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162
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1 using System;
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2
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3 namespace Implab.Automaton.RegularExpressions {
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4 public class CatToken<TTag> : BinaryToken<TTag> {
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5 public CatToken(Token<TTag> left, Token<TTag> right)
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6 : base(left, right) {
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7 }
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8
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9 public override void Accept(IVisitor<TTag> visitor) {
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10 Safe.ArgumentNotNull(visitor, "visitor");
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11 visitor.Visit(this);
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12 }
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13
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14 public override string ToString() {
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15 return String.Format("{0}{1}", FormatToken(Left), FormatToken(Right));
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16 }
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17
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18 static string FormatToken(Token<TTag> token) {
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19 return String.Format(token is AltToken<TTag> ? "({0})" : "{0}", token);
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20 }
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21 }
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22 }
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