- Switched back to custom window management, taking another stab

- Refactored lang yet again, `fennec/lang` is now C++ language. `fennec/string` `fennec/filesystem` and `fennec/format` are now independent.

include/fennec/format/detail/_format.h

@@ -0,0 +1,90 @@
+// =====================================================================================================================
+//  fennec, a free and open source game engine
+//  Copyright © 2025  Medusa Slockbower
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+// =====================================================================================================================
+
+///
+/// \file _format.h
+/// \brief
+///
+///
+/// \details
+/// \author Medusa Slockbower
+///
+/// \copyright Copyright © 2025 Medusa Slockbower ([GPLv3](https://www.gnu.org/licenses/gpl-3.0.en.html))
+///
+///
+
+#ifndef FENNEC_LANG_STRINGS_DETAIL_FORMAT_H
+#define FENNEC_LANG_STRINGS_DETAIL_FORMAT_H
+
+#include <fennec/memory/pointers.h>
+#include <fennec/format/formatter.h>
+#include <fennec/format/format_arg.h>
+
+namespace fennec::detail
+{
+
+// Impl interface for templated polymorphism fuckery
+struct _format_argimpl {
+	_format_argimpl() {};
+	virtual ~_format_argimpl() {};
+	virtual string format(const format_arg& fmt) = 0;
+};
+
+// Polymorphic template specialization
+template<typename T>
+struct _format_arg : _format_argimpl {
+	formatter<T> fmtr;
+	const T& val;
+	_format_arg(const T& arg) : val(arg) {
+	}
+	virtual ~_format_arg() = default;
+	virtual string format(const format_arg& fmt) {
+		return fennec::forward<string>(fmtr(fmt, val));
+	}
+};
+
+// Polymorphic template specialization for rvalue_references
+template<typename T>
+struct _format_arg<T&> : _format_argimpl {
+	formatter<T> fmtr;
+	const T& val;
+	_format_arg(const T& arg) : val(arg) {
+	}
+	virtual ~_format_arg() = default;
+	virtual string format(const format_arg& fmt) {
+		return fennec::forward<string>(fmtr(fmt, val));
+	}
+};
+
+// Containing array for format args
+template<size_t N>
+struct _format_argarray {
+	array<unique_ptr<_format_argimpl>, N> args;
+	template<typename...ArgsT>
+	_format_argarray(ArgsT&&...args)
+		: args { unique_ptr<_format_argimpl>(new _format_arg<ArgsT>(fennec::forward<ArgsT>(args)))... } {
+	}
+
+	string format(size_t i, const format_arg& fmt) {
+		return args[i]->format(fmt);
+	}
+};
+
+}
+
+#endif // FENNEC_LANG_STRINGS_DETAIL_FORMAT_H