C# (CSharp) Monoid.Identity示例

示例#1

 public static T When <T>(this Monoid <T> monoid, bool c, T then) =>
 c ? then : monoid.Identity();

示例#2

 public static T Appends <T>(this Monoid <T> monoid, IEnumerable <T> x) =>
 x.Aggregate(monoid.Identity(), monoid.BinaryOperation);