26 lines
605 B
Rust
26 lines
605 B
Rust
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trait Mumbo {
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pure fn jumbo(&self, x: @uint) -> uint;
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fn jambo(&self, x: @const uint) -> uint;
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fn jbmbo(&self) -> @uint;
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}
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impl uint: Mumbo {
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// Cannot have a larger effect than the trait:
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fn jumbo(&self, x: @uint) { *self + *x; }
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//~^ ERROR expected pure fn but found impure fn
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// Cannot accept a narrower range of parameters:
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fn jambo(&self, x: @uint) { *self + *x; }
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//~^ ERROR values differ in mutability
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// Cannot return a wider range of values:
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fn jbmbo(&self) -> @const uint { @const 0 }
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//~^ ERROR values differ in mutability
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}
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fn main() {}
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