Re: [boost] [mpl] string to type conversion

Subject: Re: [boost] [mpl] string to type conversion
From: Ingo Loehken (Ingo.Loehken_at_[hidden])
Date: 2010-05-18 18:19:57

The only way I imagine this can be done, is by predefining all known 
words

up to a given length as suffix to a macro (as done with BOOST_PP_ADD), 
but

obviously this does not scale and also limits NAME to variable names.

#define BOOST_MPL_STRINGIZE(NAME) 
BOOST_PP_CAT(BOOST_PP_STRING_TO_TYPE_,NAME);

so that

BOOST_MPL_STRINGIZE(MyType)

is substituted by

BOOST_MPL_STRINGIZE_MyType

assuming an existing define for the trivial macro

#define BOOST_MPL_STRINGIZE_MyType 
boost::mpl::string<'M','y','T','y','p','e'>

you got what you need. But thats nearly useless, as such code needs to 
be

automatically generated by the preprocessor. I think its not worth the 
effort,

but maybe there are highly sophisticated ways to use the preprocessor 
lib of

boost, to do the generation job.

Any ideas ?

Best regards, Ingo.

-----boost-bounces_at_[hidden] wrote: -----

To: boost_at_[hidden]
From: Bartosz Marcinkiewicz <bma_at_[hidden]>
Sent by: boost-bounces_at_[hidden]
Date: 05/13/2010 11:09AM
Subject: [boost] [mpl] string to type conversion

Hello,

&nbsp;&nbsp; &nbsp;I would like to have a macro which could be used like this:

&nbsp;&nbsp; &nbsp; &nbsp; &nbsp;STRING_TO_TYPE( MyType ) 
&nbsp;&nbsp; &nbsp;
&nbsp;&nbsp; &nbsp;which would yield: 

&nbsp;&nbsp; &nbsp; &nbsp; &nbsp;typedef mpl::string<'M','y','T','y','p','e'> MyType_id_t;

&nbsp;&nbsp; &nbsp;Any ideas how to implement something like that?

Thanks for any help, bma.

-- 
Bartosz Marcinkiewicz
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