C++11 regex doesn't match the test string

Asked Feb 23 '21 at 08:21

Active Feb 23 '21 at 08:21

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I want to match this string like this:Micron_5200_MTFDDAK3T8TDC

I use a regular expression:(Micron_5200_)?MTFDDAK(480|960|1T9|3T8|7T6)TD(C|D|N)

Then I try it with C++:

string str="Micron_5200_MTFDDAK3T8TDC";
string pattern="(Micron_5200_)?MTFDDAK(480|960|1T9|3T8|7T6)TD(C|D|N)";
regex reg(pattern,regex_constants::extended);
cout << regex_match(str, reg) << endl;

I compile it on centos7.6 x64 using GCC 4.8.5 with -std=c++11 flag. But I always get No matches found. What am I doing wrong?

asked Feb 23 '21 at 08:21

jiaming wei

[Works for me](https://ideone.com/pzFRnk) – john Feb 23 '21 at 08:26
Unfortunately, rather than just omitting a regex implementation gcc 4.8 had one that didn't work – Alan Birtles Feb 23 '21 at 08:27
You should update your compiler to GCC 4.9 to fix that, or use Boost Regex. https://stackoverflow.com/a/12665408/8298564 – therealcain Feb 23 '21 at 08:29

C++11 regex doesn't match the test string

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