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https://github.com/carbon-language/carbon-lang.git
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Richard Smith
dd7cfdb149
Implement the alias rules from proposal #5389, wherein an alias is permitted so long as the target has a constant value. While that proposal is not yet accepted, this seems like a reasonable basis for further iteration, and will be useful for the examples we're currently pursuing.
69 lines
2.0 KiB
Plaintext
69 lines
2.0 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/none.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/alias/in_namespace.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/alias/in_namespace.carbon
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// --- in_namespace.carbon
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library "[[@TEST_NAME]]";
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class C { var v: (); }
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//@dump-sem-ir-begin
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namespace NS;
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alias NS.a = C;
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//@dump-sem-ir-end
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let b: NS.a = {.v = ()};
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fn F() -> NS.a {
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return {.v = ()};
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}
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// --- fail_local_in_namespace.carbon
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library "[[@TEST_NAME]]";
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namespace NS;
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fn F() -> {} {
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// CHECK:STDERR: fail_local_in_namespace.carbon:[[@LINE+4]]:9: error: name `NS` not found [NameNotFound]
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// CHECK:STDERR: alias NS.a = {};
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// CHECK:STDERR: ^~
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// CHECK:STDERR:
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alias NS.a = {};
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// CHECK:STDERR: fail_local_in_namespace.carbon:[[@LINE+4]]:10: error: member name `a` not found in `NS` [MemberNameNotFoundInInstScope]
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// CHECK:STDERR: return NS.a;
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// CHECK:STDERR: ^~~~
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// CHECK:STDERR:
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return NS.a;
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}
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// CHECK:STDOUT: --- in_namespace.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %C: type = class_type @C [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: file {
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// CHECK:STDOUT: %NS: <namespace> = namespace [concrete] {
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// CHECK:STDOUT: .C = <poisoned>
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// CHECK:STDOUT: .a = %a
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %C.ref: type = name_ref C, %C.decl [concrete = constants.%C]
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// CHECK:STDOUT: %a: type = alias_binding a, %C.ref [concrete = constants.%C]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @__global_init() {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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