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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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12
test/stdlib/Unicode.swift
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@@ -2502,8 +2502,7 @@ StringCookedViews.test("UTF16") {
StringCookedViews.test("UnicodeScalars") {
for test in UTF8TestsSmokeTest {
let expectedScalars: [UnicodeScalar] =
Array(map(test.scalars) { UnicodeScalar($0) })
let expectedScalars = lazy(test.scalars).map { UnicodeScalar($0) }.array
let subject: String = NonContiguousNSString(test.scalars)
checkSliceableWithBidirectionalIndex(expectedScalars,
subject.unicodeScalars, test.loc.withCurrentLoc())
@@ -2511,9 +2510,9 @@ StringCookedViews.test("UnicodeScalars") {
forStringsWithUnpairedSurrogates {
(test: UTF16Test, subject: String) -> () in
let expectedScalars: [UnicodeScalar] =
Array(map(test.scalarsHead + test.scalarsRepairedTail) {
UnicodeScalar($0) })
let expectedScalars = lazy(
test.scalarsHead + test.scalarsRepairedTail
).map { UnicodeScalar($0) }.array
checkSliceableWithBidirectionalIndex(expectedScalars,
subject.unicodeScalars, test.loc.withCurrentLoc())
}
@@ -2529,8 +2528,7 @@ StringTests.test("StreamableConformance") {
(test: UTF16Test, subject: String) -> () in
let expected = test.scalarsHead + test.scalarsRepairedTail
let printedSubject = toString(subject)
let actual: [UInt32] =
Array(map(printedSubject.unicodeScalars) { $0.value })
let actual = lazy(printedSubject.unicodeScalars).map { $0.value }.array
expectEqual(expected, actual)
}
}