heartleth / Lan

Readable alternative of EBNF

LAN 표기법

PART NaturalNumber
    # :n | explaination of nth parameter (zero-based)
    # comment
    
    # production rule
    RULE number     *numeric ?$NaturalNumber
    
    # *category : category's vocabulary in dictionary file
    # $NonTerminalSymbol
    # ?*category, ?$Sym : can be omitted
    # [:n=foo]*category, [:n=foo]$Sym : only activated when nth parameter is same with 'foo'. 
    # $Symbol( param1 param2 ) : nonterminal symbol with parameters, whitespace separated, default "0"
    
    # if, unless statement
    IF :parameter value
        RULE ... ......
    END
    IF :parameter ~ match_value1 match_value2 match_value3
        RULE ... ......
    END
    UNLESS :parameter value
        RULE ... ......
    END
    
    # grammer alias
    SET zerozero 0-terminal_symbol_zero 0-terminal_symbol_zero
    
    RULE hundred    1-one %zerozero
END

GNE에 따로 구현되어 있는 코드가 더 잘 작동합니다.