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Last change
on this file since 13847 was
12391,
checked in by gkronber, 10 years ago
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#2283: added shuffling of terminal symbols to the royal pair problem to make sure that there is no bias from order of terminal symbols.
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File size:
964 bytes
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| 1 | using System;
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| 2 | using System.Collections.Generic;
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| 3 |
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| 4 | namespace HeuristicLab.Problems.GrammaticalOptimization {
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| 5 |
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| 6 | // symbols are characters, possible nonterminal symbols are : 'A'..'Z'
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| 7 | // phrases and sentences are strings
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| 8 | // each symbol is only on element in a string
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| 9 |
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| 10 | public interface IGrammar {
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| 11 | char SentenceSymbol { get; }
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| 12 | IEnumerable<char> NonTerminalSymbols { get; }
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| 13 | IEnumerable<char> TerminalSymbols { get; }
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| 14 | IEnumerable<char> Symbols { get; }
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| 15 |
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| 16 | IEnumerable<Sequence> GetAlternatives(char nt);
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| 17 | IEnumerable<Sequence> GetTerminalAlternatives(char nt);
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| 18 | IEnumerable<Sequence> GetNonTerminalAlternatives(char nt);
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| 19 |
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| 20 | int MinPhraseLength(Sequence phrase);
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| 21 | int MaxPhraseLength(Sequence phrase);
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| 22 | Sequence CompleteSentenceRandomly(System.Random random, Sequence phrase, int maxLen);
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| 23 |
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| 24 | bool IsTerminal(char symbol);
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| 25 | bool IsTerminal(string phrase);
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| 26 | bool IsNonTerminal(char symbol);
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| 27 | }
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| 28 | }
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