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

// REQUIRES: objc_interop

import Foundation
import CoreGraphics

var roomName : String? = nil

if let realRoomName = roomName as! NSString { // expected-error {{initializer for conditional binding must have Optional type, not 'NSString'}} expected-warning {{cast from 'String?' to unrelated type 'NSString' always fails}}
			
}

var pi = 3.14159265358979
var d: CGFloat = 2.0
var dpi:CGFloat = d*pi // expected-error{{binary operator '*' cannot be applied to operands of type 'CGFloat' and 'Double'}}

let ff: CGFloat = floorf(20.0) // expected-error{{'Float' is not convertible to 'CGFloat'}}

let total = 15.0
let count = 7
let median = total / count // expected-error {{binary operator '/' cannot be applied to operands of type 'Double' and 'Int'}} expected-note {{overloads for '/' exist with these partially matching parameter lists: (Int, Int), (Double, Double)}}

if (1) {} // expected-error{{'Int' is not convertible to 'BooleanType'}}
var a: [String] = [1] // expected-error{{'[Int]' is not convertible to '[String]'}}
var b: Int = [1, 2, 3] // expected-error{{'[Int]' is not convertible to 'Int'}}

var f1: Float = 2.0
var f2: Float = 3.0

var dd: Double = f1 - f2 // expected-error{{'Float' is not convertible to 'Double'}}

func f() -> Bool {
  return 1 + 1 // expected-error{{'Int' is not convertible to 'Bool'}}
}

// Test that nested diagnostics are properly surfaced.
func takesInt(i: Int) {}
func noParams() -> Int { return 0 }
func takesAndReturnsInt(i: Int) -> Int { return 0 }

takesInt(noParams(1)) // expected-error{{cannot invoke 'noParams' with an argument list of type '(Int)'}}
takesInt(takesAndReturnsInt("")) // expected-error{{cannot invoke 'takesAndReturnsInt' with an argument list of type '(String)'}} expected-note{{expected an argument list of type '(Int)'}}

// Test error recovery for type expressions.
class A {
    var a: Array<Int>
    init() {
        a = Array<Int // expected-error{{argument for generic parameter 'T' could not be inferred}} 
        // expected-error@-1 5{{expected member name or constructor call after type name}}
        // expected-note@-2 5{{add arguments after the type to construct a value of the type}}
        // expected-note@-3 5{{use '.self' to reference the type object}}
    }
}

func retV() { return true } // expected-error {{unexpected non-void return value in void function}}