16 lines
344 B
Rust
16 lines
344 B
Rust
trait vec_monad<A> {
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fn bind<B>(f: fn(A) -> ~[B]);
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}
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impl<A> ~[A]: vec_monad<A> {
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fn bind<B>(f: fn(A) -> ~[B]) {
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let mut r = fail;
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for self.each |elt| { r += f(elt); }
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//~^ WARNING unreachable expression
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//~^^ ERROR the type of this value must be known
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}
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}
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fn main() {
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["hi"].bind({|x| [x] });
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}
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