arrays.swift

// RUN: %empty-directory(%t)
// RUN: %target-swift-frontend -enable-experimental-feature Extern %s -enable-experimental-feature Embedded -c -o %t/main.o
// RUN: %target-clang -x c -c %S/Inputs/print.c -o %t/print.o
// RUN: %target-clang %t/main.o %t/print.o -o %t/a.out -dead_strip
// RUN: %target-run %t/a.out | %FileCheck %s

// REQUIRES: swift_in_compiler
// REQUIRES: executable_test
// REQUIRES: optimized_stdlib
// REQUIRES: OS=macosx || OS=linux-gnu
// REQUIRES: swift_feature_Embedded
// REQUIRES: swift_feature_Extern

@_extern(c,"putchar")
@discardableResult
func putchar(_:CInt)-> CInt

public func print(_ s:StaticString, terminator:StaticString="\n") {
 var p = s.utf8Start
 while p.pointee != 0 {
 putchar(CInt(p.pointee))
 p += 1
 }
 p = terminator.utf8Start
 while p.pointee != 0 {
 putchar(CInt(p.pointee))
 p += 1
 }
}

@_silgen_name("print_long")
func print_long(_: Int)

public func print(_ n: Int, terminator: StaticString = "\n") {
 print_long(n)
 print("", terminator: terminator)
}

func print(_ array: [Int]) {
 print("[", terminator: "")
 for i in 0 ..< array.count {
 print_long(array[i])
 if i != array.count - 1 { print(",", terminator: "") }
 }
 print("]")
}

func isArray<S: Sequence>(_ s: S) -> Bool where S.Element == Int {
 return s is [Int]
}

public func testIsArray() -> Bool {
 return isArray(Array<Int>())
}

public func testIsNotArray() -> Bool {
 return isArray(Array<Int>().lazy)
}

func test() {
 var a = [1, 2, 3]
 a.append(8)
 a.append(contentsOf: [5, 4])
 let b = a.sorted()
 var c = b
 c = c.reversed().filter { $0 % 2 == 0 }
 print(c) // CHECK: [8, 4, 2]

 // CHECK: yes
 print(testIsArray() ? "yes":"no")
 // CHECK: no
print(testIsNotArray()?"yes":"no")
}

test()