rust/src/test/run-pass/ret-break-cont-in-block.rs

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use cmp::Eq;
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fn iter<T>(v: ~[T], it: fn(T) -> bool) {
let mut i = 0u, l = v.len();
while i < l {
if !it(v[i]) { break; }
i += 1u;
}
}
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fn find_pos<T:Eq>(n: T, h: ~[T]) -> Option<uint> {
let mut i = 0u;
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for iter(h) |e| {
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if e == n { return Some(i); }
i += 1u;
}
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None
}
fn bail_deep(x: ~[~[bool]]) {
let mut seen = false;
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for iter(x) |x| {
for iter(x) |x| {
assert !seen;
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if x { seen = true; return; }
}
}
assert !seen;
}
fn ret_deep() -> ~str {
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for iter(~[1, 2]) |e| {
for iter(~[3, 4]) |x| {
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if e + x > 4 { return ~"hi"; }
}
}
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return ~"bye";
}
fn main() {
let mut last = 0;
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for vec::all(~[1, 2, 3, 4, 5, 6, 7]) |e| {
last = e;
if e == 5 { break; }
if e % 2 == 1 { again; }
assert e % 2 == 0;
};
assert last == 5;
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assert find_pos(1, ~[0, 1, 2, 3]) == Some(1u);
assert find_pos(1, ~[0, 4, 2, 3]) == None;
assert find_pos(~"hi", ~[~"foo", ~"bar", ~"baz", ~"hi"]) == Some(3u);
bail_deep(~[~[false, false], ~[true, true], ~[false, true]]);
bail_deep(~[~[true]]);
bail_deep(~[~[false, false, false]]);
assert ret_deep() == ~"hi";
}