mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-05 22:02:55 +01:00
Richard Smith
ce080b3549
When a class extends an interface, referring to a member name of the interface as an unqualified name should refer to the class's corresponding associated entity value, not to the associated entity itself. Similarly, in an `impl`, unqualified names of associated entities should refer to the `impl`'s corresponding value for that entity. To support this, we treat `impl`s as `extend`ing their implemented facet type, and we make lookups into an extended facet type use the `Self` type of the extending `impl` or `class` if lookup finds an associated entity. We already did the latter if the extending entity was an interface; this extends the existing support for these other cases.
54 lines
1.8 KiB
Plaintext
54 lines
1.8 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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// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/convert.carbon
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//
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// AUTOUPDATE
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// TIP: To test this file alone, run:
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// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/impl/name_poisoning.carbon
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// TIP: To dump output, run:
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// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/impl/name_poisoning.carbon
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// --- using_poisoned_name_in_impl.carbon
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library "[[@TEST_NAME]]";
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interface I {};
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namespace N;
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// Use `package.I` and poison `N.I`.
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fn N.F1(x:! I);
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class N.C {
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extend impl as I {
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}
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}
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// --- fail_impl_function_poisoned.carbon
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library "[[@TEST_NAME]]";
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interface I {
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fn A(x: Self);
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fn B();
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}
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class B {
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impl as I {
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// CHECK:STDERR: fail_impl_function_poisoned.carbon:[[@LINE+11]]:13: error: accessing member from impl before it has a defined value [ImplAccessMemberBeforeSet]
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// CHECK:STDERR: fn A(x: B);
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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// CHECK:STDERR: fail_impl_function_poisoned.carbon:[[@LINE+7]]:13: error: cannot implicitly convert non-type value of type `<type of B in B as I>` to `type` [ConversionFailureNonTypeToFacet]
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// CHECK:STDERR: fn A(x: B);
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// CHECK:STDERR: ^
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// CHECK:STDERR: fail_impl_function_poisoned.carbon:[[@LINE+4]]:13: note: type `<type of B in B as I>` does not implement interface `Core.ImplicitAs(type)` [MissingImplInMemberAccessInContext]
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// CHECK:STDERR: fn A(x: B);
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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fn A(x: B);
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fn B();
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}
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}
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