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I get exception from regex = regex | sregex{ bos >> as_xpr("bar") >> *_ };. It seems that inside of assignment it enters boost::xpressive::detail::regex_matcher::static_compile_impl2(...), does impl->tracking_clear(); and partially clears contents of the temporary object on the right hand side of assignment operator.
It seems to me that my case is pretty similar to the case described in the Embedding a Regex by Value example. I am able to reproduce this behavior for boost 1.65.1 and 1.66.0 on both MSVC 2015 sp1 with /std:c++=latest and gcc 7.2.0.
How should I create such composite regular expression assuming I don't have all the pieces at once?
The text was updated successfully, but these errors were encountered:
I found a workaround. The issue seems to be with directly self-referencing a regex. If you copy a regex to a temporary variable first, you can then use that temp variable when updating the original regex. Example:
sregex rx1 = sregex::compile(".example");
sregex t = rx1;
rx1 = bos >> t >> eos;
I would guess there's some optimization in newer versions of gcc that's messing with the self-reference ability of the syntax.
Hi.
I'm trying to create composite regular expression by appending pieces one at a time.
Example:
I get exception from
regex = regex | sregex{ bos >> as_xpr("bar") >> *_ };
. It seems that inside of assignment it entersboost::xpressive::detail::regex_matcher::static_compile_impl2(...)
, doesimpl->tracking_clear();
and partially clears contents of the temporary object on the right hand side of assignment operator.It seems to me that my case is pretty similar to the case described in the Embedding a Regex by Value example. I am able to reproduce this behavior for boost 1.65.1 and 1.66.0 on both MSVC 2015 sp1 with /std:c++=latest and gcc 7.2.0.
How should I create such composite regular expression assuming I don't have all the pieces at once?
The text was updated successfully, but these errors were encountered: