| // RUN: %target-run-simple-swift | %FileCheck %s |
| // REQUIRES: executable_test |
| |
| func fib() { |
| var (a, b) = (0, 1) |
| while b < 10 { |
| print(b) |
| (a, b) = (b, a+b) |
| } |
| } |
| fib() |
| |
| // CHECK: 1 |
| // CHECK: 1 |
| // CHECK: 2 |
| // CHECK: 3 |
| // CHECK: 5 |
| // CHECK: 8 |
| |
| // From: <rdar://problem/17796401> |
| // FIXME: <rdar://problem/21993692> type checker too slow |
| let two_oneA = [1, 2, 3, 4].lazy.reversed() |
| let two_one = Array(two_oneA.filter { $0 % 2 == 0 }.map { $0 / 2 }) |
| print(two_one) |
| // CHECK: [2, 1] |
| |
| // rdar://problem/18208283 |
| func flatten<Element, Seq: Sequence, InnerSequence: Sequence> (_ outerSequence: Seq) -> [Element] |
| where Seq.Iterator.Element == InnerSequence, InnerSequence.Iterator.Element == Element { |
| var result = [Element]() |
| |
| for innerSequence in outerSequence { |
| result.append(contentsOf: innerSequence) |
| } |
| |
| return result |
| } |
| |
| // CHECK: [1, 2, 3, 4, 5, 6] |
| let flat = flatten([[1,2,3], [4,5,6]]) |
| print(flat) |
| |
| // rdar://problem/19416848 |
| func observe<T:Sequence, V>(_ g:T) where V == T.Iterator.Element { } |
| observe(["a":1]) |