#include "boost/preprocessor.hpp" #define XXX_PP_ARG_N( \ _1, _2, _3, _4, _5, _6, _7, _8, _9,_10, \ _11,_12,_13,_14,_15,_16,_17,_18,_19,_20, \ _21,_22,_23,_24,_25,_26,_27,_28,_29,_30, \ _31,_32,_33,_34,_35,_36,_37,_38,_39,_40, \ _41,_42,_43,_44,_45,_46,_47,_48,_49,_50, \ _51,_52,_53,_54,_55,_56,_57,_58,_59,_60, \ _61,_62,_63,N,...) N #define XXX_PP_RSEQ_N() \ 63,62,61,60, \ 59,58,57,56,55,54,53,52,51,50, \ 49,48,47,46,45,44,43,42,41,40, \ 39,38,37,36,35,34,33,32,31,30, \ 29,28,27,26,25,24,23,22,21,20, \ 19,18,17,16,15,14,13,12,11,10, \ 9,8,7,6,5,4,3,2,1,0 #define XXX_PP_NARG_(...) \ XXX_PP_ARG_N(__VA_ARGS__) #define XXX_PP_NARG(...) \ XXX_PP_NARG_(__VA_ARGS__,XXX_PP_RSEQ_N()) #define XXX_TUPLE_SIZE_INTERNAL(TUPLE) XXX_PP_NARG TUPLE #define XXX_TUPLE_CHOICE(i) \ BOOST_PP_APPLY( \ BOOST_PP_TUPLE_ELEM( \ 25, i, (\ (0), (1), (2), (3) , (4) , (5) , (6) , (7) , (8) , (9) , (10) , (11) \ , (12) , (13) , (14) , (15) , (16) , (17) , (18) , (19) , (20) , (21) \ , (22) , (23) , (24) \ ) \ ) \ ) #define BOOST_PP_BOOL_00 BOOST_PP_BOOL_0 #define BOOST_PP_BOOL_01 BOOST_PP_BOOL_1 #define BOOST_PP_BOOL_02 BOOST_PP_BOOL_2 #define BOOST_PP_BOOL_03 BOOST_PP_BOOL_3 #define BOOST_PP_BOOL_04 BOOST_PP_BOOL_4 #define BOOST_PP_BOOL_05 BOOST_PP_BOOL_5 #define BOOST_PP_BOOL_06 BOOST_PP_BOOL_6 #define BOOST_PP_BOOL_07 BOOST_PP_BOOL_7 #define BOOST_PP_BOOL_08 BOOST_PP_BOOL_8 #define BOOST_PP_BOOL_09 BOOST_PP_BOOL_9 #define BOOST_PP_BOOL_010 BOOST_PP_BOOL_10 #define BOOST_PP_BOOL_011 BOOST_PP_BOOL_11 #define BOOST_PP_BOOL_012 BOOST_PP_BOOL_12 #define BOOST_PP_BOOL_013 BOOST_PP_BOOL_13 #define BOOST_PP_BOOL_014 BOOST_PP_BOOL_14 #define BOOST_PP_BOOL_015 BOOST_PP_BOOL_15 #define BOOST_PP_BOOL_016 BOOST_PP_BOOL_16 #define BOOST_PP_BOOL_017 BOOST_PP_BOOL_17 #define BOOST_PP_BOOL_018 BOOST_PP_BOOL_18 #define BOOST_PP_BOOL_019 BOOST_PP_BOOL_19 #define BOOST_PP_BOOL_020 BOOST_PP_BOOL_20 #define BOOST_PP_BOOL_021 BOOST_PP_BOOL_21 #define BOOST_PP_BOOL_022 BOOST_PP_BOOL_22 #define BOOST_PP_BOOL_023 BOOST_PP_BOOL_23 #define BOOST_PP_BOOL_024 BOOST_PP_BOOL_24 #define BOOST_PP_BOOL_025 BOOST_PP_BOOL_25 #define BOOST_PP_BOOL_026 BOOST_PP_BOOL_26 #define BOOST_PP_BOOL_027 BOOST_PP_BOOL_27 #define BOOST_PP_BOOL_028 BOOST_PP_BOOL_28 #define BOOST_PP_BOOL_029 BOOST_PP_BOOL_29 #define BOOST_PP_BOOL_030 BOOST_PP_BOOL_30 #define BOOST_PP_BOOL_031 BOOST_PP_BOOL_31 #define BOOST_PP_BOOL_032 BOOST_PP_BOOL_32 #define BOOST_PP_BOOL_033 BOOST_PP_BOOL_33 #define BOOST_PP_BOOL_034 BOOST_PP_BOOL_34 #define BOOST_PP_BOOL_035 BOOST_PP_BOOL_35 #define