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I wanted to do some regular expressions in C++ so I looked on the interwebz (yes, I am an beginner/intermediate with C++) and found this SO answer.
I really don't know what to choose between boost::regex and boost::xpressive. What are the pros/cons?
I also read that boost::xpressive opposed to boost::regex is a header-only library. Is it hard to statically compile boost::regex on Linux and Windows (I almost always write cross-platform applications)?
I'm also interested in comparisons of compile time. I have a current implementation using boost::xpressive and I'm not too content with the compile times (but I have no comparisons to boost::regex).
Of course I'm open for other suggestions for regex implementations too. The requirements are free (as in beer) and compatible with http://nclabs.org/license.php.
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Boost. Regex allows you to use regular expressions in C++. As the library is part of the standard library since C++11, you don't depend on Boost. Regex if your development environment supports C++11. You can use identically named classes and functions in the namespace std if you include the header file regex .
The current std::regex design and implementation are slow, mostly because the RE pattern is parsed and compiled at runtime. Users often don't need a runtime RE parser engine as the pattern is known during compilation in many common use cases.
One fairly important difference is that Boost Regex can support linking to ICU for Unicode support (character classes, etc) Boost Regex ICU Support.
As far as I can tell, Boost Xpressive doesn't have this kind of support built-in.
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