// RUN: %target-typecheck-verify-swift %clang-importer-sdk

import ctypes

func checkRawRepresentable<T: RawRepresentable>(_: T) {}
func checkEquatable<T: Equatable>(_: T) -> Bool {}
func checkEquatablePattern(_ c: Color) {
  switch c {
    case red: return
    case green: return
    case blue: return
    default: return
  }
}

func testColor() {
  var c: Color = red
  c = blue
  _ = c.rawValue
  checkRawRepresentable(c)
  _ = checkEquatable(c)
  checkEquatablePattern(c)
}

func testTribool() {
  var b = Indeterminate
  b = True
  _ = b.rawValue
}

func verifyIsInt(_: inout Int) { }
func verifyIsUInt(_: inout UInt) { }
func verifyIsUInt64(_: inout UInt64) { }

func testAnonEnum() {
  var a = AnonConst1
  a = AnonConst2
#if os(Windows)
  verifyIsInt(&a)
#elseif arch(i386) || arch(arm)
  verifyIsUInt64(&a)
#elseif arch(x86_64) || arch(arm64) || arch(powerpc64) || arch(powerpc64le) || arch(s390x)
  verifyIsUInt(&a)
#endif
}

func testAnonEnumSmall() {
  var a = AnonConstSmall1
  a = AnonConstSmall2
  _ = a as Int
}

func testPoint() -> Float {
  var p: Point
  p.x = 1.0
  return p.y
}

func testAnonStructs() {
  var a_s: AnonStructs
  a_s.a = 5
  a_s.b = 3.14
  a_s.c = 7.5
}

func testUnnamedStructs() {
  var u_s: UnnamedStructs
  u_s.x.a = 1
  u_s.x.b = 3.14
  u_s.x.c = "error" // expected-error{{value of type 'UnnamedStructs.__Unnamed_struct_x' has no member 'c'}}
  u_s.y.a = 3.14
  u_s.y.b = 2
  u_s.y.c = "error" // expected-error{{value of type 'UnnamedStructs.__Unnamed_struct_y' has no member 'c'}}
  u_s.y.z.c = 3
  u_s.y.z.d = "error" // expected-error{{value of type 'UnnamedStructs.__Unnamed_struct_y.__Unnamed_struct_z' has no member 'd'}}

  let _ = u_s.x
  let _: UnnamedStructs.__Unnamed_struct_x = u_s.x
}

// FIXME: Import pointers to opaque types as unique types.

func testPointers() {
  _ = HWND(bitPattern: 0)
}

// Ensure that imported structs can be extended, even if typedef'ed on the C
// side.

func sqrt(_ x: Float) -> Float {}
func atan2(_ x: Float, _ y: Float) -> Float {}

extension Point {
  func asPolar() -> (rho: Float, theta: Float) {
    return (sqrt(x*x + y*y), atan2(x, y))
  }
}

extension AnonStructs {
  func frob() -> Double {
    return Double(a) + Double(b) + c
  }
}

func testFuncStructDisambiguation() {
  let a : funcOrStruct
  var i = funcOrStruct()
  i = 5
  _ = i
  var a2 = funcOrStruct(i: 5)
  a2 = a
  _ = a2
}

func testVoid() {
  var x: MyVoid // expected-error{{use of undeclared type 'MyVoid'}}
  returnsMyVoid()
}

var word: Int = 0
var uword: UInt = 0

func testImportStdintTypes() {
  var t9_unqual : Int = intptr_t_test
  var t10_unqual : UInt = uintptr_t_test
  t9_unqual = word
  t10_unqual = uword
  _ = t9_unqual
  _ = t10_unqual

  var t9_qual : intptr_t = 0 // no-warning
  var t10_qual : uintptr_t = 0 // no-warning
  t9_qual = word
  t10_qual = uword
  _ = t9_qual
  _ = t10_qual
}

func testImportStddefTypes() {
  let t1_unqual: Int = ptrdiff_t_test
  let t2_unqual: Int = size_t_test
  let t3_unqual: Int = rsize_t_test

