Simple options

• Category: Lists, Tuples and Options
• Description: Create some optional values, print them and match on them.
• Code:

using Nemerle;
using Nemerle.Collections;
using System;
using System.Console;

def data = Some(1, 3);
WriteLine($"data = $data");
WriteLine($"data.IsSome = $(data.IsSome)"); 
WriteLine($"data.IsNone = $(data.IsNone)");
WriteLine($"data.Value = $(data.Value.ToString())"); 

def data2 = None();
WriteLine($"data2.IsSome = $(data2.IsSome)"); 
WriteLine($"data2.IsNone = $(data2.IsNone)")

• Execution Result:

data = Some ((1, 3))
data.IsSome = True
data.IsNone = False
data.Value = (1, 3)
data2.IsSome = False
data2.IsNone = True

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