[Home]BOOST_MPL_AUX_LAMBDA_SUPPORT

Synopsis

#define BOOST_MPL_AUX_LAMBDA_SUPPORT(arity, fun, params) \
    unspecified token sequence \
/**/

Description

Broken compiler workaround macro, enables metafunction fun for the use in lambda expressions on compilers that don't support partial template specialization or/and template template parameters. Expands to nothing on conforming compilers.

Definition

#include "boost/mpl/aux_/lambda_support.hpp"

Parameters

 Parameter  Description  
arityThe metafunction's arity, i.e. the number of its template parameters, including the defaults.
funThe metafunction's name.
paramsPP-tuple of the metafunction's parameter names, in their original order.

Example

template< typename T, typename U = int > struct f
{
    typedef T type[sizeof(U)];

BOOST_MPL_AUX_LAMBDA_SUPPORT(2,f,(T,U)) };

typedef lambda< f<char,_1> >::type f_; // use f in a lambda expression typedef apply1<f_,long>::type res; BOOST_MPL_ASSERT_IS_SAME(res, char[sizeof(long)]);

See also

Macros


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Last edited November 12, 2003 1:29 am