##// END OF EJS Templates
Added the chaining method to the non-generic IPromise
Added the chaining method to the non-generic IPromise

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r55:c0bf853aa04f default
r96:daffa72a1cec v2
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Token.cs
67 lines | 2.0 KiB | text/x-csharp | CSharpLexer
cin
Added initial JSON support...
r55 using Implab;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Implab.Parsing {
public abstract class Token {
public abstract void Accept(IVisitor visitor);
public Token Extend() {
return new CatToken(this, new EndToken());
}
public Token Tag<T>(T tag) where T : IConvertible {
return new CatToken(this, new EndToken(tag.ToInt32(CultureInfo.InvariantCulture)));
}
public Token Cat(Token right) {
return new CatToken(this, right);
}
public Token Or(Token right) {
return new AltToken(this, right);
}
public Token Optional() {
return Or(new EmptyToken());
}
public Token EClosure() {
return new StarToken(this);
}
public Token Closure() {
return new CatToken(this, new StarToken(this));
}
public Token Repeat(int count) {
Token token = null;
for (int i = 0; i < count; i++)
token = token != null ? token.Cat(this) : this;
return token ?? new EmptyToken();
}
public Token Repeat(int min, int max) {
if (min > max || min < 1)
throw new ArgumentOutOfRangeException();
var token = Repeat(min);
for (int i = min; i < max; i++)
token = token.Cat( this.Optional() );
return token;
}
public static Token New<T>(params T[] set) where T : struct, IConvertible {
Safe.ArgumentNotNull(set, "set");
Token token = null;
foreach(var c in set.Distinct())
token = token == null ? new SymbolToken(c.ToInt32(CultureInfo.InvariantCulture)) : token.Or(new SymbolToken(c.ToInt32(CultureInfo.InvariantCulture)));
return token;
}
}
}