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Interop: support all C++ integer types that map to intN_t or uintN_t. (#5836)

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Expand support for `int` and `short` to cover all the other `intN_t` and
`uintN_t` types too. We achieve this by asking Clang what the `intN_t` /
`uintN_t` type that it would use for the given bitwidth is, and checking
if that's the type we're trying to map.
This commit is contained in:
Richard Smith
2025-07-22 21:29:09 +00:00
committed by GitHub
parent b01767a5e4
commit c90c6728fd
5 changed files with 174 additions and 38 deletions
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toolchain/check/testdata/interop/cpp/include_paths.carbon
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+4 -14
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@@ -3,6 +3,7 @@
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/uint.carbon
// EXTRA-ARGS: --target=x86_64-linux-gnu
//
// AUTOUPDATE
// TIP: To test this file alone, run:
@@ -18,7 +19,6 @@
#include <stddef.h>
ptrdiff_t GetSize();
inline int GetSizeAsInt() { return GetSize(); }
// --- import_stddef_indirectly.carbon
@@ -26,24 +26,14 @@ library "[[@TEST_NAME]]";
import Cpp library "include_stddef.h";
// TODO: `fn CallGetSize() -> Cpp.ptrdiff_t {`
fn CallGetSize() -> i32 {
// TODO: Call `Cpp.GetSize` directly once we can import the types `long` and `long long`.
return Cpp.GetSizeAsInt() as i32;
fn CallGetSize() -> Cpp.ptrdiff_t {
return Cpp.GetSize();
}
// --- fail_todo_import_stddef_directly.carbon
// --- import_stddef_directly.carbon
library "[[@TEST_NAME]]";
import Cpp library "stddef.h";
// TODO: Once we can import `unsigned long` / `unsigned long long`, this should work.
// CHECK:STDERR: fail_todo_import_stddef_directly.carbon:[[@LINE+7]]:8: error: semantics TODO: `Unsupported: Type declaration: size_t` [SemanticsTodo]
// CHECK:STDERR: var n: Cpp.size_t = 42;
// CHECK:STDERR: ^~~~~~~~~~
// CHECK:STDERR: fail_todo_import_stddef_directly.carbon:[[@LINE+4]]:8: note: in `Cpp` name lookup for `size_t` [InCppNameLookup]
// CHECK:STDERR: var n: Cpp.size_t = 42;
// CHECK:STDERR: ^~~~~~~~~~
// CHECK:STDERR:
var n: Cpp.size_t = 42;