Merge pull request #613 from CaseyCarter/contiguous_empty

view::empty is trivially contiguous
ericniebler · Mar 27, 2017 · 631d728 · 631d728
2 parents 7d82079 + d2c0340
commit 631d728
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diff --git a/include/range/v3/view/empty.hpp b/include/range/v3/view/empty.hpp
@@ -73,6 +73,10 @@ namespace ranges
             {
                 return 0u;
             }
+            constexpr T const *data() const
+            {
+                return nullptr;
+            }
         };
 
         namespace view

diff --git a/test/span.cpp b/test/span.cpp
@@ -26,8 +26,6 @@
 ///////////////////////////////////////////////////////////////////////////////
 
 #include <range/v3/span.hpp>
-#include "./simple_test.hpp"
-#include "./test_utils.hpp"
 
 #include <algorithm>
 #include <iostream>
@@ -37,6 +35,10 @@
 #include <string>
 #include <vector>
 
+#include <range/v3/view/empty.hpp>
+#include "./simple_test.hpp"
+#include "./test_utils.hpp"
+
 using namespace ranges;
 
 namespace
@@ -993,6 +995,11 @@ int main()
         (void)cs;
     }
 
+    {
+        span<int const> s{ranges::view::empty<int>()};
+        CHECK(s.empty());
+    }
+
     test_default_constructor();
     test_size_optimization();
     test_from_nullptr_constructor();