Type Alias playdate_sys::ffi::PDButtonCallbackFunction

pub type PDButtonCallbackFunction = Option<unsafe extern "C" fn(button: PDButtons, down: c_int, when: u32, userdata: *mut c_void) -> c_int>;

Aliased Type

enum PDButtonCallbackFunction {
    None,
    Some(unsafe extern "C" fn(_: PDButtons, _: i32, _: u32, _: *mut c_void) -> i32),
}

Variants

None

No value.

Some(unsafe extern "C" fn(_: PDButtons, _: i32, _: u32, _: *mut c_void) -> i32)

Some value of type T.

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