additional bool extensions

Signed-off-by: Jason Volk <jason@zemos.net>

src/core/utils/bool.rs

@@ -2,12 +2,49 @@
 
 /// Boolean extensions and chain.starters
 pub trait BoolExt {
+	fn map<T, F: FnOnce(Self) -> T>(self, f: F) -> T
+	where
+		Self: Sized;
+
+	fn map_ok_or<T, E, F: FnOnce() -> T>(self, err: E, f: F) -> Result<T, E>;
+
+	fn map_or<T, F: FnOnce() -> T>(self, err: T, f: F) -> T;
+
+	fn map_or_else<T, F: FnOnce() -> T>(self, err: F, f: F) -> T;
+
+	fn ok_or<E>(self, err: E) -> Result<(), E>;
+
+	fn ok_or_else<E, F: FnOnce() -> E>(self, err: F) -> Result<(), E>;
+
 	fn or<T, F: FnOnce() -> T>(self, f: F) -> Option<T>;
 
 	fn or_some<T>(self, t: T) -> Option<T>;
 }
 
 impl BoolExt for bool {
+	#[inline]
+	fn map<T, F: FnOnce(Self) -> T>(self, f: F) -> T
+	where
+		Self: Sized,
+	{
+		f(self)
+	}
+
+	#[inline]
+	fn map_ok_or<T, E, F: FnOnce() -> T>(self, err: E, f: F) -> Result<T, E> { self.ok_or(err).map(|()| f()) }
+
+	#[inline]
+	fn map_or<T, F: FnOnce() -> T>(self, err: T, f: F) -> T { self.then(f).unwrap_or(err) }
+
+	#[inline]
+	fn map_or_else<T, F: FnOnce() -> T>(self, err: F, f: F) -> T { self.then(f).unwrap_or_else(err) }
+
+	#[inline]
+	fn ok_or<E>(self, err: E) -> Result<(), E> { self.then_some(()).ok_or(err) }
+
+	#[inline]
+	fn ok_or_else<E, F: FnOnce() -> E>(self, err: F) -> Result<(), E> { self.then_some(()).ok_or_else(err) }
+
 	#[inline]
 	fn or<T, F: FnOnce() -> T>(self, f: F) -> Option<T> { (!self).then(f) }