test/std/re/re.regex/re.regex.assign/assign.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     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 charT, class traits = regex_traits<charT>> class basic_regex;

// basic_regex& assign(const basic_regex& that);

#include <regex>
#include <cassert>

int main()
{
    std::regex r1("(a([bc]))");
    std::regex r2;
    r2.assign(r1);
    assert(r2.flags() == std::regex::ECMAScript);
    assert(r2.mark_count() == 2);
    assert(std::regex_search("ab", r2));
    
    bool caught = false;
    try { r2.assign("(def", std::regex::extended); }
    catch(std::regex_error &) { caught = true; }
    assert(caught);
    assert(r2.flags() == std::regex::ECMAScript);
    assert(r2.mark_count() == 2);
    assert(std::regex_search("ab", r2));
}