entry class Terminal {

}

atomic class Escapes {
    \r
    \n
    \p{L}
    \p{Letter}
    \p{Script=Latin}
    \p{Script_Extensions=Thaana}
}

atomic class Constants {
    | ASCII_HEX ~ ASCII_DEC
    | XID_START | XID_CONTINUE
    | EMOJI
}
atomic union Repeats {
    | ANY | ANY{1}                       // 1
    | ANY? | ANY{0, 1}                   // 0 ~ 1
    | ANY* | ANY{ } | ANY{, } | ANY{0, } // 0 ~ ∞
    | ANY+ | ANY{1, }                    // 1 ~ ∞
    | ANY{2}                             // 2
    | ANY{, 2} | ANY{0, 2}               // 0 ~ 2
    | ANY{2, }                           // 2 ~ ∞
}

atomic union Stacks {
    | PEEK(..=2)
    | PEEK(..<2)
    | PEEK(1..=2)
    | PEEK(...)
    | PUSH("  "+ | "\t"+)
    | PULL
    | DROP
}

inspector double {
    rust: crate::utils::is_double
}
external url {
    rust: url::Url::parse
    java: java.net.URL
}

macro paired(item, delimiter) {
    | '(' ')'
    | '(' item (delimiter item)* delimiter? ')'
}