Move SQLRow to a separate file

Author: kean

Sources/SwiftSQL/SQLRow.swift

@@ -0,0 +1,33 @@
+// The MIT License (MIT)
+//
+// Copyright (c) 2020 Alexander Grebenyuk (github.com/kean).
+
+import Foundation
+import SQLite3
+
+/// Represents a single row returned by the SQL statement.
+public struct SQLRow {
+    let statement: SQLStatement // Storing as strong reference doesn't seem to affect performance
+    var ref: OpaquePointer { statement.ref }
+
+    #warning("TODO: document")
+    public subscript<T: SQLDataType>(index: Int) -> T {
+        T.sqlColumn(statement: ref, index: Int32(index))
+    }
+
+    public subscript<T: SQLDataType>(index: Int) -> T? {
+        if sqlite3_column_type(ref, Int32(index)) == SQLITE_NULL {
+            return nil
+        } else {
+            return T.sqlColumn(statement: ref, index: Int32(index))
+        }
+    }
+
+    public subscript<T: SQLDataType>(name: String) -> T {
+        fatalError()
+    }
+
+    public subscript<T: SQLDataType>(name: String) -> T? {
+        fatalError()
+    }
+}

Sources/SwiftSQL/SQLStatement.swift

@@ -221,31 +221,3 @@ public final class SQLStatement {
         throw error
     }
 }
-
-#warning("TODO: is retaining statement fine in terms of performance?")
-public struct SQLRow {
-    let statement: SQLStatement // Storing as strong reference doesn't seem to affect performance
-    var ref: OpaquePointer { statement.ref }
-
-    #warning("TODO: document")
-    #warning("TODO: add null checks")
-    public subscript<T: SQLDataType>(index: Int) -> T {
-        T.sqlColumn(statement: ref, index: Int32(index))
-    }
-
-    public subscript<T: SQLDataType>(index: Int) -> T? {
-        if sqlite3_column_type(ref, Int32(index)) == SQLITE_NULL {
-            return nil
-        } else {
-            return T.sqlColumn(statement: ref, index: Int32(index))
-        }
-    }
-
-    public subscript<T: SQLDataType>(name: String) -> T {
-        fatalError()
-    }
-
-    public subscript<T: SQLDataType>(name: String) -> T? {
-        fatalError()
-    }
-}