Remove .countPrefix(while:) extension

CotEditor/Sources/Collection.swift

@@ -185,21 +185,3 @@ extension MutableCollection where Self: RandomAccessCollection {
         self.sort { $0[keyPath: keyPath] < $1[keyPath: keyPath] }
     }
 }
-
-
-
-// MARK: - Count
-
-extension Sequence {
-
-    /// Counts up elements by enumerating collection until encountering the element that doesn't satisfy the given predicate.
-    ///
-    /// - Parameters:
-    ///    - predicate: A closure that takes an element of the sequence as its argument
-    ///                 and returns a Boolean value indicating whether the element should be counted.
-    /// - Returns: The number of elements that satisfies the given predicate and are sequentially from the first index.
-    func countPrefix(while predicate: (Element) throws -> Bool) rethrows -> Int {
-
-        try self.prefix(while: predicate).count
-    }
-}

CotEditor/Sources/URL.swift

@@ -53,7 +53,7 @@ extension URL {
         let pathComponents = self.pathComponents.dropLast()
         let basePathComponents = baseURL.pathComponents.dropLast(baseURL.hasDirectoryPath ? 0 : 1)
 
-        let sameCount = zip(basePathComponents, pathComponents).countPrefix { $0.0 == $0.1 }
+        let sameCount = zip(basePathComponents, pathComponents).prefix(while: { $0.0 == $0.1 }).count
         let parentCount = basePathComponents.count - sameCount
         let parentComponents = [String](repeating: "..", count: parentCount)
         let diffComponents = pathComponents[sameCount...]

Tests/CollectionTests.swift

@@ -47,14 +47,6 @@ struct CollectionTests {
     }
 
 
-    @Test func countPrefix() {
-
-        #expect([1, 2, 0, -1, 3].countPrefix(while: { $0 > 0 }) == 2)
-        #expect([0, 1, 2, 0, -1].countPrefix(while: { $0 > 0 }) == 0)
-        #expect([1, 2, 3, 4, 5].countPrefix(while: { $0 > 0 }) == 5)
-    }
-
-
     @Test func mapKeys() {
 
         let dict = [1: 1, 2: 2, 3: 3]