mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-30 10:35:03 +01:00
Nicholas Bishop
3bb245364f
This is similar to the previously-added support for accessing generic
carbon classes from C++, but with the specific defined by Carbon, rather
than being derived from template args supplied by clang in
`LoadExternalSpecializations`.
Example:
```carbon
class C(T: type) {
var t: T;
}
alias A = C(i32);
inline Cpp '''
void F() {
Carbon::A a;
a.t = 123;
}
'''
```
94 lines
2.5 KiB
Plaintext
94 lines
2.5 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 C(T: type) {
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var t: T;
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}
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inline Cpp '''
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void F() {
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Carbon::C<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 C(T: type) {
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var t: T;
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}
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alias A = C(i32);
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inline Cpp '''
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void F() {
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Carbon::A 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+4]]:1: error: semantics TODO: `failed to map specific type arg to C++` [SemanticsTodo]
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// CHECK:STDERR: class C(T: type) {
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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class C(T: type) {
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var t: T;
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}
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alias A = C(());
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inline Cpp '''
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void F() {
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// CHECK:STDERR: fail_unsupported_specific_arg.carbon:[[@LINE+8]]:11: error: semantics TODO: `interop with unsupported type` [SemanticsTodo]
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// CHECK:STDERR: Carbon::A a;
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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// CHECK:STDERR: fail_unsupported_specific_arg.carbon:[[@LINE+4]]:11: error: no type named 'A' in namespace 'Carbon' [CppInteropParseError]
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// CHECK:STDERR: 23 | Carbon::A a;
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// CHECK:STDERR: | ~~~~~~~~^
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// CHECK:STDERR:
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Carbon::A 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 C(T: type) {
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// CHECK:STDERR: fail_todo_generic_class_method_call.carbon:[[@LINE+4]]:3: error: semantics TODO: `non-class non-namespace name scope` [SemanticsTodo]
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// CHECK:STDERR: fn M(unused ref self) {}
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~
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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 F() {
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Carbon::C<int> c;
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// CHECK:STDERR: fail_todo_generic_class_method_call.carbon:[[@LINE+4]]:5: error: no member named 'M' in 'Carbon::C<int>' [CppInteropParseError]
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// CHECK:STDERR: 19 | c.M();
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// CHECK:STDERR: | ~ ^
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// CHECK:STDERR:
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c.M();
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}
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''';
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