42344af713
common supertypes. This was breaking with the change to regions because of the (now incorrect) assumpton that our inference code makes, which is that if a <: b succeeds, there is no need to compute the LUB/GLB.
52 lines
1.4 KiB
Rust
52 lines
1.4 KiB
Rust
// Copyright 2012 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 we correctly consider the type of `match` to be the LUB
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// of the various arms, particularly in the case where regions are
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// involved.
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pub fn opt_str0<'a>(maybestr: &'a Option<~str>) -> &'a str {
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if maybestr.is_none() {
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"(none)"
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} else {
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let s: &'a str = *maybestr.get_ref();
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s
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}
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}
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pub fn opt_str1<'a>(maybestr: &'a Option<~str>) -> &'a str {
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if maybestr.is_some() {
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let s: &'a str = *maybestr.get_ref();
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s
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} else {
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"(none)"
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}
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}
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pub fn opt_str2<'a>(maybestr: &'a Option<~str>) -> &'static str {
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if maybestr.is_none() { //~ ERROR mismatched types
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"(none)"
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} else {
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let s: &'a str = *maybestr.get_ref();
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s
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}
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}
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pub fn opt_str3<'a>(maybestr: &'a Option<~str>) -> &'static str {
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if maybestr.is_some() { //~ ERROR mismatched types
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let s: &'a str = *maybestr.get_ref();
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s
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} else {
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"(none)"
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}
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}
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fn main() {} |