library/cpp/deprecated/enum_codegen/enum_codegen.h


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#pragma once

/// see enum_codegen_ut.cpp for examples

#define ENUM_VALUE_GEN(name, value, ...) name = value,
#define ENUM_VALUE_GEN_NO_VALUE(name, ...) name,

#define ENUM_TO_STRING_IMPL_ITEM(name, ...) \ 
    case name:                              \ 
        return #name; 
#define ENUM_LTLT_IMPL_ITEM(name, ...) \ 
    case name:                         \ 
        os << #name;                   \ 
        break; 

#define ENUM_TO_STRING(type, MAP)                                            \ 
    static inline const char* ToCString(type value) {                        \ 
        switch (value) {                                                     \ 
            MAP(ENUM_TO_STRING_IMPL_ITEM)                                    \ 
            default:                                                         \ 
                return "UNKNOWN";                                            \ 
        }                                                                    \ 
    }                                                                        \ 
                                                                             \ 
    static inline IOutputStream& operator<<(IOutputStream& os, type value) { \
        switch (value) {                                                     \ 
            MAP(ENUM_LTLT_IMPL_ITEM)                                         \ 
            default:                                                         \ 
                os << int(value);                                            \ 
                break;                                                       \ 
        }                                                                    \ 
        return os;                                                           \ 
    }