From 28a774fd0953ef19a40946a6ab6c6abc28f79c7e Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Wed, 29 Dec 2021 10:26:02 -0700
Subject: [PATCH] Make code readable by using 'auto'.

---
 include/deal.II/base/parallel.h | 21 ++++++++++-----------
 1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/include/deal.II/base/parallel.h b/include/deal.II/base/parallel.h
index a45bfd8ace..4cf5f035d1 100644
--- a/include/deal.II/base/parallel.h
+++ b/include/deal.II/base/parallel.h
@@ -153,8 +153,9 @@ namespace parallel
     internal::parallel_for(
       SyncIterators(x_begin),
       SyncIterators(x_end),
-      [predicate](const std::tuple<InputIterator, OutputIterator> &p) {
-        *std::get<1>(p) = predicate(*std::get<0>(p));
+      [predicate](const auto &range) {
+        for (const auto &p : range)
+          *std::get<1>(p) = predicate(*std::get<0>(p));
       },
       grainsize);
 #endif
@@ -213,9 +214,9 @@ namespace parallel
     internal::parallel_for(
       SyncIterators(x_begin),
       SyncIterators(x_end),
-      [predicate](
-        const std::tuple<InputIterator1, InputIterator2, OutputIterator> &p) {
-        *std::get<2>(p) = predicate(*std::get<0>(p), *std::get<1>(p));
+      [predicate](const auto &range) {
+        for (const auto &p : range)
+          *std::get<2>(p) = predicate(*std::get<0>(p), *std::get<1>(p));
       },
       grainsize);
 #endif
@@ -279,12 +280,10 @@ namespace parallel
     internal::parallel_for(
       SyncIterators(x_begin),
       SyncIterators(x_end),
-      [predicate](
-        const std::
-          tuple<InputIterator1, InputIterator2, InputIterator3, OutputIterator>
-            &p) {
-        *std::get<3>(p) =
-          predicate(*std::get<0>(p), *std::get<1>(p), *std::get<2>(p));
+      [predicate](const auto &range) {
+        for (const auto &p : range)
+          *std::get<3>(p) =
+            predicate(*std::get<0>(p), *std::get<1>(p), *std::get<2>(p));
       },
       grainsize);
 #endif
-- 
2.39.5