Module system

compiler/NubLang/Tokenization/Token.cs

@@ -41,6 +41,7 @@ public enum Symbol
     Break,
     Continue,
     Colon,
+    DoubleColon,
     OpenParen,
     CloseParen,
     OpenBrace,

compiler/NubLang/Tokenization/Tokenizer.cs

@@ -35,6 +35,7 @@ public sealed class Tokenizer
         [['>', '>']] = Symbol.RightShift,
         [['&', '&']] = Symbol.And,
         [['|', '|']] = Symbol.Or,
+        [[':', ':']] = Symbol.DoubleColon,
         [[':']] = Symbol.Colon,
         [['(']] = Symbol.OpenParen,
         [[')']] = Symbol.CloseParen,