Struct CFBinaryHeapCallBacks 

#[repr(C)]
pub struct CFBinaryHeapCallBacks {
    pub version: CFIndex,
    pub retain: Option<unsafe extern "C-unwind" fn(*const CFAllocator, *const c_void) -> *const c_void>,
    pub release: Option<unsafe extern "C-unwind" fn(*const CFAllocator, *const c_void)>,
    pub copyDescription: Option<unsafe extern "C-unwind" fn(*const c_void) -> *const CFString>,
    pub compare: Option<unsafe extern "C-unwind" fn(*const c_void, *const c_void, *mut c_void) -> CFComparisonResult>,
}

Available on crate feature CFBinaryHeap only.

Structure containing the callbacks for values of a CFBinaryHeap. Field: version The version number of the structure type being passed in as a parameter to the CFBinaryHeap creation functions. This structure is version 0. Field: retain The callback used to add a retain for the binary heap on values as they are put into the binary heap. This callback returns the value to use as the value in the binary heap, which is usually the value parameter passed to this callback, but may be a different value if a different value should be added to the binary heap. The binary heap’s allocator is passed as the first argument. Field: release The callback used to remove a retain previously added for the binary heap from values as they are removed from the binary heap. The binary heap’s allocator is passed as the first argument. Field: copyDescription The callback used to create a descriptive string representation of each value in the binary heap. This is used by the CFCopyDescription() function. Field: compare The callback used to compare values in the binary heap for equality in some operations.

See also Apple’s documentation

Fields

version: CFIndex

retain: Option<unsafe extern "C-unwind" fn(*const CFAllocator, *const c_void) -> *const c_void>

release: Option<unsafe extern "C-unwind" fn(*const CFAllocator, *const c_void)>

copyDescription: Option<unsafe extern "C-unwind" fn(*const c_void) -> *const CFString>

compare: Option<unsafe extern "C-unwind" fn(*const c_void, *const c_void, *mut c_void) -> CFComparisonResult>

Trait Implementations

impl Clone for CFBinaryHeapCallBacks

fn clone(&self) -> CFBinaryHeapCallBacks

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CFBinaryHeapCallBacks

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

Formats the value using the given formatter.

impl Encode for CFBinaryHeapCallBacks

Available on crate feature objc2 only.

const ENCODING: Encoding

The Objective-C type-encoding for this type.

impl PartialEq for CFBinaryHeapCallBacks

fn eq(&self, other: &CFBinaryHeapCallBacks) -> 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 RefEncode for CFBinaryHeapCallBacks

Available on crate feature objc2 only.

const ENCODING_REF: Encoding

The Objective-C type-encoding for a reference of this type.

impl Copy for CFBinaryHeapCallBacks

impl StructuralPartialEq for CFBinaryHeapCallBacks