From 3e499e70fd947e6c4487f9496c1647909a61586f Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Tue, 20 Aug 2019 12:31:46 -0700
Subject: Try to improve non-dynamic-extent span construction

---
 common/alspan.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/common/alspan.h b/common/alspan.h
index 6a43b32a..63b36eaa 100644
--- a/common/alspan.h
+++ b/common/alspan.h
@@ -116,8 +116,8 @@ public:
     constexpr span(U &cont) : span{al::data(cont), al::size(cont)} { }
     template<typename U, REQUIRES(IS_VALID_CONTAINER(const U))>
     constexpr span(const U &cont) : span{al::data(cont), al::size(cont)} { }
-    template<typename U, size_t N, REQUIRES(!std::is_same<element_type,U>::value && extent == N && std::is_convertible<U(*)[],element_type(*)[]>::value)>
-    constexpr span(const span<U,N> &span_) noexcept : span{al::data(span_), al::size(span_)} { }
+    template<typename U, REQUIRES(!std::is_same<element_type,U>::value && std::is_convertible<U(*)[],element_type(*)[]>::value)>
+    constexpr span(const span<U,E> &span_) noexcept : span{al::data(span_), al::size(span_)} { }
     constexpr span(const span&) noexcept = default;
 
     span& operator=(const span &rhs) noexcept = default;
-- 
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