Struct dync::ValueRef

pub struct ValueRef<'a, V: ?Sized> where
    V: HasDrop,  { /* fields omitted */ }

A generic value reference into a buffer.

Implementations

impl<'a, V: HasDrop> ValueRef<'a, V>

pub fn new<T: Any + DropBytes>(typed: &'a T) -> ValueRef<'a, V> where
    V: VTable<T>, 

Create a new ValueRef from a typed reference.

impl<'a, V: ?Sized + HasDrop> ValueRef<'a, V>

pub fn size(&self) -> usize

Get the size of the value pointed-to by this reference.

pub fn value_type_id(&self) -> TypeId

Get the TypeId of the referenced value.

pub fn is<T: 'static>(&self) -> bool

Returns true if this referenced value's type is the same as T.

pub fn clone_value(&self) -> Value<Box<[MaybeUninit<u8>]>, V> where
    V: HasClone + Clone, 

Clone the referenced value.

Unlike the Clone trait, this function will produce an owned clone of the value pointed to by this value reference.

pub fn clone_small_value(&self) -> Value<MaybeUninit<usize>, V> where
    V: HasClone + Clone, 

Clone the referenced value.

Unlike the Clone trait, this function will produce an owned clone of the value pointed to by this value reference.

This version of clone_value tries to fit the underlying value into a usize sized value, and panics if that fails.

pub fn downcast<T: 'static>(self) -> Option<&'a T>

Downcast this value reference into a borrowed T type. Return None if the downcast fails.

pub fn upcast<U: ?Sized + HasDrop + From<V>>(self) -> ValueRef<'a, U> where
    V: Clone, 

pub fn upcast_ref<U: ?Sized + HasDrop + From<V>>(&self) -> ValueRef<U> where
    V: Clone, 

pub fn reborrow(&self) -> ValueRef<V>

An alternative to Clone that doesn't require cloning the vtable.

Trait Implementations

impl<'a, V: Clone + ?Sized> Clone for ValueRef<'a, V> where
    V: HasDrop, 

fn clone(&self) -> ValueRef<'a, V>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a, V: ?Sized + HasDebug + HasDrop> Debug for ValueRef<'a, V>

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<'a, V: ?Sized + HasEq + HasDrop> Eq for ValueRef<'a, V>

impl<'a, B: GetBytesMut, V: ?Sized> From<&'a Value<B, V>> for ValueRef<'a, V> where
    B: GetBytesRef,
    V: Clone + HasDrop, 

fn from(val: &'a Value<B, V>) -> Self

Performs the conversion.

impl<'a, V: Any + Clone> From<CopyValueRef<'a, V>> for ValueRef<'a, (DropFn, V)>

fn from(v: CopyValueRef<'a, V>) -> ValueRef<'a, (DropFn, V)>

Performs the conversion.

impl<'a, V: HasDrop> From<ValueMut<'a, V>> for ValueRef<'a, V>

fn from(v: ValueMut<'a, V>) -> ValueRef<'a, V>

Performs the conversion.

impl<'a, V: HasDrop> From<ValueRef<'a, V>> for Meta<VTableRef<'a, V>>

fn from(val: ValueRef<'a, V>) -> Meta<VTableRef<'a, V>>

Performs the conversion.

impl<'a, V: ?Sized + HasHash + HasDrop> Hash for ValueRef<'a, V>

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl<'a, V: ?Sized + HasPartialEq + HasDrop> PartialEq<ValueRef<'a, V>> for ValueRef<'a, V>

fn eq(&self, other: &Self) -> bool

This method tests for self and other values to be equal, and is used by ==.

#[must_use]fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl<'a, V: ?Sized + HasDrop + HasSend> Send for ValueRef<'a, V>

impl<'a, V: ?Sized + HasDrop + HasSync> Sync for ValueRef<'a, V>