Trait ParamMaybeMut

pub trait ParamMaybeMut<T> {
    // Required method
    fn param_maybe_mut(&mut self) -> Option<&mut T>;
}

Item of type T may have been set in a certain_map slot and returns Option<&mut T>.

When used as a trait bound, ParamMaybeMut<T> ensures that the constrained type implements the param_maybe_mut method, which returns an Option<&mut T>. This allows the caller to attempt to retrieve a mutable reference to the value of type T from the implementing type, if it has been previously set in a certain_map slot using ParamSet<T>.

By using the ParamMaybeMut<T> trait bound, you can handle cases where the value may or may not have been set in the certain_map.

Example

fn process_param_maybe_mut<P: ParamMaybeMut<T>, T>(param_provider: &mut P) {
    if let Some(value_mut) = param_provider.param_maybe_mut() {
        // Modify the value of type T
    }
}

Required Methods

fn param_maybe_mut(&mut self) -> Option<&mut T>

Implementors