9153d8ad6c
parameters This involves numerous substeps: 1. Treat Self same as any other parameter. 2. No longer compute offsets for method parameters. 3. Store all generic types (both trait/impl and method) with a method, eliminating odd discrepancies. 4. Stop doing unspeakable things to static methods and instead just use the natural types, now that we can easily add the type parameters from trait into the method's polytype. 5. No doubt some more. It was hard to separate these into distinct commits. Fixes #13564
43 lines
1.4 KiB
Rust
43 lines
1.4 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
|
|
// file at the top-level directory of this distribution and at
|
|
// http://rust-lang.org/COPYRIGHT.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
// Test that we correctly infer variance for region parameters in
|
|
// case that involve multiple intracrate types.
|
|
// Try enums too.
|
|
|
|
#[rustc_variance]
|
|
enum Base<'a, 'b, 'c, 'd> { //~ ERROR regions=[[+, -, o, *];[];[]]
|
|
Test8A(extern "Rust" fn(&'a int)),
|
|
Test8B(&'b [int]),
|
|
Test8C(&'b mut &'c str),
|
|
}
|
|
|
|
#[rustc_variance]
|
|
struct Derived1<'w, 'x, 'y, 'z> { //~ ERROR regions=[[*, o, -, +];[];[]]
|
|
f: Base<'z, 'y, 'x, 'w>
|
|
}
|
|
|
|
#[rustc_variance] // Combine - and + to yield o
|
|
struct Derived2<'a, 'b, 'c> { //~ ERROR regions=[[o, o, *];[];[]]
|
|
f: Base<'a, 'a, 'b, 'c>
|
|
}
|
|
|
|
#[rustc_variance] // Combine + and o to yield o (just pay attention to 'a here)
|
|
struct Derived3<'a, 'b, 'c> { //~ ERROR regions=[[o, -, *];[];[]]
|
|
f: Base<'a, 'b, 'a, 'c>
|
|
}
|
|
|
|
#[rustc_variance] // Combine + and * to yield + (just pay attention to 'a here)
|
|
struct Derived4<'a, 'b, 'c> { //~ ERROR regions=[[+, -, o];[];[]]
|
|
f: Base<'a, 'b, 'c, 'a>
|
|
}
|
|
|
|
fn main() {}
|