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Changed constructor templates to be generated with the Preprocessor library; added a control macro for the maximum constructor argument length

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[SVN r24799]
This commit is contained in:
Daryle Walker
2004-08-28 20:24:17 +00:00
parent b0baebeb0a
commit f2116413d6
2 changed files with 63 additions and 58 deletions
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include/boost/utility/base_from_member.hpp
+44 -56
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@@ -10,6 +10,44 @@
#define BOOST_UTILITY_BASE_FROM_MEMBER_HPP
#include <boost/utility_fwd.hpp> // required for parameter defaults
#include <boost/preprocessor/arithmetic/inc.hpp>
#include <boost/preprocessor/repetition/enum_binary_params.hpp>
#include <boost/preprocessor/repetition/enum_params.hpp>
#include <boost/preprocessor/repetition/repeat_from_to.hpp>
// Base-from-member arity configuration macro ------------------------------//
// The following macro determines how many arguments will be in the largest
// constructor template of base_from_member. Constructor templates will be
// generated from one argument to this maximum. Code from other files can read
// this number if they need to always match the exact maximum base_from_member
// uses. The maximum constructor length can be changed by overriding the
// #defined constant. Make sure to apply the override, if any, for all source
// files during project compiling for consistency.
// Contributed by Jonathan Turkanis
#ifndef BOOST_BASE_FROM_MEMBER_MAX_ARITY
#define BOOST_BASE_FROM_MEMBER_MAX_ARITY 10
#endif
// An iteration of a constructor template for base_from_member -------------//
// A macro that should expand to:
// template < typename T1, ..., typename Tn >
// base_from_member( T1 x1, ..., Tn xn )
// : member( x1, ..., xn )
// {}
// This macro should only persist within this file.
#define BOOST_PRIVATE_CTR_DEF( z, n, data ) \
template < BOOST_PP_ENUM_PARAMS(n, typename T) > \
explicit base_from_member( BOOST_PP_ENUM_BINARY_PARAMS(n, T, x) ) \
: member( BOOST_PP_ENUM_PARAMS(n, x) ) \
{} \
/**/
namespace boost
@@ -34,66 +72,16 @@ protected:
: member()
{}
template< typename T1 >
explicit base_from_member( T1 x1 )
: member( x1 )
{}
template< typename T1, typename T2 >
base_from_member( T1 x1, T2 x2 )
: member( x1, x2 )
{}
template< typename T1, typename T2, typename T3 >
base_from_member( T1 x1, T2 x2, T3 x3 )
: member( x1, x2, x3 )
{}
template< typename T1, typename T2, typename T3, typename T4 >
base_from_member( T1 x1, T2 x2, T3 x3, T4 x4 )
: member( x1, x2, x3, x4 )
{}
template< typename T1, typename T2, typename T3, typename T4, typename T5 >
base_from_member( T1 x1, T2 x2, T3 x3, T4 x4, T5 x5 )
: member( x1, x2, x3, x4, x5 )
{}
template< typename T1, typename T2, typename T3, typename T4, typename T5,
typename T6 >
base_from_member( T1 x1, T2 x2, T3 x3, T4 x4, T5 x5, T6 x6 )
: member( x1, x2, x3, x4, x5, x6 )
{}
template< typename T1, typename T2, typename T3, typename T4, typename T5,
typename T6, typename T7 >
base_from_member( T1 x1, T2 x2, T3 x3, T4 x4, T5 x5, T6 x6, T7 x7 )
: member( x1, x2, x3, x4, x5, x6, x7 )
{}
template< typename T1, typename T2, typename T3, typename T4, typename T5,
typename T6, typename T7, typename T8 >
base_from_member( T1 x1, T2 x2, T3 x3, T4 x4, T5 x5, T6 x6, T7 x7, T8 x8 )
: member( x1, x2, x3, x4, x5, x6, x7, x8 )
{}
template< typename T1, typename T2, typename T3, typename T4, typename T5,
typename T6, typename T7, typename T8, typename T9 >
base_from_member( T1 x1, T2 x2, T3 x3, T4 x4, T5 x5, T6 x6, T7 x7, T8 x8,
T9 x9 )
: member( x1, x2, x3, x4, x5, x6, x7, x8, x9 )
{}
template< typename T1, typename T2, typename T3, typename T4, typename T5,
typename T6, typename T7, typename T8, typename T9, typename T10 >
base_from_member( T1 x1, T2 x2, T3 x3, T4 x4, T5 x5, T6 x6, T7 x7, T8 x8,
T9 x9, T10 x10 )
: member( x1, x2, x3, x4, x5, x6, x7, x8, x9, x10 )
{}
BOOST_PP_REPEAT_FROM_TO( 1, BOOST_PP_INC(BOOST_BASE_FROM_MEMBER_MAX_ARITY),
BOOST_PRIVATE_CTR_DEF, _ )
}; // boost::base_from_member
} // namespace boost
// Undo any private macros
#undef BOOST_PRIVATE_CTR_DEF
#endif // BOOST_UTILITY_BASE_FROM_MEMBER_HPP