define hash struct for scoped enum for header_footer's unordered_map

include/xlnt/utils/scoped_enum_hash.hpp

@@ -0,0 +1,44 @@
+// Copyright (c) 2016 Thomas Fussell
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, WRISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE
+//
+// @license: http://www.opensource.org/licenses/mit-license.php
+// @author: see AUTHORS file
+
+#pragma once
+
+#include <utility> // for std::hash
+
+namespace xlnt {
+
+/// <summary>
+/// Allows a scoped enum (aka "enum class") to be used as a key
+/// in a std::unordered_map.
+/// </summary>
+template<typename Enum>
+struct scoped_enum_hash
+{
+    std::size_t operator()(Enum e) const
+    {
+	static std::hash<std::size_t> hasher;
+	return hasher(static_cast<std::size_t>(e));
+    }
+};
+
+} // namespace xlnt

include/xlnt/worksheet/header_footer.hpp

@@ -30,6 +30,7 @@
 
 #include <xlnt/xlnt_config.hpp>
 #include <xlnt/cell/formatted_text.hpp>
+#include <xlnt/utils/scoped_enum_hash.hpp>
 
 namespace xlnt {
 
@@ -311,12 +312,14 @@ private:
     bool different_odd_even_ = false;
     bool scale_with_doc_ = false;
 
-    std::unordered_map<location, formatted_text> odd_headers_;
+    using container = std::unordered_map<location, formatted_text, scoped_enum_hash<location>>;
-    std::unordered_map<location, formatted_text> even_headers_;
+
-    std::unordered_map<location, formatted_text> first_headers_;
+    container odd_headers_;
-    std::unordered_map<location, formatted_text> odd_footers_;
+    container even_headers_;
-    std::unordered_map<location, formatted_text> even_footers_;
+    container first_headers_;
-    std::unordered_map<location, formatted_text> first_footers_;
+    container odd_footers_;
+    container even_footers_;
+    container first_footers_;
 };
 
 } // namespace xlnt

source/detail/default_case.hpp

@@ -1,3 +1,26 @@
+// Copyright (c) 2016 Thomas Fussell
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, WRISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE
+//
+// @license: http://www.opensource.org/licenses/mit-license.php
+// @author: see AUTHORS file
+
 #pragma once
 
 #define EXCEPT_ON_UNHANDLED_SWITCH_CASE