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_EXPECT_FUNCTION_APR_29_2007_0558PM)
8#define SPIRIT_EXPECT_FUNCTION_APR_29_2007_0558PM
9
10#if defined(_MSC_VER)
11#pragma once
12#endif
13
14#include <boost/spirit/home/support/unused.hpp>
15#include <boost/spirit/home/support/multi_pass_wrapper.hpp>
16#include <boost/throw_exception.hpp>
17
18namespace boost { namespace spirit { namespace qi { namespace detail
19{
20 template <
21 typename Iterator, typename Context
22 , typename Skipper, typename Exception>
23 struct expect_function
24 {
25 typedef Iterator iterator_type;
26 typedef Context context_type;
27
28 expect_function(
29 Iterator& first_, Iterator const& last_
30 , Context& context_, Skipper const& skipper_)
31 : first(first_)
32 , last(last_)
33 , context(context_)
34 , skipper(skipper_)
35 , is_first(true)
36 {
37 }
38
39 template <typename Component, typename Attribute>
40 bool operator()(Component const& component, Attribute& attr) const
41 {
42 // if this is not the first component in the expect chain we
43 // need to flush any multi_pass iterator we might be acting on
44 if (!is_first)
45 spirit::traits::clear_queue(first);
46
47 // if we are testing the first component in the sequence,
48 // return true if the parser fails, if this is not the first
49 // component, throw exception if the parser fails
50 if (!component.parse(first, last, context, skipper, attr))
51 {
52 if (is_first)
53 {
54 is_first = false;
55 return true; // true means the match failed
56 }
57 boost::throw_exception(Exception(first, last, component.what(context)));
58#if defined(BOOST_NO_EXCEPTIONS)
59 return true; // for systems not supporting exceptions
60#endif
61 }
62 is_first = false;
63 return false;
64 }
65
66 template <typename Component>
67 bool operator()(Component const& component) const
68 {
69 // if this is not the first component in the expect chain we
70 // need to flush any multi_pass iterator we might be acting on
71 if (!is_first)
72 spirit::traits::clear_queue(first);
73
74 // if we are testing the first component in the sequence,
75 // return true if the parser fails, if this not the first
76 // component, throw exception if the parser fails
77 if (!component.parse(first, last, context, skipper, unused))
78 {
79 if (is_first)
80 {
81 is_first = false;
82 return true;
83 }
84 boost::throw_exception(Exception(first, last, component.what(context)));
85#if defined(BOOST_NO_EXCEPTIONS)
86 return false; // for systems not supporting exceptions
87#endif
88 }
89 is_first = false;
90 return false;
91 }
92
93 Iterator& first;
94 Iterator const& last;
95 Context& context;
96 Skipper const& skipper;
97 mutable bool is_first;
98
99 private:
100 // silence MSVC warning C4512: assignment operator could not be generated
101 expect_function& operator= (expect_function const&);
102 };
103}}}}
104
105#endif
106

source code of qtlocation/src/3rdparty/mapbox-gl-native/deps/boost/1.65.1/include/boost/spirit/home/qi/detail/expect_function.hpp