Add code

ScriptConverter/Ast/Declarations/Declaration.cs

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+using System;
+using ScriptConverter.Parser;
+
+namespace ScriptConverter.Ast.Declarations
+{
+    abstract class Declaration
+    {
+        public readonly ScriptToken Start;
+        public readonly ScriptToken End;
+
+        protected Declaration(ScriptToken start, ScriptToken end = null)
+        {
+            if (start == null)
+                throw new ArgumentNullException("start");
+
+            Start = start;
+            End = end ?? start;
+        }
+
+        public abstract TDecl Accept<TDoc, TDecl, TStmt, TExpr>(IAstVisitor<TDoc, TDecl, TStmt, TExpr> visitor);
+
+        public abstract void SetParent();
+    }
+}

ScriptConverter/Ast/Declarations/FieldDeclaration.cs

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+using ScriptConverter.Ast.Expressions;
+using ScriptConverter.Parser;
+
+namespace ScriptConverter.Ast.Declarations
+{
+    class FieldDeclaration : Declaration
+    {
+        public ScriptType Type { get; private set; }
+        public string Name { get; private set; }
+        public Expression Value { get; private set; }
+        public bool IsConstant { get; private set; }
+        public bool IsPublic { get; private set; }
+
+        public FieldDeclaration(ScriptToken start, ScriptToken end, ScriptType type, string name, Expression value, bool isConst, bool isPublic)
+            : base(start, end)
+        {
+            Type = type;
+            Name = name;
+            Value = value;
+            IsConstant = isConst;
+            IsPublic = isPublic;
+        }
+
+        public override TDecl Accept<TDoc, TDecl, TStmt, TExpr>(IAstVisitor<TDoc, TDecl, TStmt, TExpr> visitor)
+        {
+            return visitor.Visit(this);
+        }
+
+        public override void SetParent()
+        {
+            Value.SetParent(null);
+        }
+    }
+}

ScriptConverter/Ast/Declarations/IncludeDeclaration.cs

@@ -0,0 +1,25 @@
+using ScriptConverter.Parser;
+
+namespace ScriptConverter.Ast.Declarations
+{
+    class IncludeDeclaration : Declaration
+    {
+        public string Name { get; private set; }
+
+        public IncludeDeclaration(ScriptToken start, ScriptToken end, string name)
+            : base(start, end)
+        {
+            Name = name;
+        }
+
+        public override TDecl Accept<TDoc, TDecl, TStmt, TExpr>(IAstVisitor<TDoc, TDecl, TStmt, TExpr> visitor)
+        {
+            return visitor.Visit(this);
+        }
+
+        public override void SetParent()
+        {
+
+        }
+    }
+}

ScriptConverter/Ast/Declarations/InheritsDeclaration.cs

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+using ScriptConverter.Parser;
+
+namespace ScriptConverter.Ast.Declarations
+{
+    class InheritsDeclaration : Declaration
+    {
+        public string Name { get; private set; }
+
+        public InheritsDeclaration(ScriptToken start, ScriptToken end, string name)
+            : base(start, end)
+        {
+            Name = name;
+        }
+
+        public override TDecl Accept<TDoc, TDecl, TStmt, TExpr>(IAstVisitor<TDoc, TDecl, TStmt, TExpr> visitor)
+        {
+            return visitor.Visit(this);
+        }
+
+        public override void SetParent()
+        {
+
+        }
+    }
+}

ScriptConverter/Ast/Declarations/MethodDeclaration.cs

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+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using ScriptConverter.Ast.Statements;
+using ScriptConverter.Parser;
+
+namespace ScriptConverter.Ast.Declarations
+{
+    class MethodDeclaration : Declaration
+    {
+        public class Parameter
+        {
+            public ScriptType Type { get; private set; }
+            public string Name { get; private set; }
+
+            public Parameter(ScriptType type, string name)
+            {
+                Type = type;
+                Name = name;
+            }
+        }
+
+        public ScriptType ReturnType { get; private set; }
+        public string Name { get; private set; }
+        public ReadOnlyCollection<Parameter> Parameters { get; private set; }
+        public BlockStatement Block { get; private set; }
+
+        public MethodDeclaration(ScriptToken start, ScriptToken end, ScriptType returnType, string name, List<Parameter> parameters, BlockStatement block)
+            : base(start, end)
+        {
+            ReturnType = returnType;
+            Name = name;
+            Parameters = parameters.AsReadOnly();
+            Block = block;
+        }
+
+        public override TDecl Accept<TDoc, TDecl, TStmt, TExpr>(IAstVisitor<TDoc, TDecl, TStmt, TExpr> visitor)
+        {
+            return visitor.Visit(this);
+        }
+
+        public override void SetParent()
+        {
+            Block.SetParent(null);
+        }
+    }
+}