Type Alias dart_sys::Dart_EnvironmentCallback
source · pub type Dart_EnvironmentCallback = Option<unsafe extern "C" fn(name: Dart_Handle) -> Dart_Handle>;
Expand description
An environment lookup callback function.
\param name The name of the value to lookup in the environment.
\return A valid handle to a string if the name exists in the current environment or Dart_Null() if not.
Aliased Type§
enum Dart_EnvironmentCallback {
None,
Some(unsafe extern "C" fn(_: *mut _Dart_Handle) -> *mut _Dart_Handle),
}
Variants§
None
No value.
Some(unsafe extern "C" fn(_: *mut _Dart_Handle) -> *mut _Dart_Handle)
Some value of type T
.