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60f6afb76c
Eliminates extraneous newlines between top-level Objective-C declarations in `-emit-objc-header` headers. Specifically, there should now always be exactly one—no more, no less—empty line between `@end` and whatever follows it. Besides being more aesthetically pleasing, this eliminates ordering-dependent behavior where PrintAsClang would print an extra newline when visiting an empty extension, which meant that the order in which empty and non-empty extensions were visited during printing could result in whitespace differences in the compiler output. Printing the blank line is now conditional on whether `tell()` indicates that characters were actually written to the output. Fixes rdar://143533893.
127 lines
5.6 KiB
Swift
127 lines
5.6 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: %target-swift-frontend %s -typecheck -clang-header-expose-decls=all-public -emit-clang-header-path %t/empty.h
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// RUN: %FileCheck %s < %t/empty.h
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// CHECK-LABEL: #ifndef EMPTY_SWIFT_H
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// CHECK-NEXT: #define EMPTY_SWIFT_H
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// CHECK-LABEL: #if !defined(__has_include)
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// CHECK-NEXT: # define __has_include(x) 0
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// CHECK-NEXT: #endif
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// CHECK-LABEL: #if !defined(__has_attribute)
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// CHECK-NEXT: # define __has_attribute(x) 0
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// CHECK-NEXT: #endif
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// CHECK-LABEL: #if !defined(__has_feature)
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// CHECK-NEXT: # define __has_feature(x) 0
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// CHECK-NEXT: #endif
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// CHECK-LABEL: #if !defined(__has_warning)
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// CHECK-NEXT: # define __has_warning(x) 0
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// CHECK-NEXT: #endif
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// CHECK-LABEL: #if defined(__OBJC__)
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// CHECK-NEXT: #include <Foundation/Foundation.h>
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// CHECK-NEXT: #endif
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// CHECK-NEXT: #if defined(__cplusplus)
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// CHECK-NEXT: #include <cstdint>
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// CHECK-NEXT: #include <cstddef>
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// CHECK-NEXT: #include <cstdbool>
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// CHECK-NEXT: #include <cstring>
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// CHECK-NEXT: #include <stdlib.h>
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// CHECK-NEXT: #include <new>
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// CHECK-NEXT: #include <type_traits>
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// CHECK-NEXT: #else
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// CHECK-NEXT: #include <stdint.h>
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// CHECK-NEXT: #include <stddef.h>
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// CHECK-NEXT: #include <stdbool.h>
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// CHECK-NEXT: #include <string.h>
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// CHECK-NEXT: #endif
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// CHECK-NEXT: #if defined(__cplusplus)
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// CHECK-NEXT: #pragma clang diagnostic push
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// CHECK-NEXT: #pragma clang diagnostic ignored "-Wnon-modular-include-in-framework-module"
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// CHECK-NEXT: #if defined(__arm64e__) && __has_include(<ptrauth.h>)
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// CHECK-NEXT: # include <ptrauth.h>
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// CHECK-NEXT: #else
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// CHECK-NEXT: #pragma clang diagnostic push
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// CHECK-NEXT: #pragma clang diagnostic ignored "-Wreserved-macro-identifier"
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// CHECK-NEXT: # ifndef __ptrauth_swift_value_witness_function_pointer
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// CHECK-NEXT: # define __ptrauth_swift_value_witness_function_pointer(x)
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// CHECK-NEXT: # endif
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// CHECK-NEXT: # ifndef __ptrauth_swift_class_method_pointer
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// CHECK-NEXT: # define __ptrauth_swift_class_method_pointer(x)
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// CHECK-NEXT: # endif
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// CHECK-NEXT: #pragma clang diagnostic pop
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// CHECK-NEXT: #endif
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// CHECK-NEXT: #pragma clang diagnostic pop
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// CHECK-NEXT: #endif
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// CHECK-LABEL: !defined(SWIFT_TYPEDEFS)
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// CHECK-NEXT: # define SWIFT_TYPEDEFS 1
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// CHECK: typedef float swift_float2 __attribute__((__ext_vector_type__(2)));
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// CHECK-NEXT: typedef float swift_float3 __attribute__((__ext_vector_type__(3)));
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// CHECK-NEXT: typedef float swift_float4 __attribute__((__ext_vector_type__(4)));
