0c48c5712d
Doing so would incur deeply nested expansion of the tree with no useful side effects. This is problematic for "wide" data types such as structs with dozens of fields but where only a few are actually being matched or bound. Most notably, matching a fixed slice would use a number of stack frames that grows with the number of elements in the slice. Fixes #17877.
22 lines
663 B
Rust
22 lines
663 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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fn main() {
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assert_eq!(match [0u8, ..1024] {
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_ => 42u,
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}, 42u);
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assert_eq!(match [0u8, ..1024] {
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[1, _..] => 0u,
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[0, _..] => 1u,
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_ => 2u
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}, 1u);
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}
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