carbon-language/carbon-lang
1
0
Fork 0
mirror of https://github.com/carbon-language/carbon-lang.git synced 2026-10-03 17:36:06 +01:00
Code Issues Packages Projects Releases 10 Wiki Activity

Support exporting class specifics to C++ (#7634)

Browse Source 
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;
}
'''
```
This commit is contained in:
Nicholas Bishop
2026-08-13 23:30:24 +00:00
committed by GitHub
parent 54b7f1345a
commit 3bb245364f
5 changed files with 125 additions and 54 deletions
Download Patch File Download Diff File Expand all files Collapse all files
toolchain/check/testdata/interop/cpp/function/export/generic.carbon
Vendored
+8 -12
View File
@@ -90,11 +90,11 @@ void G() {
library "[[@TEST_NAME]]";
import Cpp;
// CHECK:STDERR: fail_todo_enclosing_generic.carbon:[[@LINE+4]]:1: error: semantics TODO: `interop with specific class` [SemanticsTodo]
// CHECK:STDERR: class A(T: type) {
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
class A(T: type) {
// CHECK:STDERR: fail_todo_enclosing_generic.carbon:[[@LINE+4]]:3: error: semantics TODO: `non-class non-namespace name scope` [SemanticsTodo]
// CHECK:STDERR: fn F[U: type](x: T, y: U);
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
fn F[U: type](x: T, y: U);
}
alias B = A(i32);
@@ -104,15 +104,11 @@ void f() {
// TODO: this currently fails because `B` can't be imported, but the intent
// is to test a generic function within an enclosing generic scope.
//
// CHECK:STDERR: fail_todo_enclosing_generic.carbon:[[@LINE+8]]:11: error: semantics TODO: `interop with unsupported type` [SemanticsTodo]
// CHECK:STDERR: Carbon::B b;
// CHECK:STDERR: ^
// CHECK:STDERR:
// CHECK:STDERR: fail_todo_enclosing_generic.carbon:[[@LINE+4]]:11: error: no type named 'B' in namespace 'Carbon' [CppInteropParseError]
// CHECK:STDERR: 26 | Carbon::B b;
// CHECK:STDERR: | ~~~~~~~~^
// CHECK:STDERR:
Carbon::B b;
// CHECK:STDERR: fail_todo_enclosing_generic.carbon:[[@LINE+4]]:5: error: no member named 'F' in 'Carbon::A<int>' [CppInteropParseError]
// CHECK:STDERR: 23 | b.F(1, 2);
// CHECK:STDERR: | ~ ^
// CHECK:STDERR:
b.F(1, 2);
}
''';