Trait mica::SelfFromRawValue

pub trait SelfFromRawValue {
    type Guard;

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

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

This should never be implemented manually unless you know what you’re doing.

Required Associated Types

type Guard

A scoped guard, ensuring safe access to Self.

Required Methods

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

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

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 SelfFromRawValue for ()

() used as Self means that the method receiver is nil.

type Guard = ()

unsafe fn self_from_raw_value(
    _: &RawValue
) -> Result<(&Self, Self::Guard), Error>

impl SelfFromRawValue for bool

type Guard = ()

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

impl SelfFromRawValue for f64

type Guard = ()

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

impl SelfFromRawValue for String

type Guard = ()

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

impl SelfFromRawValue for Vec<RawValue>

type Guard = ()

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

Implementors

impl SelfFromRawValue for Dict

type Guard = ()

impl<T> SelfFromRawValue for Twhere
    T: UserData,

type Guard = UnsafeRefGuard<T>