Struct CFDictionaryValueCallBacks 

#[repr(C)]
pub struct CFDictionaryValueCallBacks {
    pub version: CFIndex,
    pub retain: CFDictionaryRetainCallBack,
    pub release: CFDictionaryReleaseCallBack,
    pub copyDescription: CFDictionaryCopyDescriptionCallBack,
    pub equal: CFDictionaryEqualCallBack,
}

Available on crate feature CFDictionary only.

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

See also Apple’s documentation

Fields

version: CFIndex

retain: CFDictionaryRetainCallBack

release: CFDictionaryReleaseCallBack

copyDescription: CFDictionaryCopyDescriptionCallBack

equal: CFDictionaryEqualCallBack

Trait Implementations

impl Clone for CFDictionaryValueCallBacks

fn clone(&self) -> CFDictionaryValueCallBacks

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CFDictionaryValueCallBacks

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

Formats the value using the given formatter.

impl Encode for CFDictionaryValueCallBacks

Available on crate feature objc2 only.

const ENCODING: Encoding

The Objective-C type-encoding for this type.

impl PartialEq for CFDictionaryValueCallBacks

fn eq(&self, other: &CFDictionaryValueCallBacks) -> 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 CFDictionaryValueCallBacks

Available on crate feature objc2 only.

const ENCODING_REF: Encoding

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

impl Copy for CFDictionaryValueCallBacks

impl StructuralPartialEq for CFDictionaryValueCallBacks