std::regex_replace does not take fewer than 6 arguments

Question

I'm trying to learn how to use the regex library in c++11. On ubuntu 13.10 I'm trying to compile the following example from cplusplus.com:

// regex_replace example
#include <iostream>
#include <string>
#include <regex>
#include <iterator>

int main ()
{
  std::string s ("there is a subsequence in the string\n");
  std::regex e ("\\b(sub)([^ ]*)");   // matches words beginning by "sub"

  // using string/c-string (3) version:
  std::cout << std::regex_replace (s,e,"sub-$2");

  // using range/c-string (6) version:
  std::string result;
  std::regex_replace (std::back_inserter(result), s.begin(), s.end(), e, "$2");
  std::cout << result;

  // with flags:
  std::cout << std::regex_replace (s,e,"$1 and $2",std::regex_constants::format_no_copy);
  std::cout << std::endl;

  return 0;
}

With the command:

$ g++ -std=c++11 -o file file.cc

I get the following output:

file.cc:13:48: error: no matching function for call to ‘regex_replace(std::string&, std::regex&, const char [7])’

What am I doing wrong?! There's not much hair left on my head... Thanks in advance

Works with clang++/libc++ http://coliru.stacked-crooked.com/a/e52aacb4bb121c9c — Cubbi, Feb 18 '14 at 16:44
What does `g++ --version` print? GCC did not support C++11 regular expressions until [version 4.9](http://stackoverflow.com/questions/12530406/is-gcc4-7-buggy-about-regular-expressions/12665408#12665408) — Cubbi, Feb 18 '14 at 16:57
version 4.8.1 ... That explains a lot. Version 4.9 seems to be under development, or can I update gcc to that version? — Niklas, Feb 18 '14 at 17:27
@Niklas: Yes, it's under development, but it's really close to release so you could update to a trunk build in the meantime. — Lightness Races in Orbit, Feb 18 '14 at 17:42

score 4 · Accepted Answer · edited May 23 '17 at 12:05

4

You need to update your compiler from GCC 4.8 to GCC 4.9.

Unfortunately, GCC 4.9 has not been released yet, but it's stable enough to go with a trunk build if you need this functionality imminently.

Alternatively, give Clang or Boost.Regex a go.

edited May 23 '17 at 12:05

Community

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answered Feb 18 '14 at 17:42

Lightness Races in Orbit

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boost.regex could be a viable alternative, too – Cubbi Feb 18 '14 at 18:26
@Cubbi: This is true. – Lightness Races in Orbit Feb 18 '14 at 18:27

std::regex_replace does not take fewer than 6 arguments

1 Answers1