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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
trait Mumbo {
pure fn jumbo(&self, x: @uint) -> uint;
fn jambo(&self, x: @const uint) -> uint;
fn jbmbo(&self) -> @uint;
}
impl Mumbo for uint {
// Cannot have a larger effect than the trait:
fn jumbo(&self, x: @uint) { *self + *x; }
//~^ ERROR expected pure fn but found impure fn
// Cannot accept a narrower range of parameters:
fn jambo(&self, x: @uint) { *self + *x; }
//~^ ERROR values differ in mutability
// Cannot return a wider range of values:
fn jbmbo(&self) -> @const uint { @const 0 }
//~^ ERROR values differ in mutability
}
fn main() {}
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