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// CHECK-NEXT: typedef double swift_double2 __attribute__((__ext_vector_type__(2)));
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// CHECK-NEXT: typedef double swift_double3 __attribute__((__ext_vector_type__(3)));
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// CHECK-NEXT: typedef double swift_double4 __attribute__((__ext_vector_type__(4)));
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// CHECK-NEXT: typedef int swift_int2 __attribute__((__ext_vector_type__(2)));
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// CHECK-NEXT: typedef int swift_int3 __attribute__((__ext_vector_type__(3)));
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// CHECK-NEXT: typedef int swift_int4 __attribute__((__ext_vector_type__(4)));
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// CHECK-NEXT: typedef unsigned int swift_uint2 __attribute__((__ext_vector_type__(2)));
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// CHECK-NEXT: typedef unsigned int swift_uint3 __attribute__((__ext_vector_type__(3)));
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// CHECK-NEXT: typedef unsigned int swift_uint4 __attribute__((__ext_vector_type__(4)));
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// CHECK: # define SWIFT_METATYPE(X)
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// CHECK: # define SWIFT_CLASS
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// CHECK: # define SWIFT_CLASS_NAMED
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// CHECK: # define SWIFT_PROTOCOL
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// CHECK: # define SWIFT_PROTOCOL_NAMED
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// CHECK: # define SWIFT_EXTENSION(M)
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// CHECK: # define OBJC_DESIGNATED_INITIALIZER
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// CHECK-LABEL: #if defined(__OBJC__)
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// CHECK-NEXT: #if !defined(IBSegueAction)
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// CHECK-NEXT: # define IBSegueAction
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// CHECK-NEXT: #endif
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// CHECK-LABEL: # define SWIFT_CALL __attribute__((swiftcall))
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// CHECK: # define SWIFT_INDIRECT_RESULT __attribute__((swift_indirect_result))
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// CHECK: # define SWIFT_CONTEXT __attribute__((swift_context))
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// CHECK: # define SWIFT_ERROR_RESULT __attribute__((swift_error_result))
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// CHECK-LABEL: #if defined(__OBJC__)
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// CHECK-NEXT: #if __has_feature(objc_modules)
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// CHECK-LABEL: #if defined(__OBJC__)
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// CHECK-EMPTY:
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// CHECK-NEXT: #endif
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// CHECK-NEXT: #if __has_attribute(external_source_symbol)
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// CHECK-NEXT: # pragma clang attribute pop
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// CHECK-NEXT: #endif
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// CHECK-NEXT: #if defined(__cplusplus)
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// CHECK-NEXT: #pragma clang diagnostic push
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// CHECK-NEXT: #pragma clang diagnostic ignored "-Wnon-modular-include-in-framework-module"
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// CHECK-NEXT: // Allow user to find the header using additional include paths
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// CHECK-NEXT: #if __has_include(<swiftToCxx/_SwiftCxxInteroperability.h>)
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// CHECK-NEXT: #include <swiftToCxx/_SwiftCxxInteroperability.h>
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// CHECK-NEXT: // Look for the C++ interop support header relative to clang's resource dir:
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// CHECK-NEXT: // '<toolchain>/usr/lib/clang/<version>/include/../../../swift/swiftToCxx'.
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// CHECK-NEXT: #elif __has_include(<../../../swift/swiftToCxx/_SwiftCxxInteroperability.h>)
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// CHECK-NEXT: #include <../../../swift/swiftToCxx/_SwiftCxxInteroperability.h>
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// CHECK-NEXT: #elif __has_include(<../../../../../lib/swift/swiftToCxx/_SwiftCxxInteroperability.h>)
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// CHECK-NEXT: // '<toolchain>/usr/local/lib/clang/<version>/include/../../../../../lib/swift/swiftToCxx'.
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// CHECK-NEXT: #include <../../../../../lib/swift/swiftToCxx/_SwiftCxxInteroperability.h>
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// CHECK-NEXT: #endif
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// CHECK-NEXT: #pragma clang diagnostic pop
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// CHECK-NEXT: #if __has_feature(objc_modules)
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// CHECK: #ifndef SWIFT_PRINTED_CORE
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// CHECK: } // namespace swift
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// CHECK-EMPTY:
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// CHECK-NEXT: #endif
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// CHECK: namespace empty SWIFT_PRIVATE_ATTR SWIFT_SYMBOL_MODULE("empty") {
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// CHECK: } // namespace empty
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// CHECK: #endif
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// CHECK-NOT: @
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