BOOST_PP_BOOL_036 BOOST_PP_BOOL_36 #define BOOST_PP_BOOL_037 BOOST_PP_BOOL_37 #define BOOST_PP_BOOL_038 BOOST_PP_BOOL_38 #define BOOST_PP_BOOL_039 BOOST_PP_BOOL_39 #define BOOST_PP_BOOL_040 BOOST_PP_BOOL_40 #define BOOST_PP_BOOL_041 BOOST_PP_BOOL_41 #define BOOST_PP_BOOL_042 BOOST_PP_BOOL_42 #define BOOST_PP_BOOL_043 BOOST_PP_BOOL_43 #define BOOST_PP_BOOL_044 BOOST_PP_BOOL_44 #define BOOST_PP_BOOL_045 BOOST_PP_BOOL_45 #define BOOST_PP_BOOL_046 BOOST_PP_BOOL_46 #define BOOST_PP_BOOL_047 BOOST_PP_BOOL_47 #define BOOST_PP_BOOL_048 BOOST_PP_BOOL_48 #define BOOST_PP_BOOL_049 BOOST_PP_BOOL_49 #define BOOST_PP_BOOL_050 BOOST_PP_BOOL_50 #define BOOST_PP_BOOL_051 BOOST_PP_BOOL_51 #define BOOST_PP_BOOL_052 BOOST_PP_BOOL_52 #define BOOST_PP_BOOL_053 BOOST_PP_BOOL_53 #define BOOST_PP_BOOL_054 BOOST_PP_BOOL_54 #define BOOST_PP_BOOL_055 BOOST_PP_BOOL_55 #define BOOST_PP_BOOL_056 BOOST_PP_BOOL_56 #define BOOST_PP_BOOL_057 BOOST_PP_BOOL_57 #define BOOST_PP_BOOL_058 BOOST_PP_BOOL_58 #define BOOST_PP_BOOL_059 BOOST_PP_BOOL_59 #define BOOST_PP_BOOL_060 BOOST_PP_BOOL_60 #define BOOST_PP_BOOL_061 BOOST_PP_BOOL_61 #define BOOST_PP_BOOL_062 BOOST_PP_BOOL_62 #define BOOST_PP_BOOL_063 BOOST_PP_BOOL_63 #define BOOST_PP_DEC_00 BOOST_PP_DEC_0 #define BOOST_PP_DEC_01 BOOST_PP_DEC_1 #define BOOST_PP_DEC_02 BOOST_PP_DEC_2 #define BOOST_PP_DEC_03 BOOST_PP_DEC_3 #define BOOST_PP_DEC_04 BOOST_PP_DEC_4 #define BOOST_PP_DEC_05 BOOST_PP_DEC_5 #define BOOST_PP_DEC_06 BOOST_PP_DEC_6 #define BOOST_PP_DEC_07 BOOST_PP_DEC_7 #define BOOST_PP_DEC_08 BOOST_PP_DEC_8 #define BOOST_PP_DEC_09 BOOST_PP_DEC_9 #define BOOST_PP_DEC_010 BOOST_PP_DEC_10 #define BOOST_PP_DEC_011 BOOST_PP_DEC_11 #define BOOST_PP_DEC_012 BOOST_PP_DEC_12 #define BOOST_PP_DEC_013 BOOST_PP_DEC_13 #define BOOST_PP_DEC_014 BOOST_PP_DEC_14 #define BOOST_PP_DEC_015 BOOST_PP_DEC_15 #define BOOST_PP_DEC_016 BOOST_PP_DEC_16 #define BOOST_PP_DEC_017 BOOST_PP_DEC_17 #define BOOST_PP_DEC_018 BOOST_PP_DEC_18 #define BOOST_PP_DEC_019 BOOST_PP_DEC_19 #define BOOST_PP_DEC_020 BOOST_PP_DEC_20 #define BOOST_PP_DEC_021 BOOST_PP_DEC_21 #define BOOST_PP_DEC_022 BOOST_PP_DEC_22 #define BOOST_PP_DEC_023 BOOST_PP_DEC_23 #define BOOST_PP_DEC_024 BOOST_PP_DEC_24 #define BOOST_PP_DEC_025 BOOST_PP_DEC_25 #define BOOST_PP_DEC_026 BOOST_PP_DEC_26 #define BOOST_PP_DEC_027 BOOST_PP_DEC_27 #define BOOST_PP_DEC_028 BOOST_PP_DEC_28 #define BOOST_PP_DEC_029 BOOST_PP_DEC_29 #define BOOST_PP_DEC_030 BOOST_PP_DEC_30 #define BOOST_PP_DEC_031 BOOST_PP_DEC_31 #define BOOST_PP_DEC_032 BOOST_PP_DEC_32 #define BOOST_PP_DEC_033 BOOST_PP_DEC_33 #define BOOST_PP_DEC_034 BOOST_PP_DEC_34 #define BOOST_PP_DEC_035 BOOST_PP_DEC_35 #define BOOST_PP_DEC_036 BOOST_PP_DEC_36 #define BOOST_PP_DEC_037 BOOST_PP_DEC_37 #define BOOST_PP_DEC_038 BOOST_PP_DEC_38 #define BOOST_PP_DEC_039 BOOST_PP_DEC_39 #define BOOST_PP_DEC_040 BOOST_PP_DEC_40 #define BOOST_PP_DEC_041 BOOST_PP_DEC_41 #define BOOST_PP_DEC_042 BOOST_PP_DEC_42 #define BOOST_PP_DEC_043 BOOST_PP_DEC_43 #define BOOST_PP_DEC_044 BOOST_PP_DEC_44 #define BOOST_PP_DEC_045 BOOST_PP_DEC_45 #define BOOST_PP_DEC_046 BOOST_PP_DEC_46 #define BOOST_PP_DEC_047 BOOST_PP_DEC_47 #define BOOST_PP_DEC_048 BOOST_PP_DEC_48 #define BOOST_PP_DEC_049 BOOST_PP_DEC_49 #define BOOST_PP_DEC_050 BOOST_PP_DEC_50 #define BOOST_PP_DEC_051 BOOST_PP_DEC_51 #define BOOST_PP_DEC_052 BOOST_PP_DEC_52 #define BOOST_PP_DEC_053 BOOST_PP_DEC_53 #define BOOST_PP_DEC_054 BOOST_PP_DEC_54 #define BOOST_PP_DEC_055 BOOST_PP_DEC_55 #define BOOST_PP_DEC_056 BOOST_PP_DEC_56 #define BOOST_PP_DEC_057 BOOST_PP_DEC_57 #define BOOST_PP_DEC_058 BOOST_PP_DEC_58 #define BOOST_PP_DEC_059 BOOST_PP_DEC_59 #define BOOST_PP_DEC_060 BOOST_PP_DEC_60 #define BOOST_PP_DEC_061 BOOST_PP_DEC_61 #define BOOST_PP_DEC_062 BOOST_PP_DEC_62 #define BOOST_PP_DEC_063 BOOST_PP_DEC_63 #define XXX_TO_NUMx(x) 0 ## x #define XXX_TO_NUM(x) BOOST_PP_ADD(0,XXX_TO_NUMx(x)) #define XXX_STRINGIZEX(x) # x #define XXX_VSTRINGIZE_SINGLE(a,b,x) XXX_STRINGIZE(x) #define XXX_VSTRINGIZE_TUPLE(tpl) XXX_TUPLE_FOR_EACH(XXX_VSTRINGIZE_SINGLE,,tpl) #define XXX_TUPLE_SIZE(TUPLE) XXX_TO_NUM(XXX_TUPLE_CHOICE(XXX_TUPLE_SIZE_INTERNAL(TUPLE))) #define XXX_TUPLE_FOR_EACH(MACRO,DATA,TUPLE) BOOST_PP_LIST_FOR_EACH(MACRO,DATA,BOOST_PP_TUPLE_TO_LIST(XXX_TUPLE_SIZE(TUPLE),TUPLE)) #define XXX_STRINGIZE(x) XXX_STRINGIZEX(x) #define XXX_VSTRINGIZE(...) XXX_VSTRINGIZE_TUPLE((__VA_ARGS__)) #define XXX_CAST_TO_VOID_ELEMENT(r,data,elem) (void)(elem); #define XXX_CAST_TO_VOID_INTERNAL(TUPLE) \ XXX_TUPLE_FOR_EACH(XXX_CAST_TO_VOID_ELEMENT,,TUPLE) #define XXX_CAST_TO_VOID(...) XXX_CAST_TO_VOID_INTERNAL((__VA_ARGS__)) #define XXX_ENUM_EXTRACT_SP(en) BOOST_PP_TUPLE_ELEM(XXX_TUPLE_SIZE(en),0,en) = BOOST_PP_TUPLE_ELEM(XXX_TUPLE_SIZE(en),1,en) #define XXX_ENUM_ELEMENT(r,data,elem) BOOST_PP_IF( XXX_TUPLE_SIZE(elem), XXX_ENUM_EXTRACT_SP(elem), elem) , #define XXX_ENUM_EXTRACT_ELEMENT(en) BOOST_PP_TUPLE_ELEM(XXX_TUPLE_SIZE(en),0,en) #define XXX_ENUM_CASE_ELEMENT(en) BOOST_PP_IF( XXX_TUPLE_SIZE(en), XXX_ENUM_EXTRACT_ELEMENT(en), en ) #define XXX_ENUM_CASE(r,data,elem) case data :: XXX_ENUM_CASE_ELEMENT(elem) : return #data "::" XXX_STRINGIZE(XXX_ENUM_CASE_ELEMENT(elem)); #define XXX_ENUM_IFELSE(r,data,elem) else if( en == data :: XXX_ENUM_CASE_ELEMENT(elem)) { return #data "::" XXX_STRINGIZE(XXX_ENUM_CASE_ELEMENT(elem)); } #define XXX_ENUM_CASTLIST(r,data,elem) { XXX_STRINGIZE(XXX_ENUM_CASE_ELEMENT(elem)), data :: XXX_ENUM_CASE_ELEMENT(elem) }, #define XXX_ENUM_QUALIFIED_CASTLIST(r,data,elem) { #data "::" XXX_STRINGIZE(XXX_ENUM_CASE_ELEMENT(elem)), data :: XXX_ENUM_CASE_ELEMENT(elem) }, #define XXX_ENUM_INTERNAL(TYPE,NAME,TUPLE) \ enum TYPE \ { \ XXX_TUPLE_FOR_EACH(XXX_ENUM_ELEMENT,,TUPLE) \ BOOST_PP_CAT(last_enum_,NAME) \ }; \ \ inline \ const char* to_string( NAME en ) \ { \ if(false) \ { \ } \ XXX_TUPLE_FOR_EACH(XXX_ENUM_IFELSE,NAME,TUPLE) \ else if( en == NAME :: BOOST_PP_CAT(last_enum_,NAME) ) \ { \ return XXX_VSTRINGIZE(NAME,::, BOOST_PP_CAT(last_enum_,NAME)); \ } \ else \ { \ return "Invalid enum value specified for " # NAME; \ } \ } \ \ inline \ std::ostream& operator<<( std::ostream& os, const NAME& en ) \ { \ os << to_string(en); \ return os; \ } \ \ \ inline \ NAME do_enum_cast( const std::string& s, const ::xxx::enum_cast_adl_helper& ) \ { \ static const std::unordered_map map = \ { \ XXX_TUPLE_FOR_EACH(XXX_ENUM_CASTLIST,NAME,TUPLE) \ XXX_TUPLE_FOR_EACH(XXX_ENUM_QUALIFIED_CASTLIST,NAME,TUPLE) \ }; \ \ auto cit = map.find(s); \ if( cit == map.end() ) \ { \ /*XXX_THROW(xxx::exception,"Invalid value '%1%' to cast to enum " #NAME ,s);*/ \ throw std::runtime_error("Invalid value to cast to enum"); \ } \ return cit->second; \ } #define XXX_ENUM(NAME,TUPLE) XXX_ENUM_INTERNAL(NAME,NAME,TUPLE) #define XXX_ENUM_CLASS(NAME,TUPLE) XXX_ENUM_INTERNAL(class NAME,NAME,TUPLE) #define XXX_ENUM_CLASS_TYPE(NAME,TYPE,TUPLE) XXX_ENUM_INTERNAL(class NAME : TYPE,NAME,TUPLE) #define XXX_ENUM_TYPE(NAME,TYPE,TUPLE) XXX_ENUM_INTERNAL(NAME : TYPE,NAME,TUPLE) #include #include #include namespace xxx { template struct enum_cast_adl_helper { }; template E enum_cast( const std::string& s ) { return do_enum_cast(s,enum_cast_adl_helper()); } template E enum_cast( const char* cs ) { std::string s(cs); return enum_cast(s); } } // namespace xxx XXX_ENUM(foo,(a,b,(c,42))); int main(int argc, const char *argv[]) { std::cout << "foo::a = " << foo::a << "\n"; std::cout << "(int)foo::c = " << (int)foo::c << "\n"; std::cout << "to_string(foo::b) = " << to_string(foo::b) << "\n"; std::cout << "xxx::enum_cast(\"b\") = " << xxx::enum_cast("b") << "\n"; } // vim: tabstop=4 shiftwidth=4 noexpandtab