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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.
17 lines
652 B
Swift
17 lines
652 B
Swift
// RUN: %empty-directory(%t)
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// RUN: %target-swift-frontend %s -module-name Test -clang-header-expose-decls=all-public -typecheck -verify -emit-clang-header-path %t/empty.h
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// RUN: %FileCheck %s < %t/empty.h
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// RUN: %check-interop-cxx-header-in-clang(%t/empty.h)
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// CHECK: #ifdef SWIFT_SYMBOL
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// CHECK-NEXT: #undef SWIFT_SYMBOL
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// CHECK-NEXT: #endif
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// CHECK-NEXT: #define SWIFT_SYMBOL(usrValue) SWIFT_SYMBOL_MODULE_USR("Test", usrValue)
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// CHECK-LABEL: namespace Test SWIFT_PRIVATE_ATTR SWIFT_SYMBOL_MODULE({{.*}}) {
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// CHECK: } // namespace Test
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// CHECK-EMPTY:
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// CHECK-NEXT: #pragma clang diagnostic pop
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// CHECK-NEXT: #undef SWIFT_SYMBOL
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