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/// Check cross-import overlays with @_implementationOnly imports.
// RUN: %empty-directory(%t)
// RUN: cp -r %S/Inputs/lib-templates/* %t/
// RUN: split-file --leading-lines %s %t
//--- BothPublic.swift
// RUN: %target-swift-emit-module-interface(%t.swiftinterface) %t/BothPublic.swift -enable-cross-import-overlays -I %t/lib/swift -module-name ClientLibrary
// RUN: %target-swift-typecheck-module-from-interface(%t.swiftinterface) -enable-cross-import-overlays -I %t/lib/swift -module-name ClientLibrary
// RUN: %FileCheck %t/BothPublic.swift < %t.swiftinterface
import DeclaringLibrary
import BystandingLibrary
// CHECK: // swift-interface-format-version
// CHECK: // swift-module-flags: {{.*}} -module-name ClientLibrary
// CHECK-DAG: import Swift
// CHECK-DAG: import DeclaringLibrary
// CHECK-DAG: import BystandingLibrary
// CHECK-DAG: import _OverlayLibrary
//--- BothHidden.swift
// RUN: %target-swift-emit-module-interface(%t.swiftinterface) %t/BothHidden.swift -enable-cross-import-overlays -I %t/lib/swift -module-name ClientLibrary
// RUN: %target-swift-typecheck-module-from-interface(%t.swiftinterface) -enable-cross-import-overlays -I %t/lib/swift -module-name ClientLibrary
// RUN: %FileCheck %t/BothHidden.swift < %t.swiftinterface
// RUN: %FileCheck -check-prefix NEGATIVE %t/BothHidden.swift < %t.swiftinterface
@_implementationOnly import DeclaringLibrary
@_implementationOnly import BystandingLibrary
// CHECK: // swift-interface-format-version
// CHECK: // swift-module-flags: {{.*}} -module-name ClientLibrary
// CHECK-DAG: import Swift
// NEGATIVE-NOT: import DeclaringLibrary
// NEGATIVE-NOT: import BystandingLibrary
// NEGATIVE-NOT: import _OverlayLibrary
//--- FirstHidden.swift
// RUN: %target-swift-emit-module-interface(%t.swiftinterface) %t/FirstHidden.swift -enable-cross-import-overlays -I %t/lib/swift -module-name ClientLibrary
// RUN: %target-swift-typecheck-module-from-interface(%t.swiftinterface) -enable-cross-import-overlays -I %t/lib/swift -module-name ClientLibrary
// RUN: %FileCheck %t/FirstHidden.swift < %t.swiftinterface
// RUN: %FileCheck -check-prefix NEGATIVE %t/FirstHidden.swift < %t.swiftinterface
@_implementationOnly import DeclaringLibrary
import BystandingLibrary
// CHECK: // swift-interface-format-version
// CHECK: // swift-module-flags: {{.*}} -module-name ClientLibrary
// CHECK-DAG: import Swift
// CHECK-DAG: import BystandingLibrary
// NEGATIVE-NOT: import DeclaringLibrary
// NEGATIVE-NOT: import _OverlayLibrary
//--- SecondHidden.swift
// RUN: %target-swift-emit-module-interface(%t.swiftinterface) %t/SecondHidden.swift -enable-cross-import-overlays -I %t/lib/swift -module-name ClientLibrary
// RUN: %target-swift-typecheck-module-from-interface(%t.swiftinterface) -enable-cross-import-overlays -I %t/lib/swift -module-name ClientLibrary
// RUN: %FileCheck %t/SecondHidden.swift < %t.swiftinterface
// RUN: %FileCheck -check-prefix NEGATIVE %t/SecondHidden.swift < %t.swiftinterface
import DeclaringLibrary
@_implementationOnly import BystandingLibrary
// CHECK: // swift-interface-format-version
// CHECK: // swift-module-flags: {{.*}} -module-name ClientLibrary
// CHECK-DAG: import Swift
// CHECK-DAG: import DeclaringLibrary
// NEGATIVE-NOT: import BystandingLibrary
// NEGATIVE-NOT: import _OverlayLibrary
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