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da07ff577c
PrintAsClang is supposed to emit declarations in the same order regardless of the compiler’s internal state, but we have repeatedly found that our current criteria are inadequate, resulting in non-functionality-affecting changes to generated header content. Add a diagnostic that’s emitted when this happens soliciting a bug report. Since there *should* be no cases where the compiler fails to order declarations, this diagnostic is never actually emitted. Instead, we test this change by enabling `-verify` on nearly all PrintAsClang tests to make sure they are unaffected. This did demonstrate a missing criterion that only mattered in C++ mode: extensions that varied only in their generic signature were not sorted stably. Add a sort criterion for this.
53 lines
1.6 KiB
Swift
53 lines
1.6 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: %target-swift-frontend %s -module-name Structs -clang-header-expose-decls=all-public -typecheck -verify -emit-clang-header-path %t/structs.h
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// RUN: %FileCheck %s < %t/structs.h
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// CHECK: namespace Structs SWIFT_PRIVATE_ATTR SWIFT_SYMBOL_MODULE("Structs") {
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// CHECK-NOT: class SWIFT_SYMBOL({{.*}}) ZeroSizedStruct final {
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public struct ZeroSizedStruct {}
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public struct ZeroSizedStruct2 {
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var property: ZeroSizedStruct
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var void: Void
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var bar: ()
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public init() {
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property = .init()
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}
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}
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public enum ZeroSizedEnum {
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}
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public enum ZeroSizedEnum2 {
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case foo
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}
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public enum ZeroSizedEnum3 {
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case foo(ZeroSizedStruct, ZeroSizedEnum, ZeroSizedStruct2)
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}
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public func f() -> ZeroSizedStruct {
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ZeroSizedStruct()
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}
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public func g(x: ZeroSizedStruct) {
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}
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// CHECK: class ZeroSizedEnum { } SWIFT_UNAVAILABLE_MSG("'ZeroSizedEnum' is a zero sized value type, it cannot be exposed to C++ yet");
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// CHECK: class ZeroSizedEnum2 { } SWIFT_UNAVAILABLE_MSG("'ZeroSizedEnum2' is a zero sized value type, it cannot be exposed to C++ yet");
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// CHECK: class ZeroSizedEnum3 { } SWIFT_UNAVAILABLE_MSG("'ZeroSizedEnum3' is a zero sized value type, it cannot be exposed to C++ yet");
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// CHECK: class ZeroSizedStruct { } SWIFT_UNAVAILABLE_MSG("'ZeroSizedStruct' is a zero sized value type, it cannot be exposed to C++ yet");
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// CHECK: class ZeroSizedStruct2 { } SWIFT_UNAVAILABLE_MSG("'ZeroSizedStruct2' is a zero sized value type, it cannot be exposed to C++ yet");
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// CHECK: // Unavailable in C++: Swift global function 'f()'.
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// CHECK: // Unavailable in C++: Swift global function 'g(x:)'.
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// CHECK: } // namespace Structs
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