Re: [Boost-Users] Boost Concept Check Library

From: Jeremy Siek (jsiek_at_[hidden])
Date: 2002-08-20 10:31:15

Hi Igor,

What about concepts defined within a doubly nested namespace? Will that
also work?

Have you tested the code below with VC++?

On Tue, 20 Aug 2002, igor_bashkirov wrote:
igor_b>
igor_b> [code
igor_b>
igor_b> #define BOOST_CLASS_REQUIRES(type_var, ns, concept) \
igor_b>   typedef void (ns::concept <type_var>::* func##type_var##ns##concept)
igor_b> (); \
igor_b>   template <func##type_var##ns##concept _Tp1> \
igor_b>   struct concept_checking_##type_var##ns##concept { }; \
igor_b>   typedef concept_checking_##type_var##ns##concept< \
igor_b>     BOOST_FPTR ns::concept <type_var>::constraints> \
igor_b>     concept_checking_typedef_##type_var##ns##concept;
igor_b>
igor_b> end code]

----------------------------------------------------------------------
 Jeremy Siek                          http://php.indiana.edu/~jsiek/
 Ph.D. Student, Indiana Univ. B'ton   email: jsiek_at_[hidden]
 C++ Booster (http://www.boost.org)   office phone: [phone]
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