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fdb188ccfd
Implementation of unused pattern bindings #2022, continued. Whereas previous PR #6460 took care of parsing, and PR #6479 prepared the stage by using _ in some test cases, this PR has the the actual implementation, using a simple dataflow analysis. --------- Co-authored-by: Burak Emir <bqe@google.com> Co-authored-by: jonmeow <jperkins@google.com>
56 lines
1.7 KiB
Plaintext
56 lines
1.7 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/extend_final.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/extend_final.carbon
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// --- extend_final_impl.carbon
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library "[[@TEST_NAME]]";
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interface Z {
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let X:! type;
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}
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class C {
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extend final impl as Z where .X = () {}
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}
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fn F() {
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let unused b: C.X = ();
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}
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// --- fail_final_extend_impl.carbon
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library "[[@TEST_NAME]]";
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interface Z {}
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class C {
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// CHECK:STDERR: fail_final_extend_impl.carbon:[[@LINE+7]]:9: error: `extend` must appear before `final` [ModifierMustAppearBefore]
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// CHECK:STDERR: final extend impl as Z {}
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// CHECK:STDERR: ^~~~~~
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// CHECK:STDERR: fail_final_extend_impl.carbon:[[@LINE+4]]:3: note: `final` previously appeared here [ModifierPrevious]
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// CHECK:STDERR: final extend impl as Z {}
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// CHECK:STDERR: ^~~~~
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// CHECK:STDERR:
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final extend impl as Z {}
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}
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// --- fail_final_extend_impl_outside_class.carbon
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library "[[@TEST_NAME]]";
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interface Z {}
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class C {}
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// CHECK:STDERR: fail_final_extend_impl_outside_class.carbon:[[@LINE+4]]:1: error: `extend impl` can only be used in an interface or class [ExtendImplOutsideClass]
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// CHECK:STDERR: extend final impl C as Z {}
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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extend final impl C as Z {}
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