[PARSE BUG]: Problem with #if directive in enums

[s33b00r]

Problem description

When parsing a c++ file, there seems to be a problem with enums and some preprocessor items within an enum block.
From the given code, I got this error message: parse error evaluating '#if !defined(_WIN32)': unexpected '#if !defined(_WIN32)', expected '}' or 'NAME'

C++ code that can't be parsed correctly (please double-check that https://robotpy.github.io/cxxheaderparser/ has the same error)

enum {
    OK                = 0,
    // More enums [...]
#if !defined(_WIN32)
    BAD_INDEX           = -1,
    // More enums [...]
#else    
    BAD_INDEX           = -31,
    // More enums [...]
#endif    
    UNEXPECTED_NULL     = 15,
    // More enums [...]
};

[auscompgeek]

Per the readme, this doesn't support preprocessor directives such as #if.

No C preprocessor substitution support implemented. If you are parsing headers that contain macros, you should preprocess your code using the excellent pure python preprocessor pcpp or your favorite compiler