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make option::map_default<T,U> instead of U:copy

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Ben Blum 2012-07-31 13:21:15 -04:00
parent 09e893ba2e
commit e7d26a4917
1 changed files with 2 additions and 2 deletions
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4
src/libcore/option.rs
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@ -88,7 +88,7 @@ pure fn get_default<T: copy>(opt: option<T>, def: T) -> T {
alt opt { some(x) { x } none { def } }
}
pure fn map_default<T, U: copy>(opt: option<T>, def: U, f: fn(T) -> U) -> U {
pure fn map_default<T, U>(opt: option<T>, +def: U, f: fn(T) -> U) -> U {
//! Applies a function to the contained value or returns a default
alt opt { none { def } some(t) { f(t) } }
@ -133,7 +133,7 @@ impl extensions<T> for option<T> {
*/
pure fn chain<U>(f: fn(T) -> option<U>) -> option<U> { chain(self, f) }
/// Applies a function to the contained value or returns a default
pure fn map_default<U: copy>(def: U, f: fn(T) -> U) -> U
pure fn map_default<U>(+def: U, f: fn(T) -> U) -> U
{ map_default(self, def, f) }
/// Performs an operation on the contained value or does nothing
pure fn iter(f: fn(T)) { iter(self, f) }