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Subject: Re: [boost] enum / string translation
From: Stewart, Robert (Robert.Stewart_at_[hidden])
Date: 2009-07-27 10:54:32

Fatih wrote:
> I'm very interesting in this problem ,I think it's very hard
> to implement
> the string to enum translation at compile time, I have no
> ideas about it,
> wish you can work it out.

It is not difficult, though it requires registering the string against the value in a map during runtime initialization. (We use a library initialization mechanism, called from main(), to trigger such initialization.)

I've had code, plus simplifying macros, for years that creates an enumerated type within a class named by the caller so that the enumerators are scoped. As part of that, there is support for enumerator-to-string and string-to-enumerator mapping by virtue of registration calls which can map the enumerator to the stringized form (thanks to the preprocessor) or a supplied long name. (The stringized form is mapped, too, in the latter case.)

Enum classes solve the scoping part of my solution, of course.

Rob Stewart robert.stewart_at_[hidden]
Software Engineer, Core Software using std::disclaimer;
Susquehanna International Group, LLP

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