Struct c_bridge::Opaque

#[repr(C)]
pub struct Opaque {
    pub dealloc: unsafe extern "C" fn(_: *mut Self),
    pub type_hint: unsafe extern "C" fn(_: *const Self) -> *const c_char,
    pub object: *mut c_void,
}

A FFI-compatible wrapper for opaque types

Fields

dealloc: unsafe extern "C" fn(_: *mut Self)

The deallocator

type_hint: unsafe extern "C" fn(_: *const Self) -> *const c_char

A pointer to a type hint (which is a NULL-terminated string)

object: *mut c_void

The underlying object (implementation dependent)

Methods

impl Opaque

pub fn type_hint(&self) -> *const c_char

The type hint of the opaque object

pub fn as_rust_box(&self) -> Option<&Box<dyn Any + 'static>>

A reference to a Box<dyn Any + 'static> if the opaque object contains such a box

pub fn as_rust_box_mut(&mut self) -> Option<&mut Box<dyn Any + 'static>>

A mutable reference to a Box<dyn Any + 'static> if the opaque object contains such a box

Trait Implementations

impl Drop for Opaque

fn drop(&mut self)

Executes the destructor for this type.

impl From<Box<dyn Any + 'static>> for Opaque

fn from(boxed: Box<dyn Any + 'static>) -> Self

Performs the conversion.