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94b466656e
It is really involved to change how methods and classes are emitted into the header so this patch introduces the impression of nested structs through using statements and still emits the structs themselves as top level structs. It emits them in their own namespace to avoid name collisions. This patch also had to change some names to be fully qualified to avoid some name lookup errors in case of nested structs. Moreover, nesting level of 3 and above requires C++17 because it relies on nested namespaces. Only nested structs are supported, not nested classes. Since this patch is already started to grow quite big, I decided to put it out for reviews and plan to address some of the shortcomings in a follow-up PR. rdar://118793469
152 lines
6.4 KiB
Swift
152 lines
6.4 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: %target-swift-frontend %s -typecheck -module-name Functions -enable-experimental-cxx-interop -clang-header-expose-decls=has-expose-attr-or-stdlib -enable-experimental-feature GenerateBindingsForThrowingFunctionsInCXX -emit-clang-header-path %t/functions.h
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// RUN: %FileCheck %s < %t/functions.h
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// RUN: %check-interop-cxx-header-in-clang(%t/functions.h -DSWIFT_CXX_INTEROP_HIDE_STL_OVERLAY -DSWIFT_CXX_INTEROP_EXPERIMENTAL_SWIFT_ERROR -Wno-unused-function)
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// for experimental feature GenerateBindingsForThrowingFunctionsInCXX:
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// REQUIRES: asserts
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// CHECK-LABEL: namespace Functions SWIFT_PRIVATE_ATTR SWIFT_SYMBOL_MODULE("Functions") {
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// CHECK-LABEL: namespace _impl {
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// CHECK: SWIFT_EXTERN void $s9Functions18emptyThrowFunctionyyKF(SWIFT_CONTEXT void * _Nonnull _ctx, SWIFT_ERROR_RESULT void * _Nullable * _Nullable _error) SWIFT_CALL; // emptyThrowFunction()
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// CHECK: SWIFT_EXTERN void $s9Functions18testDestroyedErroryyKF(SWIFT_CONTEXT void * _Nonnull _ctx, SWIFT_ERROR_RESULT void * _Nullable * _Nullable _error) SWIFT_CALL; // testDestroyedError()
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// CHECK: SWIFT_EXTERN void $s9Functions13throwFunctionyyKF(SWIFT_CONTEXT void * _Nonnull _ctx, SWIFT_ERROR_RESULT void * _Nullable * _Nullable _error) SWIFT_CALL; // throwFunction()
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// CHECK: SWIFT_EXTERN void $s9Functions28throwFunctionWithNeverReturns0E0OyKF(SWIFT_CONTEXT void * _Nonnull _ctx, SWIFT_ERROR_RESULT void * _Nullable * _Nullable _error) SWIFT_CALL; // throwFunctionWithNeverReturn()
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// CHECK: SWIFT_EXTERN ptrdiff_t $s9Functions31throwFunctionWithPossibleReturnyS2iKF(ptrdiff_t a, SWIFT_CONTEXT void * _Nonnull _ctx, SWIFT_ERROR_RESULT void * _Nullable * _Nullable _error) SWIFT_CALL; // throwFunctionWithPossibleReturn(_:)
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// CHECK: SWIFT_EXTERN ptrdiff_t $s9Functions23throwFunctionWithReturnSiyKF(SWIFT_CONTEXT void * _Nonnull _ctx, SWIFT_ERROR_RESULT void * _Nullable * _Nullable _error) SWIFT_CALL; // throwFunctionWithReturn()
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// CHECK: }
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@_expose(Cxx)
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public enum NaiveErrors : Error {
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case returnError
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case throwError
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public func getMessage() {
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print(self)
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}
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}
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@_expose(Cxx)
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public func emptyThrowFunction() throws { print("passEmptyThrowFunction") }
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// CHECK: SWIFT_INLINE_THUNK swift::ThrowingResult<void> emptyThrowFunction() SWIFT_SYMBOL("s:9Functions18emptyThrowFunctionyyKF") {
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// CHECK: void* opaqueError = nullptr;
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// CHECK: void* _ctx = nullptr;
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// CHECK: _impl::$s9Functions18emptyThrowFunctionyyKF(_ctx, &opaqueError);
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// CHECK: if (opaqueError != nullptr)
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// CHECK: #ifdef __cpp_exceptions
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// CHECK: throw (swift::Error(opaqueError));
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// CHECK: #else
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// CHECK: return swift::Expected<void>(swift::Error(opaqueError));
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// CHECK: #endif
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// CHECK: }
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class TestDestroyed {
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deinit {
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print("Test destroyed")
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}
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}
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@_expose(Cxx)
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public struct DestroyedError : Error {
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let t = TestDestroyed()
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}
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@_expose(Cxx)
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public func testDestroyedError() throws { throw DestroyedError() }
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// CHECK: SWIFT_INLINE_THUNK swift::ThrowingResult<void> testDestroyedError() SWIFT_SYMBOL("s:9Functions18testDestroyedErroryyKF") {
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// CHECK: void* opaqueError = nullptr;
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// CHECK: void* _ctx = nullptr;
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// CHECK: _impl::$s9Functions18testDestroyedErroryyKF(_ctx, &opaqueError);
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// CHECK: if (opaqueError != nullptr)
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// CHECK: #ifdef __cpp_exceptions
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// CHECK: throw (swift::Error(opaqueError));
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// CHECK: #else
