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comparison Jint.Runtime/VM/Scope.cs @ 6:a6329b092499

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Added scopes, function builder
author cin
date Wed, 30 Oct 2013 17:38:35 +0400
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5:cb13da6e3349 6:a6329b092499
1 using System;
2 using System.Collections.Generic;
3
4 namespace Jint.Runtime.VM
5 {
6 class Scope
7 {
8 Frame m_frame;
9 Dictionary<string,int> m_vars;
10 Scope m_parent;
11
12 public const int ThisRegister = 0;
13 public const int ScopeRegister = 1;
14 public const int FirstVarRegsiter = 2;
15
16 public Scope (IDictionary<string,int> vars, Frame frame, Scope parent)
17 {
18 if (vars == null)
19 throw new ArgumentNullException ("vars");
20 if (frame == null)
21 throw new ArgumentNullException ("frame");
22
23 m_vars = new Dictionary<string, int> (vars);
24 m_frame = frame;
25 m_parent = parent;
26 }
27
28 public IReference Resolve(string name) {
29 if (String.IsNullOrEmpty (name))
30 throw new ArgumentException ("The specified variable name is invalid");
31
32 int index;
33 if (m_vars.TryGetValue (name, out index))
34 return new ScopeReference (this, index);
35
36 if (m_parent != null)
37 return m_parent.Resolve (name);
38 else
39 throw new KeyNotFoundException (String.Format("The specified variable '{0}' isn't found",name));
40 }
41 }
42 }
43