//===----------------------------------------------------------------------===// // // The LLVM Compiler Infrastructure // // This file is dual licensed under the MIT and the University of Illinois Open // Source Licenses. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // <regex> // template <class BidirectionalIterator, class Allocator, class charT, class traits> // bool // regex_match(BidirectionalIterator first, BidirectionalIterator last, // match_results<BidirectionalIterator, Allocator>& m, // const basic_regex<charT, traits>& e, // regex_constants::match_flag_type flags = regex_constants::match_default); // std::regex in ECMAScript mode should not ignore capture groups inside lookahead assertions. // For example, matching /(?=(a))(a)/ to "a" should yield two captures: \1 = "a", \2 = "a" #include <regex> #include <cassert> #include "test_iterators.h" int main() { { std::regex re("^(?=(.))a$"); assert(re.mark_count() == 1); std::string s("a"); std::smatch m; assert(std::regex_match(s, m, re)); assert(m.size() == 2); assert(m[0] == "a"); assert(m[1] == "a"); } { std::regex re("^(a)(?=(.))(b)$"); assert(re.mark_count() == 3); std::string s("ab"); std::smatch m; assert(std::regex_match(s, m, re)); assert(m.size() == 4); assert(m[0] == "ab"); assert(m[1] == "a"); assert(m[2] == "b"); assert(m[3] == "b"); } { std::regex re("^(.)(?=(.)(?=.(.)))(...)$"); assert(re.mark_count() == 4); std::string s("abcd"); std::smatch m; assert(std::regex_match(s, m, re)); assert(m.size() == 5); assert(m[0] == "abcd"); assert(m[1] == "a"); assert(m[2] == "b"); assert(m[3] == "d"); assert(m[4] == "bcd"); } { std::regex re("^(a)(?!([^b]))(.c)$"); assert(re.mark_count() == 3); std::string s("abc"); std::smatch m; assert(std::regex_match(s, m, re)); assert(m.size() == 4); assert(m[0] == "abc"); assert(m[1] == "a"); assert(m[2] == ""); assert(m[3] == "bc"); } { std::regex re("^(?!((b)))(?=(.))(?!(abc)).b$"); assert(re.mark_count() == 4); std::string s("ab"); std::smatch m; assert(std::regex_match(s, m, re)); assert(m.size() == 5); assert(m[0] == "ab"); assert(m[1] == ""); assert(m[2] == ""); assert(m[3] == "a"); assert(m[4] == ""); } }