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#ifdef PARAMS_DECLARE_ENUM
#define param(_member, _default, _sym, _ctxt_type, _va_type) \
_sym,
#endif
#ifdef PARAMS_DECLARE_STRUCT
#define param(_member, _default, _sym, _ctxt_type, _va_type) \
_ctxt_type _member;
#endif
#ifdef PARAMS_IMPLEMENT_SWITCH
#define param(_member, _default, _sym, _ctxt_type, _va_type) \
case _sym: \
ctxt->_member = va_arg(params, _va_type); \
break;
#endif
#ifdef PARAMS_ASSIGN_DEFAULTS
#define param(_member, _default, _sym, _ctxt_type, _va_type) \
ctxt->_member = _default;
#endif
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