capable }
escapable = _{
    "b" | "f" | "n" | "r" | "t" | "/" | "\\" | ("u" ~ hexchar)
}

member_name_shorthand = { name_first ~ name_char* }
name_first = { ALPHA | "_" | '\u{0080}'..'\u{D7FF}' | '\u{E000}'..'\u{10FFFF}' }
name_char = { name_first | DIGIT }
not_op = {"!"}
curr = _{"@"}
ESC = _{ "\\" }
unescaped = _{
    '\u{0020}'..'\u{0021}' |
    '\u{0023}'..'\u{0026}' |
    '\u{0028}'..'\u{005B}' |
    '\u{005D}'..'\u{D7FF}' |
    '\u{E000}'..'\u{10FFFF}'
}

S = _{ WHITESPACE* }
hexchar = _{ non_surrogate | (high_surrogate ~ "\\" ~ "u" ~ low_surrogate) }
number = { (int | "-0") ~ frac? ~ exp? }
frac = { "." ~ DIGIT+ }
exp = { ("e" | "E") ~ ("-" | "+")? ~ DIGIT+ }
non_surrogate = _{ (DIGIT | "A" | "B" | "C" | "E" | "F") ~ HEXDIG{3} | ("D" ~ ('0'..'7') ~ HEXDIG{2}) }

high_surrogate = _{ "D" ~ ("8" | "9" | "A" | "B") ~ HEXDIG{2} }

low_surrogate = _{ "D" ~ ("C" | "D" | "E" | "F") ~ HEXDIG{2} }

HEXDIG = _{ DIGIT | "A" | "B" | "C" | "D" | "E" | "F" }
DIGIT = _{ ASCII_DIGIT }
DIGIT1 = _{ ASCII_NONZERO_DIGIT}
ALPHA = { ASCII_ALPHA }
WHITESPACE = _{ " " | "\t" | "\r\n" | "\n" | "\r"}

// Matches any number less than 9007199254740991 early escape for any number <= 999999999999999
safe_int = _{
    (
     DIGIT1 ~ DIGIT{0,14} ~ !ASCII_DIGIT // 1 to 15 digits (well below the max)
    | '1'..'8' ~ ASCII_DIGIT{15}
    | "900"  ~ '0'..'6' ~ ASCII_DIGIT{12}
    | "90070"             ~ ASCII_DIGIT{11}
    | "90071"  ~ '0'..'8' ~ ASCII_DIGIT{10}
    | "900719"  ~ '0'..'8' ~ ASCII_DIGIT{9}
    | "9007199"  ~ '0'..'1' ~ ASCII_DIGIT{8}
    | "90071992"  ~ '0'..'4' ~ ASCII_DIGIT{7}
    | "900719925"  ~ '0'..'3' ~ ASCII_DIGIT{6}
    | "9007199254"  ~ '0'..'6' ~ ASCII_DIGIT{5}
    | "90071992547"  ~ '0'..'3' ~ ASCII_DIGIT{4}
    | "9007199254740"  ~ '0'..'8' ~ ASCII_DIGIT{2}
    | "90071992547409"  ~ '0'..'8' ~ ASCII_DIGIT
    | "900719925474099"  ~ '0'..'1'
    ) ~ !ASCII_DIGIT
}