%import common.ESCAPED_STRING   -> STRING
%import common.NUMBER
%import common.WS
%import common.LETTER
%import common.CNAME
%ignore WS

start: (statement_expr | function_expr)+
number_expr: (add_expr | sub_expr)

statement_expr: (number_expr | (assignment_expr | assignment_backwards_expr | assignment_any_expr))

EOL: "uwu"

assignment_subject_expr: (number_expr+) | STRING

identifier_expr: CNAME

type_expr: "COC" | "BHAL"

assignment_expr: "🍆💦" type_expr identifier_expr [("," identifier_expr)+] "=" assignment_subject_expr EOL
assignment_backwards_expr: assignment_subject_expr "=" "🍆💦" identifier_expr [("," identifier_expr)+] type_expr EOL

function_expr: "proc" identifier_expr "(" [(identifier_expr ",")+ identifier_expr] ")" "{" statement_expr+ "}"

assignment_any_expr: assignment_subject_expr "=" "🍆💦" type_expr identifier_expr [("," identifier_expr)+] "=" assignment_subject_expr EOL

sign_pos_expr: "+"
sign_neg_expr: "-"
sign_expr: (sign_neg_expr | sign_neg_expr)

add_expr: inner_expr [("+" (inner_expr | important_expr))+]
sub_expr: inner_expr [("-" (inner_expr | important_expr))+]

mul_expr: inner_expr ("*" inner_expr)+
div_expr: inner_expr ("/" inner_expr)+

important_expr: (mul_expr | div_expr)

inner_expr: [sign_expr] NUMBER | (number_expr)