Add code

ScriptConverter/Parser/Parselets/Declarations/MethodParselet.cs

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+using System.Linq;
+using ScriptConverter.Ast;
+using ScriptConverter.Ast.Declarations;
+
+namespace ScriptConverter.Parser.Parselets.Declarations
+{
+    class MethodParselet : IDeclarationParselet
+    {
+        public Declaration Parse(ScriptParser parser, ScriptToken token)
+        {
+            var returnType = parser.ParseType(token);
+            var name = parser.Take(ScriptTokenType.Identifier).Contents;
+
+            if (parser.MatchAndTake(ScriptTokenType.Assign))
+            {
+                var value = parser.ParseExpression();
+                parser.Take(ScriptTokenType.Semicolon);
+
+                return new FieldDeclaration(token, parser.Previous, returnType, name, value, false, false);
+            }
+
+            parser.Take(ScriptTokenType.LeftParen);
+
+            var parameters = parser.ParseSeparatedBy(ScriptTokenType.Comma, (_, first) =>
+            {
+                if (parser.Match(ScriptTokenType.RightParen))
+                    return null;
+
+                ScriptType paramType;
+                string paramName;
+                parser.ParseNamedType(out paramType, out paramName);
+
+                return new MethodDeclaration.Parameter(paramType, paramName);
+            }).ToList();
+
+            parser.Take(ScriptTokenType.RightParen);
+
+            var block = parser.ParseBlock(false);
+
+            return new MethodDeclaration(token, parser.Previous, returnType, name, parameters, block);
+        }
+    }
+}