Strongly-typed non-scoped enums in C++11?

Newsgroup: comp.lang.c++

Subject: Strongly-typed non-scoped enums in C++11?

From: Paavo Helde <myfirstname@...>

Date: Fri, 23 Aug 2013 02:28:33 -0500





In C++11, you can have 'enum class abc' which is strongly-typed and

scoped, and 'enum abc: type' which are not scoped, but also not

strongly-typed. However, I would like to have a non-scoped strongly-typed

enum, is this possible somehow?



Background: I would like to have strongly-typed enums in order to find

out and fix suspicious comparisons and conversions to integers. However,

only one of our build machines has a compiler version which supports C++

11 enums, a legacy enum is needed for other builds. For the diagnostics

point of view it is fine if it works only in one build, so I thought

doing something like:



#ifdef HAS_C11_STRONGLY_TYPED_ENUMS

enum class abc {

#else

enum abc {

#endif

val1,

val2,

....

};



Alas, now all the codebase must be changed to use the names abc::val1,

abc::val2 in the C11 branch, and must not use the prefix in the legacy

branch. This seems to kill the whole benefit of this approach. Any ideas?



TIA

Paavo

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