...

compiler/Compiler/Tokenizer.cs

@@ -165,6 +165,11 @@ public sealed class Tokenizer(string contents)
                 Consume();
                 return new TokenSymbol(line, startColumn, column - startColumn, Symbol.Comma);
             }
+            case '.':
+            {
+                Consume();
+                return new TokenSymbol(line, startColumn, column - startColumn, Symbol.Period);
+            }
             case ':':
             {
                 Consume();
@@ -322,6 +327,7 @@ public sealed class Tokenizer(string contents)
                     return value switch
                     {
                         "func" => new TokenKeyword(line, startColumn, column - startColumn, Keyword.Func),
+                        "struct" => new TokenKeyword(line, startColumn, column - startColumn, Keyword.Struct),
                         "let" => new TokenKeyword(line, startColumn, column - startColumn, Keyword.Let),
                         "if" => new TokenKeyword(line, startColumn, column - startColumn, Keyword.If),
                         "else" => new TokenKeyword(line, startColumn, column - startColumn, Keyword.Else),
@@ -415,6 +421,7 @@ public enum Symbol
     OpenParen,
     CloseParen,
     Comma,
+    Period,
     Colon,
     Caret,
     Bang,
@@ -451,6 +458,7 @@ public sealed class TokenSymbol(int line, int column, int length, Symbol symbol)
 public enum Keyword
 {
     Func,
+    Struct,
     Let,
     If,
     Else,