pub(crate) fn is_join_control(c: char) -> bool {
    JOIN_CONTROL
        .binary_search_by(|&cpr| cpr.compare(c as u32))
        .is_ok()
}
/// Return whether c has the 'Join_Control' Unicode property.
Return whether c has the 'Join_Control' Unicode property.
Return whether c has the ' Join_Control ' Unicode property .
pub(crate) fn is_join_control(c: char) -> bool {
    JOIN_CONTROL
        .binary_search_by(|&cpr| cpr.compare(c as u32))
        .is_ok()
}
pub ( crate ) fn is_join_control ( c : char ) -> bool { JOIN_CONTROL . binary_search_by ( | & cpr | cpr . compare ( c as u32 ) ) . is_ok ( ) }
Return whether c has the 'Join_Control' Unicode property.
Return whether c has the ' Join_Control ' Unicode property .
c
char