Macro stringsext::parse_integer

macro_rules! parse_integer {
    ($s : expr, $x_from_str_radix : expr, $x_from_str : expr) => { ... };
}

Parses a filter expression from some hexadecimal string or number string to an integer value.

$s is Option<String> to be parsed. $x_from_str_radix is either u128::from_str_radix or u64::from_str_radix. $x_from_stris e.g.u8::from_str or usize::from_str, …

The marco returns a filter integer value in Option<integer> and returns early when parsing is not successful.