[gcc(refs/users/ppalka/heads/libstdcxx-constrained-algos)] Preincrement iterators instead of postincrementing where possible

[Patrick Palka]

https://gcc.gnu.org/g:b3f799c0d450927bdf35798fcb70c4d735bb6bf2

commit b3f799c0d450927bdf35798fcb70c4d735bb6bf2
Author: Patrick Palka <ppalka@redhat.com>
Date:   Wed Jan 22 21:55:27 2020 -0500

    Preincrement iterators instead of postincrementing where possible

Diff:
---
 libstdc++-v3/include/bits/ranges_algo.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/libstdc++-v3/include/bits/ranges_algo.h b/libstdc++-v3/include/bits/ranges_algo.h
index bbfb2aa..1105ff1 100644
--- a/libstdc++-v3/include/bits/ranges_algo.h
+++ b/libstdc++-v3/include/bits/ranges_algo.h
@@ -857,8 +857,8 @@ namespace ranges
 		    *__result = std::move(*__first);
 		  else
 		    *__result = *__first;
-		  __first++;
-		  __result++;
+		  ++__first;
+		  ++__result;
 		}
 	      return {std::move(__first), std::move(__result)};
 	    }
@@ -871,8 +871,8 @@ namespace ranges
 		*__result = std::move(*__first);
 	      else
 		*__result = *__first;
-	      __first++;
-	      __result++;
+	      ++__first;
+	      ++__result;
 	    }
 	  return {std::move(__first), std::move(__result)};
 	}