mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-11-15 20:38:11 +00:00
Richard Smith
09b79784dc
When exporting `X` from Carbon package `Foo`, expose it to C++ with fully-qualified name `Carbon::Foo::X`, not simply `Carbon::X`. This ensures that C++ mangled names properly distinguish between same-named Carbon entities in different packages. Name *lookup* into `Carbon::` still uses the same rules as before: it finds what a `package.` lookup would find in Carbon. So `X` is named from C++ as `Carbon::X` still, and a lookup for `Carbon::Foo` fails, even though `X`'s "true name" is now `Carbon::Foo::X`. Assisted-by: Gemini via Antigravity
84 lines
2.4 KiB
Plaintext
84 lines
2.4 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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// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/int.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/interop/cpp/class/export/generic.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/interop/cpp/class/export/generic.carbon
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// --- generic_class.carbon
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library "[[@TEST_NAME]]";
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import Cpp;
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class GenericClass(T: type) {
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var t: T;
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}
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inline Cpp '''
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void FGeneric() {
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Carbon::GenericClass<int> c;
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c.t = 123;
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}
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''';
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// --- specific_alias.carbon
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library "[[@TEST_NAME]]";
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import Cpp;
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class SpecificClass(T: type) {
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var t: T;
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}
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alias AliasInt = SpecificClass(i32);
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inline Cpp '''
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void FSpecific() {
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Carbon::AliasInt a;
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a.t = 123;
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}
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''';
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// --- fail_unsupported_specific_arg.carbon
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library "[[@TEST_NAME]]";
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import Cpp;
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// CHECK:STDERR: fail_unsupported_specific_arg.carbon:[[@LINE+2]]:1-33: error: semantics TODO: `failed to map specific type arg to C++` [SemanticsTodo]
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// CHECK:STDERR:
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class UnsupportedClass(T: type) {
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var t: T;
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}
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alias AliasEmptyTuple = UnsupportedClass(());
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inline Cpp '''
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void FUnsupported() {
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// CHECK:STDERR: fail_unsupported_specific_arg.carbon:[[@LINE+4]]:11: error: semantics TODO: `interop with unsupported type` [SemanticsTodo]
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// CHECK:STDERR:
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// CHECK:STDERR: fail_unsupported_specific_arg.carbon:[[@LINE+2]]:11: error: no type named 'AliasEmptyTuple' in namespace 'Carbon' [CppInteropParseError]
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// CHECK:STDERR:
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Carbon::AliasEmptyTuple a;
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a.t = 123;
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}
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''';
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// --- fail_todo_generic_class_method_call.carbon
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library "[[@TEST_NAME]]";
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import Cpp;
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class ClassWithMethod(T: type) {
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// CHECK:STDERR: fail_todo_generic_class_method_call.carbon:[[@LINE+2]]:3-25: error: semantics TODO: `non-class non-namespace name scope` [SemanticsTodo]
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// CHECK:STDERR:
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fn M(unused ref self) {}
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}
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inline Cpp '''
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void FMethodCall() {
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Carbon::ClassWithMethod<int> c;
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// CHECK:STDERR: fail_todo_generic_class_method_call.carbon:[[@LINE+2]]:5: error: no member named 'M' in 'Carbon::Main::ClassWithMethod<int>' [CppInteropParseError]
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// CHECK:STDERR:
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c.M();
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}
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''';
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