Enum OptionCallback 

#[repr(C, u8)]
pub enum OptionCallback {
    None,
    Some(Callback),
}

FFI-safe Option type for C interop.

This enum provides an ABI-stable alternative to Option<Callback> that can be safely passed across FFI boundaries.

Variants

None

No callback is present.

Some(Callback)

A callback is present.

Implementations

impl OptionCallback

pub fn into_option(self) -> Option<Callback>

Converts this FFI-safe option into a standard Rust Option<Callback>.

pub fn is_some(&self) -> bool

Returns true if a callback is present.

pub fn is_none(&self) -> bool

Returns true if no callback is present.

Trait Implementations

impl Clone for OptionCallback

fn clone(&self) -> OptionCallback

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OptionCallback

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

Formats the value using the given formatter.

impl From<Option<Callback>> for OptionCallback

fn from(o: Option<Callback>) -> Self

Converts to this type from the input type.

impl From<OptionCallback> for Option<Callback>

fn from(o: OptionCallback) -> Self

Converts to this type from the input type.

impl Hash for OptionCallback

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for OptionCallback

fn cmp(&self, other: &OptionCallback) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for OptionCallback

fn eq(&self, other: &OptionCallback) -> 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 PartialOrd for OptionCallback

fn partial_cmp(&self, other: &OptionCallback) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for OptionCallback

impl StructuralPartialEq for OptionCallback