Function take_unsigned_float_or_exceptions 

fn take_unsigned_float_or_exceptions<I, E: ParserError<I>>(
    input: &mut I,
) -> Result<(), E>
where
    I: StreamIsPartial + Stream + Compare<Caseless<&'static str>> + Compare<char> + AsBStr,
    <I as Stream>::Token: AsChar + Clone,
    <I as Stream>::IterOffsets: Clone,