You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
241 lines
7.9 KiB
241 lines
7.9 KiB
///////////////////////////////////////////////////////////////////////////////
|
|
// transmogrify.hpp
|
|
//
|
|
// Copyright 2008 Eric Niebler. Distributed under the Boost
|
|
// Software License, Version 1.0. (See accompanying file
|
|
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
|
|
#ifndef BOOST_XPRESSIVE_DETAIL_STATIC_TRANSMOGRIFY_HPP_EAN_10_04_2005
|
|
#define BOOST_XPRESSIVE_DETAIL_STATIC_TRANSMOGRIFY_HPP_EAN_10_04_2005
|
|
|
|
// MS compatible compilers support #pragma once
|
|
#if defined(_MSC_VER)
|
|
# pragma once
|
|
#endif
|
|
|
|
#include <cstring> // for std::strlen
|
|
#include <boost/mpl/if.hpp>
|
|
#include <boost/mpl/or.hpp>
|
|
#include <boost/mpl/bool.hpp>
|
|
#include <boost/mpl/assert.hpp>
|
|
#include <boost/type_traits/is_same.hpp>
|
|
#include <boost/xpressive/detail/detail_fwd.hpp>
|
|
#include <boost/xpressive/detail/core/matchers.hpp>
|
|
#include <boost/xpressive/detail/static/placeholders.hpp>
|
|
#include <boost/xpressive/detail/utility/dont_care.hpp>
|
|
#include <boost/xpressive/detail/utility/traits_utils.hpp>
|
|
|
|
namespace boost { namespace xpressive { namespace detail
|
|
{
|
|
template<typename T, typename Char>
|
|
struct is_char_literal
|
|
: mpl::or_<is_same<T, Char>, is_same<T, char> >
|
|
{};
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// transmogrify
|
|
//
|
|
template<typename BidiIter, typename ICase, typename Traits, typename Matcher, typename EnableIf = void>
|
|
struct default_transmogrify
|
|
{
|
|
typedef typename Traits::char_type char_type;
|
|
typedef typename Traits::string_type string_type;
|
|
|
|
typedef typename mpl::if_c
|
|
<
|
|
is_char_literal<Matcher, char_type>::value
|
|
, literal_matcher<Traits, ICase, mpl::false_>
|
|
, string_matcher<Traits, ICase>
|
|
>::type type;
|
|
|
|
template<typename Matcher2, typename Visitor>
|
|
static type call(Matcher2 const &m, Visitor &visitor)
|
|
{
|
|
return default_transmogrify::call_(m, visitor, is_char_literal<Matcher2, char_type>());
|
|
}
|
|
|
|
template<typename Matcher2, typename Visitor>
|
|
static type call_(Matcher2 const &m, Visitor &visitor, mpl::true_)
|
|
{
|
|
char_type ch = char_cast<char_type>(m, visitor.traits());
|
|
return type(ch, visitor.traits());
|
|
}
|
|
|
|
template<typename Matcher2, typename Visitor>
|
|
static type call_(Matcher2 const &m, Visitor &visitor, mpl::false_)
|
|
{
|
|
string_type str = string_cast<string_type>(m, visitor.traits());
|
|
return type(str, visitor.traits());
|
|
}
|
|
};
|
|
|
|
template<typename BidiIter, typename ICase, typename Traits, typename Matcher>
|
|
struct default_transmogrify<BidiIter, ICase, Traits, Matcher, typename Matcher::is_boost_xpressive_xpression_>
|
|
{
|
|
typedef Matcher type;
|
|
|
|
template<typename Matcher2>
|
|
static Matcher2 const &call(Matcher2 const &m, dont_care)
|
|
{
|
|
return m;
|
|
}
|
|
};
|
|
|
|
template<typename BidiIter, typename ICase, typename Traits, typename Matcher>
|
|
struct transmogrify
|
|
: default_transmogrify<BidiIter, ICase, Traits, Matcher>
|
|
{};
|
|
|
|
template<typename BidiIter, typename ICase, typename Traits>
|
|
struct transmogrify<BidiIter, ICase, Traits, assert_bol_placeholder >
|
|
{
|
|
typedef assert_bol_matcher<Traits> type;
|
|
|
|
template<typename Matcher2, typename Visitor>
|
|
static type call(Matcher2, Visitor &visitor)
|
|
{
|
|
return type(visitor.traits());
|
|
}
|
|
};
|
|
|
|
template<typename BidiIter, typename ICase, typename Traits>
|
|
struct transmogrify<BidiIter, ICase, Traits, assert_eol_placeholder >
|
|
{
|
|
typedef assert_eol_matcher<Traits> type;
|
|
|
|
template<typename Matcher2, typename Visitor>
|
|
static type call(Matcher2, Visitor &visitor)
|
|
{
|
|
return type(visitor.traits());
|
|
}
|
|
};
|
|
|
|
template<typename BidiIter, typename ICase, typename Traits>
|
|
struct transmogrify<BidiIter, ICase, Traits, logical_newline_placeholder >
|
|
{
|
|
typedef logical_newline_matcher<Traits> type;
|
|
|
|
template<typename Matcher2, typename Visitor>
|
|
static type call(Matcher2, Visitor &visitor)
|
|
{
|
|
return type(visitor.traits());
|
|
}
|
|
};
|
|
|
|
template<typename BidiIter, typename ICase, typename Traits, typename Char>
|
|
struct transmogrify<BidiIter, ICase, Traits, range_placeholder<Char> >
|
|
{
|
|
// By design, we don't widen character ranges.
