Merge pull request #184 from cetineremre/patch-2

add swift version check for compactmap
rechsteiner · May 1, 2018 · 83d7464 · 83d7464
2 parents 30e8d25 + eed4001
commit 83d7464
Showing 1 changed file with 9 additions and 3 deletions.
diff --git a/Parchment/Classes/PagingViewController.swift b/Parchment/Classes/PagingViewController.swift
@@ -543,9 +543,15 @@ open class PagingViewController<T: PagingItem>:
 
   private func generateItemsForIndexedDataSource() -> [T] {
     let numberOfItems = dataSource?.numberOfViewControllers(in: self) ?? 0
-    return (0..<numberOfItems).enumerated().compactMap{
-      dataSource?.pagingViewController(self, pagingItemForIndex: $0.offset)
-    }
+    #if swift(>=4.1)
+      return (0..<numberOfItems).enumerated().compactMap{
+        dataSource?.pagingViewController(self, pagingItemForIndex: $0.offset)
+      }
+    #else
+      return (0..<numberOfItems).enumerated().flatMap{
+        dataSource?.pagingViewController(self, pagingItemForIndex: $0.offset)
+      }
+    #endif
   }
 
   private func configureDataSource() {