rust/src/test/run-pass/block-iter-2.rs

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fn iter_vec<T>(v: [T], f: block(T)) { for x: T in v { f(x); } }
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fn main() {
let v = [1, 2, 3, 4, 5];
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let sum = 0;
iter_vec(v, {|i| iter_vec(v, {|j| log_err i * j; sum += i * j; }); });
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log_err sum;
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assert (sum == 225);
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}