Follow up for swiftlang#278 : make the required function from FoundationEssentials package so we can use it from FoundationI18n (swiftlang#286)

* Follow up for swiftlang#278 : make the required function from FoundationEssentials `package` so we can use it from FoundationI18n

* Workaround TAPI error by removing the default arguments

Author: itingliu

Sources/FoundationEssentials/String/BidirectionalCollection.swift

@@ -74,7 +74,7 @@ extension BidirectionalCollection {
         return idx
     }
 
-    func _range<S: BidirectionalCollection>(of other: S, anchored: Bool = false, backwards: Bool = false) -> Range<Index>? where S.Element == Element, Element : Equatable {
+    package func _range<S: BidirectionalCollection>(of other: S, anchored: Bool, backwards: Bool) -> Range<Index>? where S.Element == Element, Element : Equatable {
         var result: Range<Index>? = nil
         var fromLoc: Index
         var toLoc: Index

Sources/FoundationEssentials/TimeZone/TimeZone_Cache.swift

@@ -174,7 +174,7 @@ struct TimeZoneCache : Sendable {
 #else
                     let lookFor = TimeZone.TZDIR + "/"
 #endif
-                    if let rangeOfZoneInfo = file._range(of: lookFor) {
+                    if let rangeOfZoneInfo = file._range(of: lookFor, anchored: false, backwards: false) {
                         let name = file[rangeOfZoneInfo.upperBound...]
                         if let result = fixed(String(name)) {
                             return TimeZone(inner: result)

Sources/FoundationInternationalization/Formatting/Duration+UnitsFormatStyle.swift

@@ -252,7 +252,7 @@ extension Duration {
             let formattedFields = _formatFields(duration)
             var result = _getFullListPattern(length: formattedFields.count)
             for formattedField in formattedFields.reversed() {
-                let range = result._range(of: "{0}", backwards: true)!
+                let range = result._range(of: "{0}", anchored: false, backwards: true)!
                 result.replaceSubrange(range, with: formattedField)
             }
             return result

Tests/FoundationInternationalizationTests/Formatting/DateFormatStyleTests.swift

@@ -1120,7 +1120,7 @@ final class MatchConsumerAndSearcherTests : XCTestCase {
     // Disabled in package because _range is imported twice, once from Essentials, once from Internationalization
     func testMatchPartialRangesFromBeginning() {
         func verify(_ string: String, matches format: Date.FormatString, expectedMatch: String, expectedDate: TimeInterval, file: StaticString = #file, line: UInt = #line) {
-            let occurrenceRange = string._range(of: expectedMatch)!
+            let occurrenceRange = string._range(of: expectedMatch, anchored: false, backwards: false)!
             _verifyString(string, matches: format, start: string.startIndex, in: string.startIndex..<string.endIndex, expectedUpperBound: occurrenceRange.upperBound, expectedDate: Date(timeIntervalSinceReferenceDate: expectedDate), file: file, line: line)
         }