZeroIsize, <NonZeroIsize as TryFrom<NonZeroI32>>::Error>

impl TryFrom<NonZeroU64> for NonZeroU16

Attempts to convert NonZeroU64 to NonZeroU16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU64
) -> Result<NonZeroU16, <NonZeroU16 as TryFrom<NonZeroU64>>::Error>

impl TryFrom<u128> for i32

type Error = TryFromIntError

pub fn try_from(u: u128) -> Result<i32, <i32 as TryFrom<u128>>::Error>

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<NonZeroU128> for NonZeroU8

Attempts to convert NonZeroU128 to NonZeroU8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU128
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroU128>>::Error>

impl TryFrom<isize> for i64

type Error = TryFromIntError

pub fn try_from(value: isize) -> Result<i64, <i64 as TryFrom<isize>>::Error>

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<NonZeroI128> for NonZeroUsize

Attempts to convert NonZeroI128 to NonZeroUsize.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI128
) -> Result<NonZeroUsize, <NonZeroUsize as TryFrom<NonZeroI128>>::Error>

impl TryFrom<NonZeroU128> for NonZeroI16

Attempts to convert NonZeroU128 to NonZeroI16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU128
) -> Result<NonZeroI16, <NonZeroI16 as TryFrom<NonZeroU128>>::Error>

impl TryFrom<NonZeroUsize> for NonZeroU32

Attempts to convert NonZeroUsize to NonZeroU32.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroUsize
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroUsize>>::Error>

impl TryFrom<NonZeroI8> for NonZeroU64

Attempts to convert NonZeroI8 to NonZeroU64.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI8
) -> Result<NonZeroU64, <NonZeroU64 as TryFrom<NonZeroI8>>::Error>

impl TryFrom<u64> for isize

type Error = TryFromIntError

pub fn try_from(u: u64) -> Result<isize, <isize as TryFrom<u64>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: isize) -> Result<u16, <u16 as TryFrom<isize>>::Error>

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<NonZeroIsize> for NonZeroU16

Attempts to convert NonZeroIsize to NonZeroU16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroIsize
) -> Result<NonZeroU16, <NonZeroU16 as TryFrom<NonZeroIsize>>::Error>

impl TryFrom<NonZeroU128> for NonZeroU64

Attempts to convert NonZeroU128 to NonZeroU64.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU128
) -> Result<NonZeroU64, <NonZeroU64 as TryFrom<NonZeroU128>>::Error>

impl TryFrom<NonZeroU8> for NonZeroI8

Attempts to convert NonZeroU8 to NonZeroI8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU8
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroU8>>::Error>

impl TryFrom<i64> for usize

type Error = TryFromIntError

pub fn try_from(u: i64) -> Result<usize, <usize as TryFrom<i64>>::Error>

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<NonZeroU64> for NonZeroU32

Attempts to convert NonZeroU64 to NonZeroU32.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU64
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroU64>>::Error>

impl TryFrom<NonZeroIsize> for NonZeroU64

Attempts to convert NonZeroIsize to NonZeroU64.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroIsize
) -> Result<NonZeroU64, <NonZeroU64 as TryFrom<NonZeroIsize>>::Error>

impl TryFrom<NonZeroU32> for NonZeroI16

Attempts to convert NonZeroU32 to NonZeroI16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU32
) -> Result<NonZeroI16, <NonZeroI16 as TryFrom<NonZeroU32>>::Error>

impl TryFrom<NonZeroI128> for NonZeroU32

Attempts to convert NonZeroI128 to NonZeroU32.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI128
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroI128>>::Error>

impl TryFrom<u32> for NonZeroU32

Attempts to convert u32 to NonZeroU32.

type Error = TryFromIntError

pub fn try_from(
    value: u32
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<u32>>::Error>

impl TryFrom<i16> for u8

type Error = TryFromIntError

pub fn try_from(u: i16) -> Result<u8, <u8 as TryFrom<i16>>::Error>

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<NonZeroIsize> for NonZeroI32

Attempts to convert NonZeroIsize to NonZeroI32.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroIsize
) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<NonZeroIsize>>::Error>

impl TryFrom<NonZeroI64> for NonZeroI16

Attempts to convert NonZeroI64 to NonZeroI16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI64
) -> Result<NonZeroI16, <NonZeroI16 as TryFrom<NonZeroI64>>::Error>

impl TryFrom<i32> for i8

type Error = TryFromIntError

pub fn try_from(u: i32) -> Result<i8, <i8 as TryFrom<i32>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: i8) -> Result<u128, <u128 as TryFrom<i8>>::Error>

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

Attempts to convert u128 to NonZeroU128.

type Error = TryFromIntError

pub fn try_from(
    value: u128
) -> Result<NonZeroU128, <NonZeroU128 as TryFrom<u128>>::Error>

impl TryFrom<NonZeroU32> for NonZeroUsize

Attempts to convert NonZeroU32 to NonZeroUsize.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU32
) -> Result<NonZeroUsize, <NonZeroUsize as TryFrom<NonZeroU32>>::Error>

impl TryFrom<i64> for NonZeroI64

Attempts to convert i64 to NonZeroI64.

