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

   1 // -*- C++ -*-
   2 //===----------------------------------------------------------------------===//
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 // <regex>
  11
  12 // match_not_bol:
  13 //     The first character in the sequence [first,last) shall be treated as
  14 //     though it is not at the beginning of a line, so the character ^ in the
  15 //     regular expression shall not match [first,first).
  16
  17 #include <regex>
  18 #include <cassert>
  19 #include "test_macros.h"
  20
  21 int main(int, char**)
  22 {
  23     {
  24     std::string target = "foo";
  25     std::regex re("^foo");
  26     assert( std::regex_match(target, re));
  27     assert(!std::regex_match(target, re, std::regex_constants::match_not_bol));
  28     }
  29
  30     {
  31     std::string target = "foo";
  32     std::regex re("foo");
  33     assert( std::regex_match(target, re));
  34     assert( std::regex_match(target, re, std::regex_constants::match_not_bol));
  35     }
  36
  37     {
  38     std::string target = "fooby";
  39     std::regex re("^foo");
  40     assert( std::regex_search(target, re));
  41     assert(!std::regex_search(target, re, std::regex_constants::match_not_bol));
  42     }
  43
  44     {
  45     std::string target = "fooby";
  46     std::regex re("foo");
  47     assert( std::regex_search(target, re));
  48     assert( std::regex_search(target, re, std::regex_constants::match_not_bol));
  49     }
  50
  51   return 0;
  52 }