File: RangeReplaceableFilterCompatibility.swift

package info (click to toggle)
swiftlang 6.1.3-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,532 kB
  • sloc: cpp: 9,901,743; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (41 lines) | stat: -rw-r--r-- 1,191 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
// RUN: %empty-directory(%t)
// RUN: %target-build-swift %s -o %t/a.out4 -swift-version 4 && %target-codesign %t/a.out4 && %target-run %t/a.out4

// REQUIRES: executable_test

import StdlibUnittest

var tests = TestSuite("RangeReplaceableFilterCompatibility")

tests.test("String.filter return type") {
  var filtered = "Hello, World".filter { $0 < "A" }
  expectType(String.self, &filtered)
}

tests.test("Array.filter return type") {
  var filtered = Array(0..<10).filter { $0 % 2 == 0 }
  expectType([Int].self, &filtered)
}

tests.test("ContiguousArray.filter return type") {
  var filtered = ContiguousArray(0..<10).filter { $0 % 2 == 0 }
  expectType([Int].self, &filtered)
}

tests.test("ArraySlice.filter return type") {
  var filtered = Array(0..<10)[0..<10].filter { $0 % 2 == 0 }
  expectType([Int].self, &filtered)
}

tests.test("String.filter can return [Character]") {
  let filtered = "Hello, World".filter { "A" <= $0 && $0 <= "Z"} as [Character]
  expectEqualSequence("HW", filtered)
}

tests.test("lazy.flatMap.filter ambiguity") {
  // this expression should compile without ambiguity
  _ = Array(0..<10).lazy.flatMap { .some($0) }.filter { _ in false }
}

runAllTests()