Trait mica::MutSelfFromRawValue

pub trait MutSelfFromRawValuewhere
    Self: Sized,{
    type Guard;

    unsafe fn mut_self_from_raw_value(
        value: &RawValue
    ) -> Result<(&mut Self, Self::Guard), Error>;
}

Implemented by all types that can be a &mut self parameter in an instance function.

Required Associated Types

type Guard

A scoped guard, ensuring safe access to Self.

Required Methods

unsafe fn mut_self_from_raw_value(
    value: &RawValue
) -> Result<(&mut Self, Self::Guard), Error>

Returns a mutable reference to Self without checking that the value is of the correct type.

This trait is only available for value types with interior mutability, as this function receives a shared, rather than mutable, reference.

Safety

This assumes the value is of the correct type. Calling this with a value whose type is not Self results in undefined behavior.

Because GATs aren’t stable yet, Self::Guard can keep a raw pointer to the value and as such must not outlive the value.

Implementations on Foreign Types

impl MutSelfFromRawValue for Vec<RawValue>

type Guard = ()

unsafe fn mut_self_from_raw_value(
    v: &RawValue
) -> Result<(&mut Self, Self::Guard), Error>

Implementors

impl<T> MutSelfFromRawValue for Twhere
    T: UserData,

type Guard = UnsafeMutGuard<T>