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-exception
6//
7//===----------------------------------------------------------------------===//
8
9// <regex>
10// UNSUPPORTED: c++03, c++11, c++14
11
12// template<class ForwardIterator>
13// basic_regex(ForwardIterator, ForwardIterator,
14// regex_constants::syntax_option_type = regex_constants::ECMAScript)
15// -> basic_regex<typename iterator_traits<ForwardIterator>::value_type>;
16
17#include <regex>
18#include <string>
19#include <iterator>
20#include <cassert>
21#include <cstddef>
22
23
24int main(int, char**)
25{
26 // Test the explicit deduction guides
27 {
28 // basic_regex(ForwardIterator, ForwardIterator)
29 // <int> is not an iterator
30 std::basic_regex re(23, 34); // expected-error-re {{no viable constructor or deduction guide for deduction of template arguments of '{{(std::)?}}basic_regex'}}
31 }
32
33 {
34 // basic_regex(ForwardIterator, ForwardIterator, flag_type)
35 // <double> is not an iterator
36 std::basic_regex re(23.0, 34.0, std::regex_constants::basic); // expected-error-re {{no viable constructor or deduction guide for deduction of template arguments of '{{(std::)?}}basic_regex'}}
37 }
38
39 return 0;
40}
41

source code of libcxx/test/std/re/re.regex/re.regex.construct/deduct.verify.cpp