mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Richard Smith
9e8cacae00
Basic support for named constraints as described in [the generics design](https://github.com/carbon-language/carbon-lang/blob/trunk/docs/design/generics/details.md#named-constraints). Support is provided for `extends` and `impl` declarations in `constraint`, but not yet for member aliases. The missing prelude named constraints `Add`, `Mul`, `Ordered`, etc. are also added.
28 lines
777 B
Plaintext
28 lines
777 B
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// AUTOUPDATE
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// RUN: %{not} %{explorer-run}
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// RUN: %{not} %{explorer-run-trace}
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package ExplorerTest api;
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interface A { fn F() -> i32; }
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interface B { fn G() -> i32; }
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// CHECK:STDERR: COMPILATION ERROR: {{.*}}/explorer/testdata/constraint/fail_missing_member.carbon:[[@LINE+1]]: member access, H not in interface A & interface B where T is interface A and T is interface B
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fn Get[T:! A & B](n: T) -> i32 { return n.H(); }
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impl i32 as A {
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fn F() -> i32 { return 1; }
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}
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impl i32 as B {
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fn G() -> i32 { return 2; }
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}
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fn Main() -> i32 {
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var z: i32 = 0;
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return Get(z);
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}
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