// 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. // Tests that impl methods are matched to traits exactly: // we might be tempted to think matching is contravariant, but if // we let an impl method can have more permissive bounds than the trait // method it's implementing, the return type might be less specific than // needed. Just punt and make it invariant. use iter::BaseIter; trait A { fn b(x: C) -> C; } struct E { f: int } impl E: A { fn b(_x: F) -> F { die!() } //~ ERROR in method `b`, type parameter 0 has 1 bound, but } fn main() {}