// FIXME: should be under pest::*
ascii_hex_digit = ascii_digit | "A" | "B" | "C" | "D" | "E" | "F"
ascii_digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"
ascii_nonzero_digit = "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"

whitespaces   =  _{ " " | "\t" | pest::newline }
int          =  ascii_nonzero_digit - ascii_digit+ | ascii_digit