From 72bd933e41a742b0b4b7dcb4c023953a3ce46eae Mon Sep 17 00:00:00 2001
From: Ryan Leckey <ryan@launchbadge.com>
Date: Wed, 8 Apr 2020 01:24:57 -0700
Subject: [PATCH] add MapRow impls; closes #228

---
 sqlx-core/src/row.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/sqlx-core/src/row.rs b/sqlx-core/src/row.rs
index 3e10ecf8..0538fbd7 100644
--- a/sqlx-core/src/row.rs
+++ b/sqlx-core/src/row.rs
@@ -337,6 +337,17 @@ macro_rules! impl_from_row_for_tuples {
 #[allow(unused_macros)]
 macro_rules! impl_map_row_for_row {
     ($DB:ident, $R:ident) => {
+        impl<O: Unpin, F> crate::query::MapRow<$DB> for F
+        where
+            F: for<'c> FnMut($R<'c>) -> O,
+        {
+            type Output = O;
+
+            fn map_row(&mut self, row: $R) -> O {
+                (self)(row)
+            }
+        }
+
         impl<O: Unpin, F> crate::query::TryMapRow<$DB> for F
         where
             F: for<'c> FnMut($R<'c>) -> crate::Result<O>,