}
pub fn parse_flags(s: &str, i: uint, lim: uint) ->
Parsed<~[Flag]> {
- let noflags: ~[Flag] = ~[];
- if i >= lim { return Parsed::new(move noflags, i); }
-
- fn more(f: Flag, s: &str, i: uint, lim: uint) ->
- Parsed<~[Flag]> {
- let next = parse_flags(s, i + 1u, lim);
- let rest = copy next.val;
- let j = next.next;
- let curr: ~[Flag] = ~[f];
- return Parsed::new(vec::append(move curr, rest), j);
+ let mut i = i;
+ let mut flags = ~[];
+
+ while i < lim {
+ let f = match s[i] {
+ '-' as u8 => FlagLeftJustify,
+ '0' as u8 => FlagLeftZeroPad,
+ ' ' as u8 => FlagSpaceForSign,
+ '+' as u8 => FlagSignAlways,
+ '#' as u8 => FlagAlternate,
+ _ => break
+ };
+
+ flags.push(f);
+ i += 1;
}
- // Unfortunate, but because s is borrowed, can't use a closure
- // fn more(f: Flag, s: &str) { more_(f, s, i, lim); }
- let f = s[i];
- return if f == '-' as u8 {
- more(FlagLeftJustify, s, i, lim)
- } else if f == '0' as u8 {
- more(FlagLeftZeroPad, s, i, lim)
- } else if f == ' ' as u8 {
- more(FlagSpaceForSign, s, i, lim)
- } else if f == '+' as u8 {
- more(FlagSignAlways, s, i, lim)
- } else if f == '#' as u8 {
- more(FlagAlternate, s, i, lim)
- } else { Parsed::new(move noflags, i) };
+
+ Parsed::new(flags, i)
}
pub fn parse_count(s: &str, i: uint, lim: uint)
-> Parsed<Count> {