Type Alias playdate_sys::ffi::LCDSpriteUpdateFunction

pub type LCDSpriteUpdateFunction = Option<unsafe extern "C" fn(sprite: *mut LCDSprite)>;

Aliased Type

enum LCDSpriteUpdateFunction {
    None,
    Some(unsafe extern "C" fn(_: *mut LCDSprite)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(_: *mut LCDSprite))

Some value of type T.

Trait Implementations

impl<R, A> OkOrNullFnErr<unsafe extern "C" fn(_: A) -> R> for Option<unsafe extern "C" fn(_: A) -> R>

type Error = NullPtrError

fn ok_or_null(self) -> Result<unsafe extern "C" fn(_: A) -> R, NullPtrError>

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size:4 bytes

Size for each variant:

• None: 0 bytes
• Some: 4 bytes