# also includes quotes and format strings
STRING = !SPECIALS

NUMBER = 1-9
ALFA = a-zA-Z
EOL = \n
IDENT = ALFA (ALFA | NUMBER)*

VARIABLE = $IDENT
INDEX = VALUE ( "[" VALUE "]" ) +

PRIMITIVE_VALUES = NUMBER | STRING | VARIABLE | INDEX

# group and object destructors/bindings will be here
BINDABLE = PRIMITIVE_VALUES

VALUE = PRIMITIVE_VALUES | GROUP

GROUP = "(" COMMAND ")"

COMMAND = ( VALUE WHITESPACE ) +

LET = let BINDABLE = VALUE

FOR = for BINDABLE in VALUE { STATEMENTS }
IF = if VALUE { STATEMENTS } ( else if VALUE { STATEMENTS } ) * ( else { STATEMENTS } )?
WHILE = while VALUE { STATEMENTS } ( else { STATEMENTS } )?
LOOP = loop { STATEMENTS }

STATEMENT = COMMAND | LET | FOR | IF | WHILE | LOOP
STATEMENTS = ( STATEMENT (; | EOL) )* STATEMENT?