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[stdlib] Introduce lazy() and use it for mapping

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Swift SVN r19312
This commit is contained in:
Dave Abrahams
2014-06-28 00:35:43 +00:00
parent cda8ee64fe
commit a7f6b97222
13 changed files with 163 additions and 40 deletions
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13
test/stdlib/NSStringAPI.swift
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@@ -407,15 +407,15 @@ NSStringAPIs.test("fastestEncoding") {
NSStringAPIs.test("fileSystemRepresentation()") {
if true {
let expectedStr: [CChar] = Array(map("abc\0".utf8) { $0.asSigned() })
let expectedStr = lazy("abc\0".utf8).map { $0.asSigned() }.array
expectEqual(expectedStr, "abc".fileSystemRepresentation())
}
// On OSX file system representation is Unicode NFD.
// This test might need to be adjusted for other systems.
if true {
let expectedStr: [CChar] =
Array(map("\u305f\u3099くてん\0".utf8) { $0.asSigned() })
let expectedStr =
lazy("\u305f\u3099くてん\0".utf8).map { $0.asSigned() }.array
expectEqual(expectedStr, "だくてん".fileSystemRepresentation())
}
}
@@ -518,7 +518,7 @@ NSStringAPIs.test("getCString(_:maxLength:encoding:)") {
}
if true {
let bufferLength = 17
var expectedStr: [CChar] = Array(map("abc あかさた\0".utf8) { $0.asSigned() })
var expectedStr = lazy("abc あかさた\0".utf8).map { $0.asSigned() }.array
while (expectedStr.count != bufferLength) {
expectedStr += (0xff).asSigned()
}
@@ -549,8 +549,9 @@ NSStringAPIs.test("getFileSystemRepresentation(_:maxLength:)") {
}
if true {
let bufferLength = 100
var expectedStr: [CChar] =
Array(map("abc \u305f\u3099くてん\0".utf8) { $0.asSigned() })
var expectedStr = lazy(
"abc \u305f\u3099くてん\0".utf8
).map { $0.asSigned() }.array
while (expectedStr.count != bufferLength) {
expectedStr += (0xff).asSigned()
}