Home | History | Annotate | Download | only in re.regex.construct 
      1 //===----------------------------------------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is dual licensed under the MIT and the University of Illinois Open
      6 // Source Licenses. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 // <regex>
     11 // UNSUPPORTED: c++98, c++03, c++11, c++14
     12 // UNSUPPORTED: libcpp-no-deduction-guides
     13 
     14 
     15 // template<class ForwardIterator>
     16 // basic_regex(ForwardIterator, ForwardIterator,
     17 //             regex_constants::syntax_option_type = regex_constants::ECMAScript)
     18 // -> basic_regex<typename iterator_traits<ForwardIterator>::value_type>;
     19 
     20 
     21 #include <regex>
     22 #include <string>
     23 #include <iterator>
     24 #include <cassert>
     25 #include <cstddef>
     26 
     27 #include "test_macros.h"
     28 #include "test_iterators.h"
     29 #include "test_allocator.h"
     30 
     31 using namespace std::literals;
     32 
     33 struct A {};
     34 
     35 int main()
     36 {
     37 
     38 //  Test the explicit deduction guides
     39     {
     40 //  basic_regex(ForwardIterator, ForwardIterator)
     41     std::string s1("\\(a\\)");
     42     std::basic_regex re(s1.begin(), s1.end());
     43 
     44     static_assert(std::is_same_v<decltype(re), std::basic_regex<char>>, "");
     45     assert(re.flags() == std::regex_constants::ECMAScript);
     46     assert(re.mark_count() == 0);
     47     }
     48 
     49     {
     50     std::wstring s1(L"\\(a\\)");
     51     std::basic_regex re(s1.begin(), s1.end(), std::regex_constants::basic);
     52 
     53     static_assert(std::is_same_v<decltype(re), std::basic_regex<wchar_t>>, "");
     54     assert(re.flags() == std::regex_constants::basic);
     55     assert(re.mark_count() == 1);
     56     }
     57 
     58 //  Test the implicit deduction guides
     59     {
     60 //  basic_regex(string);
     61     std::basic_regex re("(a([bc]))"s);
     62     static_assert(std::is_same_v<decltype(re), std::basic_regex<char>>, "");
     63     assert(re.flags() == std::regex_constants::ECMAScript);
     64     assert(re.mark_count() == 2);
     65     }
     66 
     67     {
     68 //  basic_regex(string, flag_type);
     69     std::basic_regex re(L"(a([bc]))"s, std::regex_constants::awk);
     70     static_assert(std::is_same_v<decltype(re), std::basic_regex<wchar_t>>, "");
     71     assert(re.flags() == std::regex_constants::awk);
     72     assert(re.mark_count() == 2);
     73     }
     74 
     75     {
     76 //  basic_regex(const charT*);
     77     std::basic_regex re("ABCDE");
     78     static_assert(std::is_same_v<decltype(re), std::basic_regex<char>>, "");
     79     assert(re.flags() == std::regex_constants::ECMAScript);
     80     assert(re.mark_count() == 0);
     81     }
     82 
     83     {
     84 //  basic_regex(const charT*, flag_type);
     85     std::basic_regex re(L"ABCDE", std::regex_constants::grep);
     86     static_assert(std::is_same_v<decltype(re), std::basic_regex<wchar_t>>, "");
     87     assert(re.flags() == std::regex_constants::grep);
     88     assert(re.mark_count() == 0);
     89     }
     90 
     91     {
     92 //  basic_regex(const charT*, size_t);
     93     std::basic_regex re("ABCDEDEF", 7);
     94     static_assert(std::is_same_v<decltype(re), std::basic_regex<char>>, "");
     95     assert(re.flags() == std::regex_constants::ECMAScript);
     96     assert(re.mark_count() == 0);
     97     }
     98 
     99     {
    100 //  basic_regex(const charT*, size_t, flag_type);
    101     std::basic_regex re(L"ABCDEDEF", 8, std::regex_constants::awk);
    102     static_assert(std::is_same_v<decltype(re), std::basic_regex<wchar_t>>, "");
    103     assert(re.flags() == std::regex_constants::awk);
    104     assert(re.mark_count() == 0);
    105     }
    106 
    107     {
    108 //  basic_regex(const basic_regex &);
    109     std::basic_regex<char> source;
    110     std::basic_regex re(source);
    111     static_assert(std::is_same_v<decltype(re), std::basic_regex<char>>, "");
    112     assert(re.flags() == source.flags());
    113     assert(re.mark_count() == source.mark_count());
    114     }
    115 
    116     {
    117 //  template<class ST, class SA>
    118 //         explicit basic_regex(const basic_string<charT, ST, SA>& p,
    119 //                              flag_type f = regex_constants::ECMAScript);
    120     }
    121 
    122     {
    123 //  basic_regex(initializer_list);
    124     std::basic_regex re({'A', 'B', 'F', 'E', 'D'});
    125     static_assert(std::is_same_v<decltype(re), std::basic_regex<char>>, "");
    126     assert(re.flags() == std::regex_constants::ECMAScript);
    127     assert(re.mark_count() == 0);
    128     }
    129 
    130     {
    131 //  basic_regex(initializer_list, flag_type);
    132     std::basic_regex re({L'A', L'B', L'F', L'E', L'D'}, std::regex_constants::grep);
    133     static_assert(std::is_same_v<decltype(re), std::basic_regex<wchar_t>>, "");
    134     assert(re.flags() == std::regex_constants::grep);
    135     assert(re.mark_count() == 0);
    136     }
    137 }
    138