  _ = t1_unqual as ctypes.ptrdiff_t
  _ = t2_unqual as ctypes.size_t
  _ = t3_unqual as ctypes.rsize_t
}

func testImportSysTypesTypes() {
  let t1_unqual: Int = ssize_t_test
  _ = t1_unqual as ctypes.ssize_t
}

func testImportOSTypesTypes() {
  var t1_unqual: CInt = SInt_test
  var t2_unqual: CUnsignedInt = UInt_test

  var t1_qual: ctypes.SInt = t1_unqual // expected-error {{no type named 'SInt' in module 'ctypes'}}
  var t2_qual: ctypes.UInt = t2_unqual // expected-error {{no type named 'UInt' in module 'ctypes'}}
}

func testImportTagDeclsAndTypedefs() {
  var t1 = FooStruct1(x: 0, y: 0.0)
  t1.x = 0
  t1.y = 0.0

  var t2 = FooStruct2(x: 0, y: 0.0)
  t2.x = 0
  t2.y = 0.0

  var t3 = FooStruct3(x: 0, y: 0.0)
  t3.x = 0
  t3.y = 0.0

  var t4 = FooStruct4(x: 0, y: 0.0)
  t4.x = 0
  t4.y = 0.0

  var t5 = FooStruct5(x: 0, y: 0.0)
  t5.x = 0
  t5.y = 0.0

  var t6 = FooStruct6(x: 0, y: 0.0)
  t6.x = 0
  t6.y = 0.0
}


func testNoReturnStuff() {
  couldReturnFunction()  // not dead
  couldReturnFunction()  // not dead
  noreturnFunction()

  couldReturnFunction()  // dead
}

func testFunctionPointers() {
  let fp = getFunctionPointer()
  useFunctionPointer(fp)

  _ = fp as (@convention(c) (CInt) -> CInt)?

  let wrapper: FunctionPointerWrapper = FunctionPointerWrapper(a: nil, b: nil)
  _ = FunctionPointerWrapper(a: fp, b: fp)
  useFunctionPointer(wrapper.a)
  _ = wrapper.b as (@convention(c) (CInt) -> CInt)

  var anotherFP: @convention(c) (CInt, CLong, UnsafeMutableRawPointer?) -> Void
    = getFunctionPointer2()

  useFunctionPointer2(anotherFP)
  anotherFP = fp // expected-error {{cannot assign value of type 'fptr?' (aka 'Optional<@convention(c) (Int32) -> Int32>') to type '@convention(c) (CInt, CLong, UnsafeMutableRawPointer?) -> Void' (aka '@convention(c) (Int32, Int, Optional<UnsafeMutableRawPointer>) -> ()')}}
}

func testStructDefaultInit() {
  let _ = AnonStructs()
  let _ = ModRM()
  let _ = AnonUnion()
  let _ = GLKVector4()
}

func testArrays() {
  nonnullArrayParameters([], [], [])
  nonnullArrayParameters(nil, [], []) // expected-error {{'nil' is not compatible with expected argument type 'UnsafePointer<Int8>'}}
  nonnullArrayParameters([], nil, []) // expected-error {{'nil' is not compatible with expected argument type 'UnsafePointer<UnsafeMutableRawPointer?>'}}
  nonnullArrayParameters([], [], nil) // expected-error {{'nil' is not compatible with expected argument type 'UnsafePointer<Int32>'}}

  nullableArrayParameters([], [], [])
  nullableArrayParameters(nil, nil, nil)

  // It would also be nice to warn here about the arrays being too short, but
  // that's probably beyond us for a while.
  staticBoundsArray([])
  staticBoundsArray(nil) // expected-error {{'nil' is not compatible with expected argument type 'UnsafePointer<Int8>'}}
}

func testVaList() {
  withVaList([]) {
    hasVaList($0) // okay
  }
  hasVaList(nil) // expected-error {{'nil' is not compatible with expected argument type 'CVaListPointer'}}
}

func testNestedForwardDeclaredStructs() {
  // Check that we still have a memberwise initializer despite the forward-
  // declared nested type. rdar://problem/30449400
  _ = StructWithForwardDeclaredStruct(ptr: nil)
}

typealias IntTuple4096 = (Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, 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Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, Int8, 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func testBigArrayInStruct(_ maxSize: IntTuple4096) {
  var structWithBigArray = StructWithBigArray()
  structWithBigArray.max_size = maxSize
  structWithBigArray.max_size_plus_one // expected-error {{value of type 'StructWithBigArray' has no member 'max_size_plus_one'}}
}