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      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 
     12 // class match_results<BidirectionalIterator, Allocator>
     13 
     14 // string_type
     15 //   format(const char_type* fmt,
     16 //          regex_constants::match_flag_type flags = regex_constants::format_default) const;
     17 
     18 #include <iostream>
     19 
     20 #include <regex>
     21 #include <cassert>
     22 #include "test_macros.h"
     23 
     24 int main()
     25 {
     26     {
     27         std::match_results<const char*> m;
     28         const char s[] = "abcdefghijk";
     29         assert(std::regex_search(s, m, std::regex("cd((e)fg)hi")));
     30 
     31         const char fmt[] = "prefix: $`, match: $&, suffix: $', m[1]: $1, m[2]: $2";
     32         std::string out = m.format(fmt);
     33         assert(out == "prefix: ab, match: cdefghi, suffix: jk, m[1]: efg, m[2]: e");
     34     }
     35     {
     36         std::match_results<const char*> m;
     37         const char s[] = "abcdefghijk";
     38         assert(std::regex_search(s, m, std::regex("cd((e)fg)hi")));
     39 
     40         const char fmt[] = "prefix: $`, match: $&, suffix: $', m[1]: $1, m[2]: $2";
     41         std::string out = m.format(fmt, std::regex_constants::format_sed);
     42         assert(out == "prefix: $`, match: $cdefghi, suffix: $', m[1]: $1, m[2]: $2");
     43     }
     44     {
     45         std::match_results<const char*> m;
     46         const char s[] = "abcdefghijk";
     47         assert(std::regex_search(s, m, std::regex("cd((e)fg)hi")));
     48 
     49         const char fmt[] = "match: &, m[1]: \\1, m[2]: \\2";
     50         std::string out = m.format(fmt, std::regex_constants::format_sed);
     51         assert(out == "match: cdefghi, m[1]: efg, m[2]: e");
     52     }
     53 
     54     {
     55         std::match_results<const wchar_t*> m;
     56         const wchar_t s[] = L"abcdefghijk";
     57         assert(std::regex_search(s, m, std::wregex(L"cd((e)fg)hi")));
     58 
     59         const wchar_t fmt[] = L"prefix: $`, match: $&, suffix: $', m[1]: $1, m[2]: $2";
     60         std::wstring out = m.format(fmt);
     61         assert(out == L"prefix: ab, match: cdefghi, suffix: jk, m[1]: efg, m[2]: e");
     62     }
     63     {
     64         std::match_results<const wchar_t*> m;
     65         const wchar_t s[] = L"abcdefghijk";
     66         assert(std::regex_search(s, m, std::wregex(L"cd((e)fg)hi")));
     67 
     68         const wchar_t fmt[] = L"prefix: $`, match: $&, suffix: $', m[1]: $1, m[2]: $2";
     69         std::wstring out = m.format(fmt, std::regex_constants::format_sed);
     70         assert(out == L"prefix: $`, match: $cdefghi, suffix: $', m[1]: $1, m[2]: $2");
     71     }
     72     {
     73         std::match_results<const wchar_t*> m;
     74         const wchar_t s[] = L"abcdefghijk";
     75         assert(std::regex_search(s, m, std::wregex(L"cd((e)fg)hi")));
     76 
     77         const wchar_t fmt[] = L"match: &, m[1]: \\1, m[2]: \\2";
     78         std::wstring out = m.format(fmt, std::regex_constants::format_sed);
     79         assert(out == L"match: cdefghi, m[1]: efg, m[2]: e");
     80     }
     81 }
     82