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1 | /////////////////////////////////////////////////////////////////////////////// | |
2 | // modifier.hpp | |
3 | // | |
4 | // Copyright 2008 Eric Niebler. Distributed under the Boost | |
5 | // Software License, Version 1.0. (See accompanying file | |
6 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
7 | ||
8 | #ifndef BOOST_XPRESSIVE_DETAIL_STATIC_MODIFIER_HPP_EAN_10_04_2005 | |
9 | #define BOOST_XPRESSIVE_DETAIL_STATIC_MODIFIER_HPP_EAN_10_04_2005 | |
10 | ||
11 | // MS compatible compilers support #pragma once | |
12 | #if defined(_MSC_VER) | |
13 | # pragma once | |
14 | # pragma warning(push) | |
15 | # pragma warning(disable : 4510) // default constructor could not be generated | |
16 | # pragma warning(disable : 4610) // user defined constructor required | |
17 | #endif | |
18 | ||
19 | #include <boost/xpressive/detail/detail_fwd.hpp> | |
20 | #include <boost/proto/traits.hpp> | |
21 | #include <boost/xpressive/regex_constants.hpp> | |
22 | ||
23 | namespace boost { namespace xpressive { namespace detail | |
24 | { | |
25 | ||
26 | /////////////////////////////////////////////////////////////////////////////// | |
27 | // modifier | |
28 | template<typename Modifier> | |
29 | struct modifier_op | |
30 | { | |
31 | typedef regex_constants::syntax_option_type opt_type; | |
32 | ||
33 | template<typename Expr> | |
34 | struct apply | |
35 | { | |
36 | typedef typename proto::binary_expr< | |
37 | modifier_tag | |
38 | , typename proto::terminal<Modifier>::type | |
39 | , typename proto::result_of::as_child<Expr const>::type | |
40 | >::type type; | |
41 | }; | |
42 | ||
43 | template<typename Expr> | |
44 | typename apply<Expr>::type const | |
45 | operator ()(Expr const &expr) const | |
46 | { | |
47 | typename apply<Expr>::type that = {{this->mod_}, proto::as_child(expr)}; | |
48 | return that; | |
49 | } | |
50 | ||
51 | operator opt_type() const | |
52 | { | |
53 | return this->opt_; | |
54 | } | |
55 | ||
56 | Modifier mod_; | |
57 | opt_type opt_; | |
58 | }; | |
59 | ||
60 | }}} | |
61 | ||
62 | #if defined(_MSC_VER) | |
63 | # pragma warning(pop) | |
64 | #endif | |
65 | ||
66 | #endif |