projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | /*============================================================================= |
| 2 | Copyright (c) 2001-2011 Joel de Guzman | |
| 3 | ||
| 4 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
| 5 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
| 6 | =============================================================================*/ | |
| 7 | #if !defined(SPIRIT_PERMUTE_FUNCTION_MARCH_13_2007_1129AM) | |
| 8 | #define SPIRIT_PERMUTE_FUNCTION_MARCH_13_2007_1129AM | |
| 9 | ||
| 10 | #if defined(_MSC_VER) | |
| 11 | #pragma once | |
| 12 | #endif | |
| 13 | ||
| 14 | #include <boost/spirit/home/support/unused.hpp> | |
| 15 | #include <boost/optional.hpp> | |
| 16 | ||
| 17 | namespace boost { namespace spirit { namespace qi { namespace detail | |
| 18 | { | |
| 19 | template <typename Iterator, typename Context, typename Skipper> | |
| 20 | struct permute_function | |
| 21 | { | |
| 22 | permute_function( | |
| 23 | Iterator& first_, Iterator const& last_ | |
| 24 | , Context& context_, Skipper const& skipper_) | |
| 25 | : first(first_) | |
| 26 | , last(last_) | |
| 27 | , context(context_) | |
| 28 | , skipper(skipper_) | |
| 29 | { | |
| 30 | } | |
| 31 | ||
| 32 | template <typename Component, typename Attribute> | |
| 33 | bool operator()(Component const& component, Attribute& attr) | |
| 34 | { | |
| 35 | // return true if the parser succeeds and the slot is not yet taken | |
| 36 | if (!*taken && component.parse(first, last, context, skipper, attr)) | |
| 37 | { | |
| 38 | *taken = true; | |
| 39 | ++taken; | |
| 40 | return true; | |
| 41 | } | |
| 42 | ++taken; | |
| 43 | return false; | |
| 44 | } | |
| 45 | ||
| 46 | template <typename Component, typename Attribute> | |
| 47 | bool operator()(Component const& component, boost::optional<Attribute>& attr) | |
| 48 | { | |
| 49 | // return true if the parser succeeds and the slot is not yet taken | |
| 50 | Attribute val; | |
| 51 | if (!*taken && component.parse(first, last, context, skipper, val)) | |
| 52 | { | |
| 53 | attr = val; | |
| 54 | *taken = true; | |
| 55 | ++taken; | |
| 56 | return true; | |
| 57 | } | |
| 58 | ++taken; | |
| 59 | return false; | |
| 60 | } | |
| 61 | ||
| 62 | template <typename Component> | |
| 63 | bool operator()(Component const& component) | |
| 64 | { | |
| 65 | // return true if the parser succeeds and the slot is not yet taken | |
| 66 | if (!*taken && component.parse(first, last, context, skipper, unused)) | |
| 67 | { | |
| 68 | *taken = true; | |
| 69 | ++taken; | |
| 70 | return true; | |
| 71 | } | |
| 72 | ++taken; | |
| 73 | return false; | |
| 74 | } | |
| 75 | ||
| 76 | Iterator& first; | |
| 77 | Iterator const& last; | |
| 78 | Context& context; | |
| 79 | Skipper const& skipper; | |
| 80 | bool* taken; | |
| 81 | ||
| 82 | private: | |
| 83 | // silence MSVC warning C4512: assignment operator could not be generated | |
| 84 | permute_function& operator= (permute_function const&); | |
| 85 | }; | |
| 86 | }}}} | |
| 87 | ||
| 88 | #endif |