grammar.cfg

S -> STATEMENTS

STATEMENTS -> S_if
            | S_assign
            | S_alias_assign
			      | S_for
			      | EXPRESSIONS
			
EXPRESSIONS -> E_arithmetic
			       | E_compare
			       | E_alert

S_assign -> E_address _ R_is _ EXPRESSIONS

S_alias_assign -> E_alias _ R_is _ E_address

S_if -> S_if1
      | S_if2

S_if1 -> "혹시 " _ EXPRESSIONS _ ("니?"|"이니?"|"야?") _ "그럼" NL S_if1 NL "아니면" NL S_if1
       | (STATEMENTS NL):+ "해줘"

S_if2 -> "혹시 " _ EXPRESSIONS _ ("니?"|"이니?"|"야?") _ "그럼" NL S_if
       | "혹시 " _ EXPRESSIONS _ ("니?"|"이니?"|"야?") _ "그럼" NL S_if1 NL "아니면" NL S_if2


S_for -> EXPRESSIONS _ "일 때 까지" NL (STATEMENTS NL):+ "해줘"

E_address -> "[" E_address_ "]"
E_address_ -> [가-힣]:+

E_alias -> "{" E_alias_ "}"
E_alias_ -> [가-힣]:+

E_value -> E_address

E_alias_value -> E_alias

E_valuable -> E_value
            | E_alias_value
			      | E_number
		      	| E_string 

E_arithmetic -> E_arithmetic _ "더하기" _ E_arithmetic2
             |  E_arithmetic _ "빼기" _ E_arithmetic2
             | E_arithmetic2
E_arithmetic2 -> E_arithmetic2 _ "곱하기" _ E_arithmetic_terminal
               | E_arithmetic2 _ "나누기" _ E_arithmetic_terminal
               | E_arithmetic_terminal
E_arithmetic_terminal -> E_valuable

E_compare -> EXPRESSIONS _ R_iis _ EXPRESSIONS _ "보다 크다"
		       | EXPRESSIONS _ R_iis _ EXPRESSIONS _ "보다 작다"
		       | EXPRESSIONS _ R_iis _ EXPRESSIONS _ "보다 크거나 같다"
	    	   | EXPRESSIONS _ R_iis _ EXPRESSIONS _ "보다 작거나 같다"
           | EXPRESSIONS _ R_iis _ EXPRESSIONS _ ("와"|"과") " 같다"
		
E_alert -> "뿅" _ [!]:+ _ "(" _ E_alert_ _ ")"
E_alert_ -> E_alert_ _ "," _ EXPRESSIONS
		      | EXPRESSIONS

E_number -> [0-9]:+

E_string -> "'" E_string_ "'"
E_string_ -> [가-힣|\s|0-9|!?\.,\[\]\*\+-/]:+

R_is -> "는"
      | "은"
	  
R_iis -> "가"
       | "이"
	     | "이가"


_ -> [\s]:*
NL -> [\s|\r\n]:*