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 // template <class BidirectionalIterator, class Allocator, class charT, class traits> 13 // bool 14 // regex_match(BidirectionalIterator first, BidirectionalIterator last, 15 // match_results<BidirectionalIterator, Allocator>& m, 16 // const basic_regex<charT, traits>& e, 17 // regex_constants::match_flag_type flags = regex_constants::match_default); 18 19 // std::regex in ECMAScript mode should not ignore capture groups inside lookahead assertions. 20 // For example, matching /(?=(a))(a)/ to "a" should yield two captures: \1 = "a", \2 = "a" 21 22 #include <regex> 23 #include <cassert> 24 25 #include "test_iterators.h" 26 27 int main() 28 { 29 { 30 std::regex re("^(?=(.))a$"); 31 assert(re.mark_count() == 1); 32 33 std::string s("a"); 34 std::smatch m; 35 assert(std::regex_match(s, m, re)); 36 assert(m.size() == 2); 37 assert(m[0] == "a"); 38 assert(m[1] == "a"); 39 } 40 41 { 42 std::regex re("^(a)(?=(.))(b)$"); 43 assert(re.mark_count() == 3); 44 45 std::string s("ab"); 46 std::smatch m; 47 assert(std::regex_match(s, m, re)); 48 assert(m.size() == 4); 49 assert(m[0] == "ab"); 50 assert(m[1] == "a"); 51 assert(m[2] == "b"); 52 assert(m[3] == "b"); 53 } 54 55 { 56 std::regex re("^(.)(?=(.)(?=.(.)))(...)$"); 57 assert(re.mark_count() == 4); 58 59 std::string s("abcd"); 60 std::smatch m; 61 assert(std::regex_match(s, m, re)); 62 assert(m.size() == 5); 63 assert(m[0] == "abcd"); 64 assert(m[1] == "a"); 65 assert(m[2] == "b"); 66 assert(m[3] == "d"); 67 assert(m[4] == "bcd"); 68 } 69 70 { 71 std::regex re("^(a)(?!([^b]))(.c)$"); 72 assert(re.mark_count() == 3); 73 74 std::string s("abc"); 75 std::smatch m; 76 assert(std::regex_match(s, m, re)); 77 assert(m.size() == 4); 78 assert(m[0] == "abc"); 79 assert(m[1] == "a"); 80 assert(m[2] == ""); 81 assert(m[3] == "bc"); 82 } 83 84 { 85 std::regex re("^(?!((b)))(?=(.))(?!(abc)).b$"); 86 assert(re.mark_count() == 4); 87 88 std::string s("ab"); 89 std::smatch m; 90 assert(std::regex_match(s, m, re)); 91 assert(m.size() == 5); 92 assert(m[0] == "ab"); 93 assert(m[1] == ""); 94 assert(m[2] == ""); 95 assert(m[3] == "a"); 96 assert(m[4] == ""); 97 } 98 } 99
