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comparison Implab/Automaton/RegularExpressions/RegularExpressionVisitorT.cs @ 178:d5c5db0335ee ref20160224

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working on JSON parser
author cin
date Wed, 23 Mar 2016 19:51:45 +0300
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177:a0ff6a0e9c44 178:d5c5db0335ee
1 using Implab;
2 using System;
3 using System.Collections.Generic;
4 using System.Diagnostics;
5 using System.Linq;
6
7 namespace Implab.Automaton.RegularExpressions {
8 /// <summary>
9 /// </summary>
10 public class RegularExpressionVisitor<TTag> : RegularExpressionVisitor {
11 readonly Dictionary<int, TTag> m_tags = new Dictionary<int, TTag>();
12
13 readonly ITaggedDFABuilder<TTag> m_builder;
14
15 public RegularExpressionVisitor(ITaggedDFABuilder<TTag> builder) : base(builder) {
16 m_builder = builder;
17 }
18
19 public override void Visit(EndToken token) {
20 base.Visit(token);
21 var tagged = token as EndToken<TTag>;
22 if (tagged != null)
23 m_tags.Add(Index, tagged.Tag);
24 }
25
26 protected override void MarkFinalState(HashSet<int> state) {
27 base.MarkFinalState(state);
28 m_builder.SetStateTag(Translate(state), GetStateTags(state));
29 }
30
31 TTag[] GetStateTags(IEnumerable<int> state) {
32 Debug.Assert(state != null);
33 return state.Where(m_tags.ContainsKey).Select(pos => m_tags[pos]).ToArray();
34 }
35
36 }
37 }