Struct OptionVTable

#[non_exhaustive]
#[repr(C)]
pub struct OptionVTable {
    pub is_some_fn: for<'option> unsafe fn(PtrConst<'option>) -> bool,
    pub get_value_fn: for<'option> unsafe fn(PtrConst<'option>) -> Option<PtrConst<'option>>,
    pub init_some_fn: for<'option> unsafe fn(PtrUninit<'option>, PtrConst<'_>) -> PtrMut<'option>,
    pub init_none_fn: unsafe fn(PtrUninit<'_>) -> PtrMut<'_>,
    pub replace_with_fn: for<'option> unsafe fn(PtrMut<'option>, Option<PtrConst<'_>>),
}

Virtual table for Option<T>

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

is_some_fn: for<'option> unsafe fn(PtrConst<'option>) -> bool

cf. OptionIsSomeFn

get_value_fn: for<'option> unsafe fn(PtrConst<'option>) -> Option<PtrConst<'option>>

cf. OptionGetValueFn

init_some_fn: for<'option> unsafe fn(PtrUninit<'option>, PtrConst<'_>) -> PtrMut<'option>

cf. OptionInitSomeFn

init_none_fn: unsafe fn(PtrUninit<'_>) -> PtrMut<'_>

cf. OptionInitNoneFn

replace_with_fn: for<'option> unsafe fn(PtrMut<'option>, Option<PtrConst<'_>>)

cf. OptionReplaceWithFn

Implementations

impl OptionVTable

pub const fn builder() -> OptionVTableBuilder

Returns a builder for OptionVTable

Trait Implementations

impl Clone for OptionVTable

fn clone(&self) -> OptionVTable

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for OptionVTable

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Hash for OptionVTable

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

where __H: Hasher,

Feeds this value into the given Hasher.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for OptionVTable

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

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for OptionVTable

impl Eq for OptionVTable

impl StructuralPartialEq for OptionVTable