Mark mapping closures @noescape

Author: JaSpa

Box/Box.swift

@@ -20,7 +20,7 @@ public final class Box<T>: BoxType, Printable {
 	public let value: T
 
 	/// Constructs a new Box by transforming `value` by `f`.
-	public func map<U>(f: T -> U) -> Box<U> {
+	public func map<U>(@noescape f: T -> U) -> Box<U> {
 		return Box<U>(f(value))
 	}
 

Box/BoxType.swift

@@ -41,6 +41,6 @@ public func != <B: BoxType where B.Value: Equatable> (lhs: B, rhs: B) -> Bool {
 // MARK: Map
 
 /// Maps the value of a box into a new box.
-public func map<B: BoxType, C: BoxType>(v: B, f: B.Value -> C.Value) -> C {
+public func map<B: BoxType, C: BoxType>(v: B, @noescape f: B.Value -> C.Value) -> C {
 	return C(f(v.value))
 }

Box/MutableBox.swift

@@ -15,7 +15,7 @@ public final class MutableBox<T>: MutableBoxType, Printable {
 	public var value: T
 
 	/// Constructs a new MutableBox by transforming `value` by `f`.
-	public func map<U>(f: T -> U) -> MutableBox<U> {
+	public func map<U>(@noescape f: T -> U) -> MutableBox<U> {
 		return MutableBox<U>(f(value))
 	}