bc9ae36dba
us to construct trait-references and do other things without forcing a full evaluation of the supertraits. One downside of this scheme is that we must invoke `ensure_super_predicates` before using any construct that might require knowing about the super-predicates.
26 lines
770 B
Rust
26 lines
770 B
Rust
// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// Test a supertrait cycle where the first trait we find (`A`) is not
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// a direct participant in the cycle.
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trait A: B {
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//~^ ERROR unsupported cyclic reference
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}
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trait B: C {
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//~^ ERROR unsupported cyclic reference
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}
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trait C: B { }
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//~^ ERROR unsupported cyclic reference
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fn main() { }
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