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Добавлена метка v3.0.10 для набора изменений 74e048cbaac8
Добавлена метка v3.0.10 для набора изменений 74e048cbaac8

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r178:d5c5db0335ee ref20160224
r266:254d1f255d87 v3
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Token.cs
63 lines | 1.7 KiB | text/x-csharp | CSharpLexer
cin
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r162 using Implab;
using System;
using System.Linq;
namespace Implab.Automaton.RegularExpressions {
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r177 public abstract class Token {
public abstract void Accept(IVisitor visitor);
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r162
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working on JSON parser
r178 public Token End() {
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r177 return Cat(new EndToken());
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r162 }
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r177 public Token Tag<TTag>(TTag tag) {
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r162 return Cat(new EndToken<TTag>(tag));
}
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r177 public Token Cat(Token right) {
return new CatToken(this, right);
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r162 }
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r177 public Token Or(Token right) {
return new AltToken(this, right);
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r162 }
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r177 public Token Optional() {
return Or(new EmptyToken());
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r162 }
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r177 public Token EClosure() {
return new StarToken(this);
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r162 }
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r177 public Token Closure() {
return Cat(new StarToken(this));
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r162 }
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r177 public Token Repeat(int count) {
Token token = null;
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for (int i = 0; i < count; i++)
token = token != null ? token.Cat(this) : this;
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r177 return token ?? new EmptyToken();
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r162 }
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r177 public Token Repeat(int min, int max) {
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r162 if (min > max || min < 1)
throw new ArgumentOutOfRangeException();
var token = Repeat(min);
for (int i = min; i < max; i++)
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r165 token = token.Cat( Optional() );
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r162 return token;
}
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r177 public static Token New(params int[] set) {
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r162 Safe.ArgumentNotNull(set, "set");
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r177 Token token = null;
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r162 foreach(var c in set.Distinct())
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r177 token = token == null ? new SymbolToken(c) : token.Or(new SymbolToken(c));
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r162 return token;
}
}
}