Conflicting regex results

Question

I need to evaluate a regex on some data that I have. It is to get filenames from a string input in a specific order.

I have so far done this - http://regex101.com/r/rZ8tP0/1

PS: I am not well versed with regex, so kindly do not talk about this being non-optimal. Optimal solutions welcome.

The real issue is - I have a C++ program that does this. The program returns a 0 for the same string-regex combination, for which regex101 returns 1. What am I missing?

The C++ code is:

#include<iostream>
#include<regex>
using namespace std;
int main()
{
    string s = "data-FileName-author-data-";
    string r = "(.+-){1}FileName-(.+-){2}";
    cout<<regex_match(s, regex(r))<<"\n"; //returns 0
}

@MSalters: Similar problem has been asked more than once, from incorrect result to error. I admit the choice of the question is poor, but this question should be closed as dup nonetheless. — nhahtdh, Oct 20 '14 at 07:21
Also your online regex tester is configured to use PCRE style regex whereas C++11, by default, uses ECMAScript (iirc). So probably best to set your online tester to Javascript mode (JS). — Galik, Oct 20 '14 at 07:33
@nhahtdh: If you think it should be closed as duplicate, find one that addresses inconsistent results. — MSalters, Oct 20 '14 at 07:39
@MSalters: http://stackoverflow.com/questions/12530406/is-gcc4-7-buggy-about-regular-expressions This one looks somewhat OK as dup. — nhahtdh, Oct 20 '14 at 07:59

score 1 · Accepted Answer · answered Oct 20 '14 at 07:14

1

Which compiler you use? If gcc - only gcc 4.9+ supports correct work for regexes. Live example on Coliru, that shows 1

answered Oct 20 '14 at 07:14

ForEveR

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Thanks. I will check that up. – Kut KV Oct 20 '14 at 07:27

Conflicting regex results

1 Answers1