Pixel2Life Forum > Regex is driving me mad!

Pixel2Life Forum > Help Section > Desktop Programming

Glasseater

May 6 2007, 09:38 AM

Hey guys, I'm just looking for some help with a regular expression problem. I'm trying to make a database program that will read in the title (eg. [weapon=12]) of the section like this;

CODE

[weapon=1]
damage=12;
resistance=13;
etc...

Right now, I'm just testing to see if I can read just the title by itself.
Here's my code that doesn't work;

CODE

	string input = "[weapon=12]";
	regex finder("^\[([a-zA-Z]+)=([0-9]+)\]$");
	cmatch matches;
	if(regex_match(input.c_str(), matches, finder))
	{
		cout << input << " matches " << finder << "." << endl;
		for(int c = 0; c < matches.size(); c++)
		{
			cout << "\t#" << c << " - " << matches[c] << endl;
		}
	}
	else
	{
		cout << "No matches were found." << endl;
	}

This program gives me the following error:

This application has requested the Runtime to terminate in an unusual way. Please contact the application's support team for more information.

If I change the "finder" value to ^\[([a-zA-Z]+=([0-9]+)\]$ (I removed 1 bracket just before the =) it works, but returns this;

CODE

[weapon=12] matches ^\[([a-zA-Z]+=([0-9]+)\]$
	#0 - [weapon=12]
	#1 - 12

I was hoping it would return 'weapon' as value 1 and '12' as value 2.

I'm using Dev C++ 4.9.9.2 with Boost.Regex
Any help/advice would be much appreciated.

P.S. I also tested the first one in several regex testers, and all of them returned the proper values, so I really have no clue what wrong with this. In the documentation for Boost.Regex, they said that it uses Perl's same grammar and that's what I used to build this one.

MetalSkin

Jun 25 2007, 05:04 PM

Well your right about the regex syntax being correct, however I'm not 100% familiar with any perl peculiarities.

Found an interesting tutorial on the library that your using (boost.regex) which may or may not assist:

boost.regex tutorial

I presume your having a gander at the doco here.

Maybe someone who is more familiar with perl regex can assist.

This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.