/src/Fast-DDS/thirdparty/taocpp-pegtl/pegtl/analysis/insert_guard.hpp
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1 | | // Copyright (c) 2014-2020 Dr. Colin Hirsch and Daniel Frey |
2 | | // Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/ |
3 | | |
4 | | #ifndef TAO_PEGTL_ANALYSIS_INSERT_GUARD_HPP |
5 | | #define TAO_PEGTL_ANALYSIS_INSERT_GUARD_HPP |
6 | | |
7 | | #include <utility> |
8 | | |
9 | | #include "../config.hpp" |
10 | | |
11 | | namespace tao |
12 | | { |
13 | | namespace TAO_PEGTL_NAMESPACE |
14 | | { |
15 | | namespace analysis |
16 | | { |
17 | | template< typename C > |
18 | | class insert_guard |
19 | | { |
20 | | public: |
21 | | insert_guard( C& container, const typename C::value_type& value ) |
22 | 0 | : m_i( container.insert( value ) ), |
23 | 0 | m_c( &container ) |
24 | 0 | { |
25 | 0 | } |
26 | | |
27 | | insert_guard( const insert_guard& ) = delete; |
28 | | |
29 | | insert_guard( insert_guard&& other ) noexcept |
30 | | : m_i( other.m_i ), |
31 | | m_c( other.m_c ) |
32 | | { |
33 | | other.m_c = nullptr; |
34 | | } |
35 | | |
36 | | ~insert_guard() |
37 | 0 | { |
38 | 0 | if( m_c && m_i.second ) { |
39 | 0 | m_c->erase( m_i.first ); |
40 | 0 | } |
41 | 0 | } |
42 | | |
43 | | void operator=( const insert_guard& ) = delete; |
44 | | void operator=( insert_guard&& ) = delete; |
45 | | |
46 | | explicit operator bool() const noexcept |
47 | 0 | { |
48 | 0 | return m_i.second; |
49 | 0 | } |
50 | | |
51 | | private: |
52 | | const std::pair< typename C::iterator, bool > m_i; |
53 | | C* m_c; |
54 | | }; |
55 | | |
56 | | template< typename C > |
57 | | insert_guard< C > make_insert_guard( C& container, const typename C::value_type& value ) |
58 | 0 | { |
59 | 0 | return insert_guard< C >( container, value ); |
60 | 0 | } |
61 | | |
62 | | } // namespace analysis |
63 | | |
64 | | } // namespace TAO_PEGTL_NAMESPACE |
65 | | |
66 | | } // namespace tao |
67 | | |
68 | | #endif |