6f3c202d3e
Previously, they were treated like ~[] and &[] (which can have length 0), but fixed length vectors are fixed length, i.e. we know at compile time if it's possible to have length zero (which is only for [T, .. 0]). Fixes #11659.
27 lines
946 B
Rust
27 lines
946 B
Rust
// Copyright 2014 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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// issue #11659, the compiler needs to know that a fixed length vector
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// always requires instantiable contents to instantiable itself
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// (unlike a ~[] vector which can have length zero).
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// ~ to avoid infinite size.
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struct Uninstantiable { //~ ERROR cannot be instantiated without an instance of itself
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p: ~[Uninstantiable, .. 1]
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}
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struct Instantiable { p: ~[Instantiable, .. 0] }
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fn main() {
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let _ = None::<Uninstantiable>;
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let _ = Instantiable { p: ~([]) };
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}
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