complex_expressions.swift

// RUN: %target-typecheck-verify-swift

// https://github.com/apple/swift/issues/43450
// Expression in 'test_seconds' was too complex to be solved in reasonable time

struct Nano : CustomStringConvertible {
  var value: Int64 = 0
  init(_ x: Int64) { self.value = x }
  var description: String { return "\(self.value)" }
}

func *(lhs: Nano, rhs: Int) -> Nano { return Nano(lhs.value * Int64(rhs)); }
func *(lhs: Int, rhs: Nano) -> Nano { return Nano(Int64(lhs) * rhs.value); }
func +(lhs: Nano, rhs: String) -> String { return lhs.description + rhs; }
func +(lhs: String, rhs: Nano) -> String { return lhs + rhs.description; }
func +(lhs: Nano, rhs: Nano) -> Nano { return Nano(lhs.value + rhs.value); }

let u_nano = Nano(1)
let u_second = Nano(1_000_000_00)
let u_minute = u_second * 60

extension Int {
  var ns: Nano { return Nano(Int64(self)) }
  var s: Nano { return self * u_second }
  var i: Nano { return self * u_minute }
}

func test_seconds() {
  print("Testing second operations:\n")
  print(u_minute + u_second + Nano(500) + " = " + 1.i + 1.s + 500.ns)
  print((u_minute + u_second + Nano(500)) + " = " + (1.i + 1.s + 500.ns))
}

// https://github.com/apple/swift/issues/44710:
// 'DictionaryExpr' was too complex to be solved in reasonable time

let M_PI: Double = 3.1415926535897931
let M_E : Double = 2.7182818284590451

func sqrt(degrees: Int) -> Double {
  return 0
}

func sqrt(degrees: Float) -> Double {
  return 0
}

func sqrt(degrees: Double) -> Double {
  return 0
}

enum Operation {
  case constant(Double)
  case unaryOperation((Double) -> Double)
  case binaryOperation((Double, Double) -> Double)
  case equals
}

var operations: Dictionary<String, Operation> = [
  "π": .constant(M_PI),
  "e": .constant(M_E),
  "√": .unaryOperation(sqrt),
  "×": .binaryOperation({ (op1: Double, op2: Double) in
    return op1 * op2
  }),
  "÷": .binaryOperation({ (op1, op2) in
    return op1 / op2
  }),
  "+": .binaryOperation({ (op1: Double, op2: Double) in
    return op1 + op2
  }),
  "−": .binaryOperation({ (op1, op2) in
    return op1 - op2
  }),
  "=": .equals,
]

// https://github.com/apple/swift/issues/44403
do {
  struct P {
    let x: Float
    let y: Float
  }

  func f(pt: P, p0: P, p1: P) -> Bool {
    return (pt.x - p0.x) * (p1.y - p0.y) - (pt.y - p0.y) * (p1.x - p0.x) < 0.0
  }
}

// Tests for partial contextual type application in sub-expressions

let v1 = (1 - 2 / 3 * 6) as UInt
let v2 = (([1 + 2 * 3, 4, 5])) as [UInt]
let v3 = ["hello": 1 + 2, "world": 3 + 4 + 5 * 3] as Dictionary<String, UInt>
let v4 = [1 + 2 + 3, 4] as [UInt32] + [2 * 3] as [UInt32]
let v5 = ([1 + 2 + 3, 4] as [UInt32]) + ([2 * 3] as [UInt32])
let v6 = [1 + 2 + 3, 4] as Set<UInt32>
let v7: [UInt32] = [55 * 8, 0]

// https://github.com/apple/swift/issues/46253
// "Expression was too complex" errors for short dictionary literals
// of simple closure expressions

let _: Dictionary<Int, (Int, Int) -> Bool> =
  [  0: { $0 == $1 },  1: { $0 == $1 },  2: { $0 == $1 },  3: { $0 == $1 },
     4: { $0 == $1 },  5: { $0 == $1 },  6: { $0 == $1 },  7: { $0 == $1 },
     8: { $0 == $1 },  9: { $0 == $1 }, 10: { $0 == $1 }, 11: { $0 == $1 },
    12: { $0 == $1 }, 13: { $0 == $1 }, 14: { $0 == $1 }, 15: { $0 == $1 },
    16: { $0 == $1 }, 17: { $0 == $1 }, 18: { $0 == $1 }, 19: { $0 == $1 } ]

let _: [Int: (Int, Int) -> Bool] =
  [  0: { $0 != $1 },  1: { $0 != $1 },  2: { $0 != $1 },  3: { $0 != $1 },
     4: { $0 != $1 },  5: { $0 != $1 },  6: { $0 != $1 },  7: { $0 != $1 },
     8: { $0 != $1 },  9: { $0 != $1 }, 10: { $0 != $1 }, 11: { $0 != $1 },
    12: { $0 != $1 }, 13: { $0 != $1 }, 14: { $0 != $1 }, 15: { $0 != $1 },
    16: { $0 != $1 }, 17: { $0 != $1 }, 18: { $0 != $1 }, 19: { $0 != $1 } ]

// rdar://problem/32034560 - type-checker hangs trying to solve expression
struct R32034560 {
  private var R32034560: Array<Array<UInt32>>
  private func foo(x: UInt32) -> UInt32 {
    return ((self.R32034560[0][Int(x >> 24) & 0xFF] &+ self.R32034560[1][Int(x >> 16) & 0xFF]) ^ self.R32034560[2][Int(x >> 8) & 0xFF]) &+ self.R32034560[3][Int(x & 0xFF)]
  }
}

// rdar://problem/33806601

class P_33806601 {
    var x : Int = 0
    var y : Int = 1
}

func foo33806601<T>(_ n: T) -> T where T : FloatingPoint { fatalError() }
func foo33806601(_ n: Double) -> Double { return 0.0 }

let _: (P_33806601, P_33806601) -> Double = {
  (p : P_33806601, s : P_33806601)  -> Double in
    foo33806601(Double((p.x - s.x) * (p.x - s.x) + (p.y - s.y) * (p.y - s.y)))
}