From fe6325d5e356b93daa9e0b2c23ffd3e0f57bdcd2 Mon Sep 17 00:00:00 2001
From: q66 <daniel@octaforge.org>
Date: Sat, 23 May 2015 22:27:57 +0100
Subject: [PATCH] check for input range before checking for put() - avoid
 potential false positives

---
 octa/range.h | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/octa/range.h b/octa/range.h
index 2f28d7a..799fadb 100644
--- a/octa/range.h
+++ b/octa/range.h
@@ -87,11 +87,12 @@ namespace octa {
         static constexpr bool value = (sizeof(__octa_test<T>(0)) == sizeof(char));
     };
 
-    template<typename T, bool
-        = (IsConvertible<RangeCategory<T>, OutputRangeTag>::value ||
-        __OctaOutputRangeTest<T, const RangeValue<T> &>::value ||
-        __OctaOutputRangeTest<T, RangeValue<T> &&>::value)
-    > struct IsOutputRange: False {};
+    template<typename T, bool = (IsConvertible<
+        RangeCategory<T>, OutputRangeTag
+    >::value || (IsInputRange<T>::value &&
+        (__OctaOutputRangeTest<T, const RangeValue<T>  &>::value ||
+         __OctaOutputRangeTest<T,       RangeValue<T> &&>::value)
+    ))> struct IsOutputRange: False {};
 
     template<typename T>
     struct IsOutputRange<T, true>: True {};