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// CHECK: return swift::Expected<void>(swift::Error(opaqueError));
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// CHECK: #endif
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// CHECK: }
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@_expose(Cxx)
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public func throwFunction() throws {
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print("passThrowFunction")
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throw NaiveErrors.throwError
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}
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// CHECK: SWIFT_INLINE_THUNK swift::ThrowingResult<void> throwFunction() SWIFT_SYMBOL("s:9Functions13throwFunctionyyKF") {
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// CHECK: void* opaqueError = nullptr;
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// CHECK: void* _ctx = nullptr;
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// CHECK: _impl::$s9Functions13throwFunctionyyKF(_ctx, &opaqueError);
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// CHECK: if (opaqueError != nullptr)
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// CHECK: #ifdef __cpp_exceptions
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// CHECK: throw (swift::Error(opaqueError));
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// CHECK: #else
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// CHECK: return swift::Expected<void>(swift::Error(opaqueError));
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// CHECK: #endif
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// CHECK: }
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@_expose(Cxx)
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public func throwFunctionWithNeverReturn() throws -> Never {
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print("passThrowFunctionWithNeverReturn")
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throw NaiveErrors.returnError
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}
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// CHECK: SWIFT_INLINE_THUNK swift::ThrowingResult<void> throwFunctionWithNeverReturn() SWIFT_SYMBOL("s:9Functions28throwFunctionWithNeverReturns0E0OyKF") SWIFT_NORETURN_EXCEPT_ERRORS {
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// CHECK-NEXT: void* opaqueError = nullptr;
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// CHECK-NEXT: void* _ctx = nullptr;
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// CHECK-NEXT: _impl::$s9Functions28throwFunctionWithNeverReturns0E0OyKF(_ctx, &opaqueError);
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// CHECK-NEXT: if (opaqueError != nullptr)
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// CHECK-NEXT: #ifdef __cpp_exceptions
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// CHECK-NEXT: throw (swift::Error(opaqueError));
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// CHECK-NEXT: #else
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// CHECK-NEXT: return swift::Expected<void>(swift::Error(opaqueError));
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// CHECK-NEXT: #endif
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// CHECK-NEXT: abort();
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// CHECK-NEXT: }
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@_expose(Cxx)
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public func throwFunctionWithPossibleReturn(_ a: Int) throws -> Int {
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print("passThrowFunctionWithPossibleReturn")
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if (a == 0) {
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throw NaiveErrors.returnError
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}
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return 0
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}
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// CHECK: SWIFT_INLINE_THUNK swift::ThrowingResult<swift::Int> throwFunctionWithPossibleReturn(swift::Int a) SWIFT_SYMBOL("s:9Functions31throwFunctionWithPossibleReturnyS2iKF") SWIFT_WARN_UNUSED_RESULT {
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// CHECK: void* opaqueError = nullptr;
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// CHECK: void* _ctx = nullptr;
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// CHECK: auto returnValue = Functions::_impl::$s9Functions31throwFunctionWithPossibleReturnyS2iKF(a, _ctx, &opaqueError);
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// CHECK: if (opaqueError != nullptr)
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// CHECK: #ifdef __cpp_exceptions
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// CHECK: throw (swift::Error(opaqueError));
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// CHECK: #else
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// CHECK: return swift::Expected<swift::Int>(swift::Error(opaqueError));
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// CHECK: #endif
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// CHECK: return SWIFT_RETURN_THUNK(swift::Int, returnValue);
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// CHECK: }
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@_expose(Cxx)
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public func throwFunctionWithReturn() throws -> Int {
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print("passThrowFunctionWithReturn")
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throw NaiveErrors.returnError
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return 0
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}
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// CHECK: SWIFT_INLINE_THUNK swift::ThrowingResult<swift::Int> throwFunctionWithReturn() SWIFT_SYMBOL("s:9Functions23throwFunctionWithReturnSiyKF") SWIFT_WARN_UNUSED_RESULT {
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// CHECK: void* opaqueError = nullptr;
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// CHECK: void* _ctx = nullptr;
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// CHECK: auto returnValue = Functions::_impl::$s9Functions23throwFunctionWithReturnSiyKF(_ctx, &opaqueError);
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// CHECK: #ifdef __cpp_exceptions
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// CHECK: throw (swift::Error(opaqueError));
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// CHECK: #else
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// CHECK: return swift::Expected<swift::Int>(swift::Error(opaqueError));
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// CHECK: #endif
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// CHECK: return SWIFT_RETURN_THUNK(swift::Int, returnValue);
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// CHECK: }
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