type Error = TryFromIntError

pub fn try_from(
    value: i64
) -> Result<NonZeroI64, <NonZeroI64 as TryFrom<i64>>::Error>

impl TryFrom<NonZeroI32> for NonZeroU8

Attempts to convert NonZeroI32 to NonZeroU8.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI32
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI32>>::Error>

impl TryFrom<isize> for i32

type Error = TryFromIntError

pub fn try_from(u: isize) -> Result<i32, <i32 as TryFrom<isize>>::Error>

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<NonZeroI32> for NonZeroU128

Attempts to convert NonZeroI32 to NonZeroU128.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI32
) -> Result<NonZeroU128, <NonZeroU128 as TryFrom<NonZeroI32>>::Error>

impl TryFrom<NonZeroU128> for NonZeroIsize

Attempts to convert NonZeroU128 to NonZeroIsize.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU128
) -> Result<NonZeroIsize, <NonZeroIsize as TryFrom<NonZeroU128>>::Error>

impl TryFrom<NonZeroU32> for NonZeroU16

Attempts to convert NonZeroU32 to NonZeroU16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroU32
) -> Result<NonZeroU16, <NonZeroU16 as TryFrom<NonZeroU32>>::Error>

impl TryFrom<u16> for NonZeroU16

Attempts to convert u16 to NonZeroU16.

type Error = TryFromIntError

pub fn try_from(
    value: u16
) -> Result<NonZeroU16, <NonZeroU16 as TryFrom<u16>>::Error>

impl TryFrom<i64> for isize

type Error = TryFromIntError

pub fn try_from(value: i64) -> Result<isize, <isize as TryFrom<i64>>::Error>

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<NonZeroI8> for NonZeroU32

Attempts to convert NonZeroI8 to NonZeroU32.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI8
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroI8>>::Error>

impl TryFrom<usize> for isize

type Error = TryFromIntError

pub fn try_from(u: usize) -> Result<isize, <isize as TryFrom<usize>>::Error>

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 usize

type Error = TryFromIntError

pub fn try_from(u: u128) -> Result<usize, <usize as TryFrom<u128>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: i128) -> Result<usize, <usize as TryFrom<i128>>::Error>

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<NonZeroUsize> for NonZeroU16

Attempts to convert NonZeroUsize to NonZeroU16.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroUsize
) -> Result<NonZeroU16, <NonZeroU16 as TryFrom<NonZeroUsize>>::Error>

impl TryFrom<u64> for u8

type Error = TryFromIntError

pub fn try_from(u: u64) -> Result<u8, <u8 as TryFrom<u64>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: u32) -> Result<i32, <i32 as TryFrom<u32>>::Error>

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<NonZeroIsize> for NonZeroI64

Attempts to convert NonZeroIsize to NonZeroI64.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroIsize
) -> Result<NonZeroI64, <NonZeroI64 as TryFrom<NonZeroIsize>>::Error>

impl TryFrom<u128> for u8

type Error = TryFromIntError

pub fn try_from(u: u128) -> Result<u8, <u8 as TryFrom<u128>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: isize) -> Result<u8, <u8 as TryFrom<isize>>::Error>

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<NonZeroI128> for NonZeroU64

Attempts to convert NonZeroI128 to NonZeroU64.

type Error = TryFromIntError

pub fn try_from(
    value: NonZeroI128
) -> Result<NonZeroU64, <NonZeroU64 as TryFrom<NonZeroI128>>::Error>

impl TryFrom<u16> for i8

type Error = TryFromIntError

pub fn try_from(u: u16) -> Result<i8, <i8 as TryFrom<u16>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: i64) -> Result<i16, <i16 as TryFrom<i64>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: usize) -> Result<i32, <i32 as TryFrom<usize>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: u64) -> Result<i64, <i64 as TryFrom<u64>>::Error>

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

type Error = TryFromIntError

pub fn try_from(u: isize) -> Result<u32, <u32 as TryFrom<isize>>::Error>

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<T, const N: usize> TryFrom<Arc<[T]>> for Arc<[T; N]>

type Error = Arc<[T]>

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

impl<T, const N: usize> TryFrom<Rc<[T]>> for Rc<[T; N]>

type Error = Rc<[T]>

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

impl<T, A, const N: usize> TryFrom<Vec<T, A>> for [T; N] where
    A: Allocator, 

type Error = Vec<T, A>

pub fn try_from(vec: Vec<T, A>) -> Result<[T; N], Vec<T, A>>

Gets the entire contents of the Vec<T> as an array, if its size exactly matches that of the requested array.

Examples

use std::convert::TryInto;
assert_eq!(vec![1, 2, 3].try_into(), Ok([1, 2, 3]));
assert_eq!(<Vec<i32>>::new().try_into(), Ok([]));

If the length doesn’t match, the input comes back in Err:

use std::convert::TryInto;
let r: Result<[i32; 4], _> = (0..10).collect::<Vec<_>>().try_into();
assert_eq!(r, Err(vec![0, 1, 2, 3, 4, 5, 6, 7, 8, 9]));

If you’re fine with just getting a prefix of the Vec<T>, you can call .truncate(N) first.

use std::convert::TryInto;
let mut v = String::from("hello world").into_bytes();
v.sort();
v.truncate(2);
let [a, b]: [_; 2] = v.try_into().unwrap();
assert_eq!(a, b' ');
assert_eq!(b, b'd');

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Implementors

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 

type Error = Infallible

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, const N: usize> TryFrom<Box<[T], Global>> for Box<[T; N], Global>

type Error = Box<[T], Global>

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

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