mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-02 22:02:51 +01:00
Richard SmithandJon Ross-Perkins
663ed32b1b
Basic support for declaring, specifying the values of, and using associated constants. This is incomplete in various ways. For example, when checking whether a type satisfies a constraint, there is no check that its associated constants match those in the constraint, and name lookup into a value whose type is an associated constant is not supported yet. Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
47 lines
1.4 KiB
Plaintext
47 lines
1.4 KiB
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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// RUN: %{not} %{explorer} %s 2>&1 | \
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// RUN: %{FileCheck} --match-full-lines --allow-unused-prefixes=false %s
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// RUN: %{not} %{explorer} --parser_debug --trace_file=- %s 2>&1 | \
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// RUN: %{FileCheck} --match-full-lines --allow-unused-prefixes %s
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// AUTOUPDATE: %{explorer} %s
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package ExplorerTest api;
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interface A {
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let TA:! Type;
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fn FA() -> TA;
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}
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interface B {
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let TB:! Type;
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fn FB() -> TB;
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}
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class C(T:! Type) {
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impl as A & B where .TA == i32 and .TB == i32 {
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fn FA() -> i32 {
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// OK, know that TA is i32 here.
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let v: Self.(A.TA) = 1;
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let w: i32 = v;
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return w;
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}
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fn FB() -> i32 {
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// OK, know that TB is i32 here.
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let v: Self.(B.TB) = 2;
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// TODO: Don't know that TA is i32. It could be specialized.
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// We should reject this once we support specialization.
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let w: Self.(A.TA) = 3;
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return v + w;
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}
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}
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}
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external impl C(i32) as B where .TB == () {
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fn FB() -> () { return (); }
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// CHECK: COMPILATION ERROR: {{.*}}/explorer/testdata/assoc_const/fail_multi_impl_scoping.carbon:[[@LINE+1]]: ambiguous implementations of interface B for class C(T = i32)
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}
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fn Main() -> i32 { return C(i32).FB(); }
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