Struct CFTreeContext 

#[repr(C)]
pub struct CFTreeContext {
    pub version: CFIndex,
    pub info: *mut c_void,
    pub retain: CFTreeRetainCallBack,
    pub release: CFTreeReleaseCallBack,
    pub copyDescription: CFTreeCopyDescriptionCallBack,
}

Available on crate feature CFTree only.

Structure containing user-specified data and callbacks for a CFTree. Field: version The version number of the structure type being passed in as a parameter to the CFTree creation function. This structure is version 0. Field: info A C pointer to a user-specified block of data. Field: retain The callback used to add a retain for the info field. If this parameter is not a pointer to a function of the correct prototype, the behavior is undefined. The value may be NULL. Field: release The calllback used to remove a retain previously added for the info field. If this parameter is not a pointer to a function of the correct prototype, the behavior is undefined. The value may be NULL. Field: copyDescription The callback used to provide a description of the info field.

See also Apple’s documentation

Fields

version: CFIndex

info: *mut c_void

retain: CFTreeRetainCallBack

release: CFTreeReleaseCallBack

copyDescription: CFTreeCopyDescriptionCallBack

Trait Implementations

impl Clone for CFTreeContext

fn clone(&self) -> CFTreeContext

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CFTreeContext

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

Formats the value using the given formatter.

impl Encode for CFTreeContext

Available on crate feature objc2 only.

const ENCODING: Encoding

The Objective-C type-encoding for this type.

impl PartialEq for CFTreeContext

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

Available on crate feature objc2 only.

const ENCODING_REF: Encoding

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

impl Copy for CFTreeContext

impl StructuralPartialEq for CFTreeContext