|
|
typedef typename iterator_value<BidiIter>::type char_type;
|
|
BOOST_MPL_ASSERT((is_same<Char, char_type>));
|
|
typedef range_matcher<Traits, ICase> type;
|
|
|
|
template<typename Matcher2, typename Visitor>
|
|
static type call(Matcher2 const &m, Visitor &visitor)
|
|
{
|
|
return type(m.ch_min_, m.ch_max_, m.not_, visitor.traits());
|
|
}
|
|
};
|
|
|
|
template<typename BidiIter, typename ICase, typename Traits>
|
|
struct transmogrify<BidiIter, ICase, Traits, mark_placeholder >
|
|
{
|
|
typedef mark_matcher<Traits, ICase> type;
|
|
|
|
template<typename Matcher2, typename Visitor>
|
|
static type call(Matcher2 const &m, Visitor &visitor)
|
|
{
|
|
return type(m.mark_number_, visitor.traits());
|
|
}
|
|
};
|
|
|
|
template<typename BidiIter, typename ICase, typename Traits>
|
|
struct transmogrify<BidiIter, ICase, Traits, posix_charset_placeholder >
|
|
{
|
|
typedef posix_charset_matcher<Traits> type;
|
|
|
|
template<typename Matcher2, typename Visitor>
|
|
static type call(Matcher2 const &m, Visitor &visitor)
|
|
{
|
|
char const *name_end = m.name_ + std::strlen(m.name_);
|
|
return type(visitor.traits().lookup_classname(m.name_, name_end, ICase::value), m.not_);
|
|
}
|
|
};
|
|
|
|
template<typename BidiIter, typename Traits, typename Size>
|
|
struct transmogrify<BidiIter, mpl::true_, Traits, set_matcher<Traits, Size> >
|
|
{
|
|
typedef set_matcher<Traits, Size> type;
|
|
|
|
template<typename Matcher2, typename Visitor>
|
|
static type call(Matcher2 m, Visitor &visitor)
|
|
{
|
|
m.nocase(visitor.traits());
|
|
return m;
|
|
}
|
|
};
|
|
|
|
template<typename BidiIter, typename ICase, typename Traits, typename Cond>
|
|
struct transmogrify<BidiIter, ICase, Traits, assert_word_placeholder<Cond> >
|
|
{
|
|
typedef assert_word_matcher<Cond, Traits> type;
|
|
|
|
template<typename Visitor>
|
|
static type call(dont_care, Visitor &visitor)
|
|
{
|
|
return type(visitor.traits());
|
|
}
|
|
};
|
|
|
|
template<typename BidiIter, typename ICase, typename Traits>
|
|
struct transmogrify<BidiIter, ICase, Traits, reference_wrapper<basic_regex<BidiIter> > >
|
|
{
|
|
typedef regex_byref_matcher<BidiIter> type;
|
|
|
|
template<typename Matcher2>
|
|
static type call(Matcher2 const &m, dont_care)
|
|
{
|
|
return type(detail::core_access<BidiIter>::get_regex_impl(m.get()));
|
|
}
|
|
};
|
|
|
|
template<typename BidiIter, typename ICase, typename Traits>
|
|
struct transmogrify<BidiIter, ICase, Traits, reference_wrapper<basic_regex<BidiIter> const> >
|
|
{
|
|
typedef regex_byref_matcher<BidiIter> type;
|
|
|
|
template<typename Matcher2>
|
|
static type call(Matcher2 const &m, dont_care)
|
|
{
|
|
return type(detail::core_access<BidiIter>::get_regex_impl(m.get()));
|
|
}
|
|
};
|
|
|
|
template<typename BidiIter, typename ICase, typename Traits>
|
|
struct transmogrify<BidiIter, ICase, Traits, tracking_ptr<regex_impl<BidiIter> > >
|
|
{
|
|
typedef regex_matcher<BidiIter> type;
|
|
|
|
template<typename Matcher2>
|
|
static type call(Matcher2 const &m, dont_care)
|
|
{
|
|
return type(m.get());
|
|
}
|
|
};
|
|
|
|
template<typename BidiIter, typename ICase, typename Traits>
|
|
struct transmogrify<BidiIter, ICase, Traits, self_placeholder >
|
|
{
|
|
typedef regex_byref_matcher<BidiIter> type;
|
|
|
|
template<typename Matcher2, typename Visitor>
|
|
static type call(Matcher2, Visitor &visitor)
|
|
{
|
|
return type(visitor.self());
|
|
}
|
|
};
|
|
|
|
}}}
|
|
|
|
#endif
|