// This test had to do with an outdated version of the iterable iface. // However, the condition it was testing seemed complex enough to // warrant still having a test, so I inlined the old definitions. iface iterable { fn iter(blk: fn(A)); } impl of iterable for fn@(fn(A)) { fn iter(blk: fn(A)) { self(blk); } } impl of iterable for fn@(fn(uint)) { fn iter(blk: fn(&&uint)) { self( |i| blk(i) ) } } fn filter>(self: IA, prd: fn@(A) -> bool, blk: fn(A)) { do self.iter |a| { if prd(a) { blk(a) } } } fn foldl>(self: IA, +b0: B, blk: fn(B, A) -> B) -> B { let mut b <- b0; do self.iter |a| { b <- blk(b, a); } ret b; } fn range(lo: uint, hi: uint, it: fn(uint)) { let mut i = lo; while i < hi { it(i); i += 1u; } } fn main() { let range = |a| range(0u, 1000u, a); let filt = |a| filter( range, |&&n: uint| n % 3u != 0u && n % 5u != 0u, a); let sum = foldl(filt, 0u, |accum, &&n: uint| accum + n ); io::println(fmt!{"%u", sum}); }