Add exit operand

include/interpret/statement.hpp

@@ -71,6 +71,11 @@ namespace Interpret
 		void Execute(Execute::Flags & flags, Execute::State & state, Execute::Registers & registers) override;
 	};
 
+	struct ExitProgramStatement : Statement
+	{
+		void Execute(Execute::Flags & flags, Execute::State & state, Execute::Registers & registers) override;
+	};
+
 	struct SetStatement : Statement
 	{
 		Value firstArgument;