#[derive(Default)]
pub struct OverrideOnce<T> {
once: Option<T>,
default: T,
}
impl<T> OverrideOnce<T> {
pub fn new(default: T) -> Self {
Self { once: None, default }
}
pub fn set(&mut self, default: T) {
self.default = default;
}
pub fn once(&mut self, once: T) {
self.once = Some(once);
}
pub fn once_with(&mut self, f: impl FnOnce() -> T) {
self.once = Some(f());
}
pub fn get(&self) -> &T {
self.once.as_ref().unwrap_or(&self.default)
}
}