/s/boost::beast::span/std::span

std::span is now available in c++ 20 builds, and should be a drop in
replacement for boost::span we were using previously.  This commit sed
replaces it, and changes reference to cbegin and cend to begin and end
respectively.

Tested:
Ran redfish-service-validator.  No new failures, and all nodes within
/redfish/v1/Registries that would be effected by this change respond
with 200 and the same content as previously.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: Iace89473b7c20f32106eae9d872c16cfae5f17f6

1 files changed, 10 insertions, 9 deletions

diff --git a/redfish-core/include/event_service_manager.hpp b/redfish-core/include/event_service_manager.hpp
index a20f36ac0e..eb076c97e5 100644
--- a/redfish-core/include/event_service_manager.hpp
+++ b/redfish-core/include/event_service_manager.hpp
@@ -36,6 +36,7 @@
 #include <ctime>
 #include <fstream>
 #include <memory>
+#include <span>
 #include <variant>
 
 namespace redfish
@@ -52,22 +53,22 @@ static constexpr const char* eventServiceFile =
 
 namespace message_registries
 {
-inline boost::beast::span<const MessageEntry>
+inline std::span<const MessageEntry>
     getRegistryFromPrefix(const std::string& registryName)
 {
     if (task_event::header.registryPrefix == registryName)
     {
-        return boost::beast::span<const MessageEntry>(task_event::registry);
+        return {task_event::registry};
     }
     if (openbmc::header.registryPrefix == registryName)
     {
-        return boost::beast::span<const MessageEntry>(openbmc::registry);
+        return {openbmc::registry};
     }
     if (base::header.registryPrefix == registryName)
     {
-        return boost::beast::span<const MessageEntry>(base::registry);
+        return {base::registry};
     }
-    return boost::beast::span<const MessageEntry>(openbmc::registry);
+    return {openbmc::registry};
 }
 } // namespace message_registries
 
@@ -89,14 +90,14 @@ namespace message_registries
 {
 static const Message*
     getMsgFromRegistry(const std::string& messageKey,
-                       const boost::beast::span<const MessageEntry>& registry)
+                       const std::span<const MessageEntry>& registry)
 {
-    boost::beast::span<const MessageEntry>::const_iterator messageIt =
-        std::find_if(registry.cbegin(), registry.cend(),
+    std::span<const MessageEntry>::iterator messageIt =
+        std::find_if(registry.begin(), registry.end(),
                      [&messageKey](const MessageEntry& messageEntry) {
                          return !messageKey.compare(messageEntry.first);
                      });
-    if (messageIt != registry.cend())
+    if (messageIt != registry.end())
     {
         return &messageIt->second;
     }