STAT:
	WHILESTAT | IFSTAT | FOREACHSTAT | EXPSTAT | COMPOUNDSTAT 
	| 'return' [ EXPSTAT ] | VARDEC

EXPSTAT:
	EXPRESSION ';'

COMPOUNDSTAT:
	{ STATSEQ }

STATSEQ:
	STAT | STATSEQ STAT

EXPRESSION:
	EXPRESSION BINEXPOP EXPRESSION | PREFIXOP EXPRESSION | EXPRESSION POSTFIXOP 
	| '(' EXPRESSION ')' | IDENT | NUMBER | STRING | FUNCTION | ASSIGNEXP

WHILESTAT:
	'while' '(' EXPRESSION ')' STATEMENT

ASSIGNEXP:
	VAR BINSTATOP ( ASSIGNEXP | EXPRESSION )

IFSTAT:
	'if' '(' EXPRESSION ')' STATEMENT ['else' STATEMENT]

FOREACHSTAT:
	'foreach' IDENT 'in' VECTOR

BINEXPOP:
	'+' | '-' | '*' | '/' | '==' | '<' | '>' | '<=' | '>='

BINSTATOP:
	'=' | '*=' | '+=' | '-=' | '/='

PREFIXOP:
	'++' | '--' | '-'

POSTFIXOP:
	'++' | '--' | '[' NUMBER ']'

FUNCTION:
	IDENT '(' FUNCARGLIST ')'

FUNCDEF:
	'procedure' IDENT '(' [ FUNCARGLIST ] ')' '{' [STATEMENT] '}'

FUNCARGLIST:
	IDENT [',' FUNCARGLIST]

VARDEC:
	('local' | 'global') IDENT [ '=' EXPRESSION ]

VAR:
	IDENT [ '[' EXPRESSION ']' ]

STRING:
	'"'<stringLiteral>'"'

NUMBER:
	<numLiteral>

IDENT:
	<stringLiteral starting with character or _ >