/src/Fast-DDS/thirdparty/taocpp-pegtl/pegtl/internal/istring.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_INTERNAL_ISTRING_HPP |
5 | | #define TAO_PEGTL_INTERNAL_ISTRING_HPP |
6 | | |
7 | | #include <type_traits> |
8 | | |
9 | | #include "../config.hpp" |
10 | | |
11 | | #include "bump_help.hpp" |
12 | | #include "result_on_found.hpp" |
13 | | #include "skip_control.hpp" |
14 | | #include "trivial.hpp" |
15 | | |
16 | | #include "../analysis/counted.hpp" |
17 | | |
18 | | namespace tao |
19 | | { |
20 | | namespace TAO_PEGTL_NAMESPACE |
21 | | { |
22 | | namespace internal |
23 | | { |
24 | | template< char C > |
25 | | using is_alpha = std::integral_constant< bool, ( ( 'a' <= C ) && ( C <= 'z' ) ) || ( ( 'A' <= C ) && ( C <= 'Z' ) ) >; |
26 | | |
27 | | template< char C, bool A = is_alpha< C >::value > |
28 | | struct ichar_equal; |
29 | | |
30 | | template< char C > |
31 | | struct ichar_equal< C, true > |
32 | | { |
33 | | static bool match( const char c ) noexcept |
34 | | { |
35 | | return ( C | 0x20 ) == ( c | 0x20 ); |
36 | | } |
37 | | }; |
38 | | |
39 | | template< char C > |
40 | | struct ichar_equal< C, false > |
41 | | { |
42 | | static bool match( const char c ) noexcept |
43 | | { |
44 | | return c == C; |
45 | | } |
46 | | }; |
47 | | |
48 | | template< char... Cs > |
49 | | struct istring_equal; |
50 | | |
51 | | template<> |
52 | | struct istring_equal<> |
53 | | { |
54 | | static bool match( const char* /*unused*/ ) noexcept |
55 | 0 | { |
56 | 0 | return true; |
57 | 0 | } |
58 | | }; |
59 | | |
60 | | template< char C, char... Cs > |
61 | | struct istring_equal< C, Cs... > |
62 | | { |
63 | | static bool match( const char* r ) noexcept |
64 | | { |
65 | | return ichar_equal< C >::match( *r ) && istring_equal< Cs... >::match( r + 1 ); |
66 | | } |
67 | | }; |
68 | | |
69 | | template< char... Cs > |
70 | | struct istring; |
71 | | |
72 | | template<> |
73 | | struct istring<> |
74 | | : trivial< true > |
75 | | { |
76 | | }; |
77 | | |
78 | | template< char... Cs > |
79 | | struct istring |
80 | | { |
81 | | using analyze_t = analysis::counted< analysis::rule_type::any, sizeof...( Cs ) >; |
82 | | |
83 | | template< typename Input > |
84 | | static bool match( Input& in ) noexcept( noexcept( in.size( 0 ) ) ) |
85 | | { |
86 | | if( in.size( sizeof...( Cs ) ) >= sizeof...( Cs ) ) { |
87 | | if( istring_equal< Cs... >::match( in.current() ) ) { |
88 | | bump_help< result_on_found::success, Input, char, Cs... >( in, sizeof...( Cs ) ); |
89 | | return true; |
90 | | } |
91 | | } |
92 | | return false; |
93 | | } |
94 | | }; |
95 | | |
96 | | template< char... Cs > |
97 | | struct skip_control< istring< Cs... > > : std::true_type |
98 | | { |
99 | | }; |
100 | | |
101 | | } // namespace internal |
102 | | |
103 | | } // namespace TAO_PEGTL_NAMESPACE |
104 | | |
105 | | } // namespace tao |
106 | | |
107 | | #endif |