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tjp/core/exception/Exception.hpp

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+// License: Modified MIT (NON-AI)
+// See the LICENSE file in the root directory for license information.
+// Copyright 2025 Timothy Prepscius
+
+#pragma once
+
+#include "Exception.h"
+#include "../string/String.hpp"
+#include "../string/StringView.hpp"
+#include <exception>
+
+#define TJP_EXCEPTION_BASE ::tjp::core::Exception
+
+#define DECLARE_EXCEPTION_BASE(e,k) \
+	struct e : k \
+	{ \
+		typedef k Super; \
+		e(const value_type &what) : Super(what) { } \
+		e() { } \
+	} ;\
+
+#define DECLARE_EXCEPTION_BASE_MSG(e,k,msg) \
+	struct e : k \
+	{ \
+		typedef k Super; \
+		e(const value_type &what) : Super(what) { } \
+		e() : Super(msg) { } \
+	} ;\
+
+#define DECLARE_EXCEPTION_BASE_MSG_PREFIX(e,k,msg) \
+	struct e : k \
+	{ \
+		static constexpr ::tjp::core::StringView Prefix = msg; \
+		typedef k Super; \
+		e(const value_type &what) : Super(msg ": " + what) { } \
+		e() : Super(msg) { } \
+	} ;\
+
+#define DECLARE_EXCEPTION_BASE_MSG_PREFIX_ARGS(e,k,msg,...) \
+	struct e : k \
+	{ \
+		static constexpr ::tjp::core::StringView Prefix = msg; \
+		typedef k Super; \
+		e(const value_type &what) : Super(msg ": " + what, __VA_ARGS__) { } \
+		e() : Super(msg, __VA_ARGS__) { } \
+	} ;\
+
+
+#define DECLARE_EXCEPTION(e) DECLARE_EXCEPTION_BASE(e, TJP_EXCEPTION_BASE)
+#define DECLARE_EXCEPTION_MESSAGE(e, msg) DECLARE_EXCEPTION_BASE_MSG(e,TJP_EXCEPTION_BASE, msg)
+
+namespace tjp::core {
+
+class Exception
+{
+public:
+	using value_type = String;
+
+private:
+	value_type _what;
+
+public:
+	Exception (const value_type &what) : _what(what) { }
+	Exception () { }
+	virtual ~Exception () { }
+
+	const value_type &what() const throw() { return _what; }
+	value_type &what() throw() { return _what; }
+} ;
+
+} // namespace