1
2// (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes,
3// Howard Hinnant and John Maddock 2000.
4// (C) Copyright Mat Marcus, Jesse Jones and Adobe Systems Inc 2001
5
6// Use, modification and distribution are subject to the Boost Software License,
7// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
8// http://www.boost.org/LICENSE_1_0.txt).
9//
10// See http://www.boost.org/libs/type_traits for most recent version including documentation.
11
12// Fixed is_pointer, is_lvalue_reference, is_const, is_volatile, is_same,
13// is_member_pointer based on the Simulated Partial Specialization work
14// of Mat Marcus and Jesse Jones. See http://opensource.adobe.com or
15// http://groups.yahoo.com/group/boost/message/5441
16// Some workarounds in here use ideas suggested from "Generic<Programming>:
17// Mappings between Types and Values"
18// by Andrei Alexandrescu (see http://www.cuj.com/experts/1810/alexandr.html).
19
20
21#ifndef BOOST_TT_IS_LVALUE_REFERENCE_HPP_INCLUDED
22#define BOOST_TT_IS_LVALUE_REFERENCE_HPP_INCLUDED
23
24#include <boost/type_traits/config.hpp>
25
26
27// should be the last #include
28#include <boost/type_traits/detail/bool_trait_def.hpp>
29
30namespace boost {
31
32#if defined( __CODEGEARC__ )
33BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_lvalue_reference,T,__is_reference(T))
34#else
35
36BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_lvalue_reference,T,false)
37BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_lvalue_reference,T&,true)
38
39#if defined(BOOST_ILLEGAL_CV_REFERENCES)
40// these are illegal specialisations; cv-qualifies applied to
41// references have no effect according to [8.3.2p1],
42// C++ Builder requires them though as it treats cv-qualified
43// references as distinct types...
44BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_lvalue_reference,T& const,true)
45BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_lvalue_reference,T& volatile,true)
46BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_lvalue_reference,T& const volatile,true)
47#endif
48
49#endif
50
51} // namespace boost
52
53#include <boost/type_traits/detail/bool_trait_undef.hpp>
54
55#endif // BOOST_TT_IS_REFERENCE_HPP_INCLUDED
56
57