libcxx/test/std/re/re.const/re.matchflag/match_not_bol.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <regex>
  10
  11 // match_not_bol:
  12 //     The first character in the sequence [first,last) shall be treated as
  13 //     though it is not at the beginning of a line, so the character ^ in the
  14 //     regular expression shall not match [first,first).
  15
  16 #include <regex>
  17 #include <cassert>
  18 #include "test_macros.h"
  19
  20 int main(int, char**)
  21 {
  22     {
  23     std::string target = "foo";
  24     std::regex re("^foo");
  25     assert( std::regex_match(target, re));
  26     assert(!std::regex_match(target, re, std::regex_constants::match_not_bol));
  27     }
  28
  29     {
  30     std::string target = "foo";
  31     std::regex re("foo");
  32     assert( std::regex_match(target, re));
  33     assert( std::regex_match(target, re, std::regex_constants::match_not_bol));
  34     }
  35
  36     {
  37     std::string target = "fooby";
  38     std::regex re("^foo");
  39     assert( std::regex_search(target, re));
  40     assert(!std::regex_search(target, re, std::regex_constants::match_not_bol));
  41     }
  42
  43     {
  44     std::string target = "fooby";
  45     std::regex re("foo");
  46     assert( std::regex_search(target, re));
  47     assert( std::regex_search(target, re, std::regex_constants::match_not_bol));
  48     }
  49
  50   return 0;
  51 }