From 45aaf22acd55d6c6dc0b3fd2f51de92608bff087 Mon Sep 17 00:00:00 2001
From: Damian Jarek <damian.jarek93@gmail.com>
Date: Sat, 20 Apr 2019 00:55:52 +0200
Subject: [PATCH] Relax requirements for vector_body:

fix: #1567

std::byte is not an arithmetic type, which caused compilation to fail
when it was used in vector_body.

Signed-off-by: Damian Jarek <damian.jarek93@gmail.com>
---
 CHANGELOG.md                             | 1 +
 include/boost/beast/http/vector_body.hpp | 3 +--
 test/beast/http/vector_body.cpp          | 7 +++++++
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e674ac63..8e32a4df 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@ Version 253:
 * Fix async_detect_ssl handler type
 * member get_executor const-correctness
 * Fix min/max on MSVC
+* Relax requirements for vector_body
 
 --------------------------------------------------------------------------------
 
diff --git a/include/boost/beast/http/vector_body.hpp b/include/boost/beast/http/vector_body.hpp
index b44ef0f6..1317ec3f 100644
--- a/include/boost/beast/http/vector_body.hpp
+++ b/include/boost/beast/http/vector_body.hpp
@@ -39,8 +39,7 @@ template<class T, class Allocator = std::allocator<T>>
 struct vector_body
 {
 private:
-    static_assert(sizeof(T) == 1 &&
-        std::is_integral<T>::value,
+    static_assert(sizeof(T) == 1,
         "T requirements not met");
 
 public:
diff --git a/test/beast/http/vector_body.cpp b/test/beast/http/vector_body.cpp
index 588df5e8..142d17e1 100644
--- a/test/beast/http/vector_body.cpp
+++ b/test/beast/http/vector_body.cpp
@@ -9,6 +9,7 @@
 
 // Test that header file is self-contained.
 #include <boost/beast/http/vector_body.hpp>
+#include <cstddef>
 
 namespace boost {
 namespace beast {
@@ -18,6 +19,12 @@ BOOST_STATIC_ASSERT(is_body<vector_body<char>>::value);
 BOOST_STATIC_ASSERT(is_body_writer<vector_body<char>>::value);
 BOOST_STATIC_ASSERT(is_body_reader<vector_body<char>>::value);
 
+#if __cpp_lib_byte >= 201603
+BOOST_STATIC_ASSERT(is_body<vector_body<std::byte>>::value);
+BOOST_STATIC_ASSERT(is_body_writer<vector_body<std::byte>>::value);
+BOOST_STATIC_ASSERT(is_body_reader<vector_body<std::byte>>::value);
+#endif
+
 } // http
 } // beast
 } // boost