39 lines · 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-exception6//7//===----------------------------------------------------------------------===//8 9// <regex>10 11// class match_results<BidirectionalIterator, Allocator>12 13// difference_type length(size_type sub = 0) const;14 15#include <regex>16#include <cassert>17#include "test_macros.h"18 19void20test()21{22 std::match_results<const char*> m;23 const char s[] = "abcdefghijk";24 assert(std::regex_search(s, m, std::regex("cd((e)fg)hi")));25 assert(m.length() == m[0].length());26 assert(m.length(0) == m[0].length());27 assert(m.length(1) == m[1].length());28 assert(m.length(2) == m[2].length());29 assert(m.length(3) == m[3].length());30 assert(m.length(4) == m[4].length());31}32 33int main(int, char**)34{35 test();36 37 return 0;38}39