C++11 std::regex_replace() creating regexp with certain string issue

Question

I am currently trying to write a class function that will replace every occurence of a word in a string with an other word , using C++11 lib.

void replace(std::string subject, std::string pattern, std::string replacement)
{
    std::regex exp(pattern);
    std::cout <<  std::regex_replace(subject, exp, replacement); 
}


replace(std::string("Hello world"),std::string("world"),std::string("planet"));

returns nothing.

I guess that the problem is regular expression , but i have no idea and cannot find anywhere how to make a regexp matching an certain string using ECMAScript or any other availible in .

Does anyone know how to solve this problem ?

What is the `subject`, `pattern`, and `replacement` you are passing it? Edit your question and include that information otherwise we're just relying on our fabulous clanking crystal balls. — Captain Obvlious, Jun 21 '13 at 22:36
It seems like i need to use boost instead. Thank You very much for Your help. — pawels1991, Jun 21 '13 at 22:57
In JavaScript, it's simply `string.replace(/regexp/g,"repstring");` — , Jun 24 '13 at 03:12

Pixelchemist · Accepted Answer · 2013-06-21T23:16:22.617

1

For completeness: As Xaqq and Captain Obvlious stated in the comments, regex is not yet supported by gcc.

See this gcc libstdc++ Status Page for reference.

On MSVC 2012 your functions works with the desired output.

replace("Hello world", "^(.*)world(.*)$", "$1planet$2");

Hello planet

edited Jun 21 '13 at 23:16

answered Jun 21 '13 at 22:54

Pixelchemist

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this producess different output output should be: `Hello planet` – hetepeperfan Jun 21 '13 at 22:55
On gcc version 4.7.2 this doesn't produce any output. Are we running in stdlib implementation issues? – Xaqq Jun 21 '13 at 22:56
same on GCC 4.8.1 (no output) and also clang++ 3.3 – bennofs Jun 21 '13 at 22:57
@Xaqq not sure but since the OP doesn't seem interested I'm going to follow up on it and if it is I'll submit a bug report – Captain Obvlious Jun 21 '13 at 23:00
1

@CaptainObvlious In fact it seems that regex are not implemented in GCC yet. See this http://stackoverflow.com/questions/15059162/c11-regex-matching. – Xaqq Jun 21 '13 at 23:02
@Xaqq You read my mind. Just checked and was about to post the same thing lol. Problem solved. – Captain Obvlious Jun 21 '13 at 23:04
@CaptainObvlious I was afk :P – Xaqq Jun 21 '13 at 23:51

C++11 std::regex_replace() creating regexp with certain string issue

1 Answers1