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https://github.com/carbon-language/carbon-lang.git
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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
1.9 KiB
Plaintext
84 lines
1.9 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/interop/cpp/namespace/export.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/namespace/export.carbon
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// --- other.carbon
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package Other;
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namespace Nested;
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namespace Nested.Again;
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class Class1;
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// --- namespace.carbon
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library "[[@TEST_NAME]]";
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import Other;
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import Cpp inline '''
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namespace X = Carbon::Other;
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namespace Y = Carbon::Other::Nested;
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namespace Z = Carbon::Other::Nested::Again;
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Carbon::Other::Class1 *glbl;
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template<typename T> void f1() {
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T* v;
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}
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void f2() {
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f1<Carbon::Other::Class1>();
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}
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''';
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// --- alias_identity.carbon
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import Cpp;
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namespace M;
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alias N = M;
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class M.C {}
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inline Cpp '''
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// OK, valid redeclaration: M and N are the same namespace.
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namespace A = Carbon::M;
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namespace A = Carbon::N;
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// Valid: M::C and N::C are the same class.
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Carbon::M::C *pmc;
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Carbon::N::C *pnc = pmc;
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''';
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// --- fail_current_package_not_in_carbon.carbon
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package SelfPkg;
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import Cpp;
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class C {}
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inline Cpp '''
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Carbon::C* p;
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// CHECK:STDERR: fail_current_package_not_in_carbon.carbon:[[@LINE+2]]:25: error: expected namespace name [CppInteropParseError]
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// CHECK:STDERR:
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namespace Bad = Carbon::SelfPkg;
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''';
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// --- fail_main_package_not_in_carbon.carbon
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library "[[@TEST_NAME]]";
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import Cpp;
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class C {}
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inline Cpp '''
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Carbon::C* p;
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// CHECK:STDERR: fail_main_package_not_in_carbon.carbon:[[@LINE+2]]:25: error: expected namespace name [CppInteropParseError]
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// CHECK:STDERR:
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namespace Bad = Carbon::Main;
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''';
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