epoc32/include/stdapis/boost/mpl/eval_if.hpp
author William Roberts <williamr@symbian.org>
Wed, 31 Mar 2010 12:33:34 +0100
branchSymbian3
changeset 4 837f303aceeb
permissions -rw-r--r--
Current Symbian^3 public API header files (from PDK 3.0.h)
This is the epoc32/include tree with the "platform" subtrees removed, and
all but a selected few mbg and rsg files removed.
     1 
     2 #ifndef BOOST_MPL_EVAL_IF_HPP_INCLUDED
     3 #define BOOST_MPL_EVAL_IF_HPP_INCLUDED
     4 
     5 // Copyright Aleksey Gurtovoy 2000-2004
     6 //
     7 // Distributed under the Boost Software License, Version 1.0. 
     8 // (See accompanying file LICENSE_1_0.txt or copy at 
     9 // http://www.boost.org/LICENSE_1_0.txt)
    10 //
    11 // See http://www.boost.org/libs/mpl for documentation.
    12 
    13 // $Source: /cvsroot/boost/boost/boost/mpl/eval_if.hpp,v $
    14 // $Date: 2004/11/28 01:54:10 $
    15 // $Revision: 1.3 $
    16 
    17 #include <boost/mpl/if.hpp>
    18 #include <boost/mpl/aux_/na_spec.hpp>
    19 #include <boost/mpl/aux_/lambda_support.hpp>
    20 #include <boost/mpl/aux_/config/msvc.hpp>
    21 #include <boost/mpl/aux_/config/gcc.hpp>
    22 #include <boost/mpl/aux_/config/workaround.hpp>
    23 
    24 namespace boost { namespace mpl {
    25 
    26 template<
    27       typename BOOST_MPL_AUX_NA_PARAM(C)
    28     , typename BOOST_MPL_AUX_NA_PARAM(F1)
    29     , typename BOOST_MPL_AUX_NA_PARAM(F2)
    30     >
    31 struct eval_if
    32 #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) \
    33      || ( BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, >= 0x0300) \
    34         && BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, BOOST_TESTED_AT(0x0304)) \
    35         )
    36 {
    37     typedef typename if_<C,F1,F2>::type f_;
    38     typedef typename f_::type type;
    39 #else
    40     : if_<C,F1,F2>::type
    41 {
    42 #endif
    43     BOOST_MPL_AUX_LAMBDA_SUPPORT(3,eval_if,(C,F1,F2))
    44 };
    45 
    46 // (almost) copy & paste in order to save one more 
    47 // recursively nested template instantiation to user
    48 template<
    49       bool C
    50     , typename F1
    51     , typename F2
    52     >
    53 struct eval_if_c
    54 #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) \
    55      || ( BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, >= 0x0300) \
    56         && BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, BOOST_TESTED_AT(0x0304)) \
    57         )
    58 {
    59     typedef typename if_c<C,F1,F2>::type f_;
    60     typedef typename f_::type type;
    61 #else
    62     : if_c<C,F1,F2>::type
    63 {
    64 #endif
    65 };
    66 
    67 BOOST_MPL_AUX_NA_SPEC(3, eval_if)
    68 
    69 }}
    70 
    71 #endif // BOOST_MPL_EVAL_IF_HPP_INCLUDED