TreeFromStringLexer.h

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#pragma once
 
#include <ext/istream>
 
#include <alib/string>
 
#include <common/lexer.hpp>
 
namespace tree {
 
class TreeFromStringLexer : public ext::Lexer < TreeFromStringLexer > {
public:
    enum class TokenType {
        RANKED_TREE,
        RANKED_PATTERN,
        RANKED_EXTENDED_PATTERN,
        RANKED_NONLINEAR_PATTERN,
        UNRANKED_TREE,
        UNRANKED_PATTERN,
        UNRANKED_EXTENDED_PATTERN,
        UNRANKED_NONLINEAR_PATTERN,
        BAR, RANK, SUBTREE_WILDCARD, NODE_WILDCARD, SUBTREE_GAP, NONLINEAR_VARIABLE, TEOF, ERROR
    };
 
    static Token next ( ext::istream & input );
};
 
} /* namespace tree */