mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-02 08:35:48 +01:00
Richard Smith
adc78fbdb0
Instead of checking and resolving rewrites eagerly, defer doing so until a constraint is applied to a binding. Actual resolution of rewrites is not yet implemented, so this is mostly just refactoring, but the eventual goal is to support things like `(Constraint where .T = .U) & (Constraint where .U = V)` (however they are reached) by applying one rewrite to the other, as agreed with @josh11b in discussion of #2173. One nice consequence is that substitution into a constraint type no longer has a failure path, so substitution is once again not able to fail.
21 lines
664 B
Plaintext
21 lines
664 B
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
|
|
// Exceptions. See /LICENSE for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
// AUTOUPDATE
|
|
// RUN: %{not} %{explorer-run}
|
|
// RUN: %{not} %{explorer-run-trace}
|
|
|
|
package ExplorerTest api;
|
|
|
|
interface HasType {
|
|
let T:! Type;
|
|
}
|
|
|
|
// CHECK:STDERR: COMPILATION ERROR: {{.*}}/explorer/testdata/assoc_const/fail_overspecified_impl.carbon:[[@LINE+3]]: multiple different rewrites for `(i32).(HasType.T)`:
|
|
// CHECK:STDERR: i32
|
|
// CHECK:STDERR: {.a: i32}
|
|
external impl i32 as HasType where .T = i32 and .T = {.a: i32} {}
|
|
|
|
fn Main() -> i32 { return 0; }
|