RegularExpressionVisitorT.cs
37 lines
| 1.2 KiB
| text/x-csharp
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CSharpLexer
cin
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r178 | using Implab; | ||
| using System; | ||||
| using System.Collections.Generic; | ||||
| using System.Diagnostics; | ||||
| using System.Linq; | ||||
| namespace Implab.Automaton.RegularExpressions { | ||||
| /// <summary> | ||||
| /// </summary> | ||||
| public class RegularExpressionVisitor<TTag> : RegularExpressionVisitor { | ||||
| readonly Dictionary<int, TTag> m_tags = new Dictionary<int, TTag>(); | ||||
| readonly ITaggedDFABuilder<TTag> m_builder; | ||||
| public RegularExpressionVisitor(ITaggedDFABuilder<TTag> builder) : base(builder) { | ||||
| m_builder = builder; | ||||
| } | ||||
| public override void Visit(EndToken token) { | ||||
| base.Visit(token); | ||||
| var tagged = token as EndToken<TTag>; | ||||
| if (tagged != null) | ||||
| m_tags.Add(Index, tagged.Tag); | ||||
| } | ||||
| protected override void MarkFinalState(HashSet<int> state) { | ||||
| base.MarkFinalState(state); | ||||
| m_builder.SetStateTag(Translate(state), GetStateTags(state)); | ||||
| } | ||||
| TTag[] GetStateTags(IEnumerable<int> state) { | ||||
| Debug.Assert(state != null); | ||||
| return state.Where(m_tags.ContainsKey).Select(pos => m_tags[pos]).ToArray(); | ||||
| } | ||||
| } | ||||
| } | ||||