90449abcb3
By carefully distinguishing falling back to the default arm from moving on to the next pattern, this patch adjusts the codegen logic for range and guarded arms of pattern matching expression. It is a more appropriate way of fixing #12582 and #13027 without causing regressions such as #13867. Closes #13867
58 lines
1.4 KiB
Rust
58 lines
1.4 KiB
Rust
// Copyright 2012-2014 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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// Test that codegen works correctly when there are multiple refutable
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// patterns in match expression.
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enum Foo {
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FooUint(uint),
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FooNullary,
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}
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fn main() {
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let r = match (FooNullary, 'a') {
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(FooUint(..), 'a'..'z') => 1,
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(FooNullary, 'x') => 2,
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_ => 0
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};
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assert_eq!(r, 0);
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let r = match (FooUint(0), 'a') {
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(FooUint(1), 'a'..'z') => 1,
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(FooUint(..), 'x') => 2,
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(FooNullary, 'a') => 3,
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_ => 0
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};
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assert_eq!(r, 0);
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let r = match ('a', FooUint(0)) {
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('a'..'z', FooUint(1)) => 1,
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('x', FooUint(..)) => 2,
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('a', FooNullary) => 3,
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_ => 0
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};
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assert_eq!(r, 0);
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let r = match ('a', 'a') {
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('a'..'z', 'b') => 1,
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('x', 'a'..'z') => 2,
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_ => 0
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};
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assert_eq!(r, 0);
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let r = match ('a', 'a') {
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('a'..'z', 'b') => 1,
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('x', 'a'..'z') => 2,
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('a', 'a') => 3,
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_ => 0
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};
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assert_eq!(r, 3);
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}
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