2a74fda316
the types. Initially I thought it would be necessary to thread this data through not only the AST but the types themselves, but then I remembered that the pretty printer only cares about the AST. Regardless, I have elected to leave the changes to the types intact since they will eventually be needed. I left a few FIXMEs where it didn't seem worth finishing up since the code wasn't crucial yet.
34 lines
1.1 KiB
Rust
34 lines
1.1 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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// Issue #2263.
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// Should pass region checking.
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fn ok(f: @fn(x: &uint)) {
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// Here, g is a function that can accept a uint pointer with
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// lifetime r, and f is a function that can accept a uint pointer
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// with any lifetime. The assignment g = f should be OK (i.e.,
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// f's type should be a subtype of g's type), because f can be
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// used in any context that expects g's type. But this currently
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// fails.
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let mut g: @fn<'r>(y: &'r uint) = |x| { };
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g = f;
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}
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// This version is the same as above, except that here, g's type is
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// inferred.
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fn ok_inferred(f: @fn(x: &uint)) {
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let mut g: @fn<'r>(x: &'r uint) = |_| {};
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g = f;
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}
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pub fn main() {
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}
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