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Support C++ calling Carbon functions with ref parameters (#7107)

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When creating the C++ thunk, make the parameters references if the
corresponding callee parameters are `ref`s.

When creating the Carbon thunk, tag the call arguments as `ref` if the
corresponding callee parameters are `ref`s.
This commit is contained in:
Nicholas Bishop
2026-04-23 23:45:26 +00:00
committed by GitHub
parent 709776ad1c
commit 3f63cf4b10
4 changed files with 151 additions and 30 deletions
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toolchain/check/testdata/interop/cpp/function/export/function.carbon
Vendored
+15 -15
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@@ -20,10 +20,6 @@ fn F3(_: i32) {}
fn HasGenericArg(T:! type, a: T) { a; }
fn HasDeducedArg[T:! type](a: T) { a; }
class C {
fn Method[self: Self]() { self; }
}
// --- function.carbon
library "[[@TEST_NAME]]";
@@ -57,6 +53,21 @@ void G() {
}
''';
// --- ref_arg.carbon
library "[[@TEST_NAME]]";
import Cpp;
fn F(ref n: i32);
inline Cpp '''
void G() {
int n = 0;
Carbon::F(n);
}
''';
// --- using.carbon
library "[[@TEST_NAME]]";
@@ -113,14 +124,3 @@ void G() {
Carbon::Other::HasDeducedArg(123);
}
''';
// --- method.carbon
library "[[@TEST_NAME]]";
import Other;
import Cpp inline '''
void G() {
Carbon::Other::C().Method();
}
''';