Code review by @djbe

2019-01-30 15:25:11 +09:00
parent ebb7ece511
commit 782ffdd4c7
2 changed files with 11 additions and 9 deletions
--- a/Sources/_SwiftSupport.swift
+++ b/Sources/_SwiftSupport.swift
@@ -36,3 +36,11 @@ public extension Variable {
  }
 }
 #endif
+
+#if !swift(>=4.2)
+extension ArraySlice where Element: Equatable {
+    func firstIndex(of element: Element) -> Int? {
+        return index(of: element)
+    }
+}
+#endif