chore: separate definitions from declarations for argument parser where possible.

src/source/parser/platform_parsers/macos_parser.cpp

@@ -0,0 +1,31 @@
+#ifdef __APPLE__
+
+#include "macos_parser.hpp"
+
+namespace argument_parser {
+	macos_parser::macos_parser() {
+		const int argc = *_NSGetArgc();
+		if (char **argv = *_NSGetArgv(); argc > 0 && argv != nullptr && argv[0] != nullptr) {
+			program_name = (argv[0]);
+			for (int i = 1; i < argc; ++i) {
+				if (argv[i] != nullptr)
+					parsed_arguments.emplace_back(argv[i]);
+			}
+		}
+	}
+
+	namespace v2 {
+		macos_parser::macos_parser() {
+			const int argc = *_NSGetArgc();
+			if (char **argv = *_NSGetArgv(); argc > 0 && argv != nullptr && argv[0] != nullptr) {
+				set_program_name(argv[0]);
+				for (int i = 1; i < argc; ++i) {
+					if (argv[i] != nullptr)
+						ref_parsed_args().emplace_back(argv[i]);
+				}
+			}
+		}
+	} // namespace v2
+} // namespace argument_parser
+
+#endif