Trait conv::TryFrom [−] [src]

pub trait TryFrom<Src>: Sized {
    type Err: Error;
    fn try_from(src: Src) -> Result<Self, Self::Err>;
}

This trait is used to perform a conversion between different semantic types which might fail.

Where possible, prefer implementing this trait over TryInto, but prefer using TryInto for generic constraints.

Details

Typically, this should be used in cases where you are converting between values whose ranges and/or representations only partially overlap. That the conversion may fail should be a reasonably expected outcome. A standard example of this is converting from integers to enums of unitary variants.

Associated Types

`type Err: Error`

The error type produced by a failed conversion.

Required Methods

`fn try_from(src: Src) -> Result<Self, Self::Err>`

Convert the given value into the subject type.

Implementors

impl<Src> TryFrom<Src> for Src