def.h

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#include <derive-c/core/prelude/macros.h> // NOLINT(misc-include-cleaner)
#include <derive-c/core/prelude/placeholder.h>

 
#if defined INTERNAL_NAME
    #if defined SELF
        #pragma push_macro("SELF")
        #define SELF_PUSHED
        #undef SELF
        #define SELF EXPAND(INTERNAL_NAME)
    #endif
#elif defined NAME
    #if defined SELF
        #error "Cannot redefine SELF"
    #endif
    #define SELF EXPAND(NAME)
#else
    #if !defined PLACEHOLDERS
        #error "The `SELF` type for a data structure must be defined (by `NAME` or `INTERNAL_NAME`)"
    #endif
    #define NAME self_t
    #define SELF NAME
#endif