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I was trying to parse a large file with blocked data using
regex library in VS2013. By working in 2 sites, I installed gcc on my Linux machine and VS2013 on Windows. The expression is very simple as "
START_INFO[here is the tricky bit]END_INFO", where each block is clearly enclosed by its own start and end information. Inside the
[] (square brackets) I'd like to match ALL valid characters. The
. (dot) matches almost all but not the newline character and it becomes literal inside the square brackets
[]. So I came up with an alternative solution "
[\s\S]+?" which should guide the program to search all whitespace and non-whitespace characters until it reaches the
END_INFO.
The code worked very well in gcc and game me the desired answer. Interestingly, in VS2013 it never found any match. (well, by saying match I mean using
sregex_iterator to search through all matched results.) The workaround is to replace
[\s\S]+? with
(\s|\S)+?. Why does the regular expression work differently in VS2013? Is this a bug? Maybe.
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