Re: [boost] [regex] unknown escape sequence inlibs/regex/test/regress/test_perl_ex.cpp

Boris Gubenko wrote:

regex library tests regex_regress[_threaded] fail to compile on gcc-4.2.1_hpux_ia64 because for a character string

"(?<=*|\B)"

gcc 4.2.1 emits a hard error "unknown escape sequence". gcc 3.4 series issues a warning, as well as EDG-based compilers. See reproducer below.

The character string in question should, probably, be: "(?<=*|\\B)".

Ok to change?

Yes please! Thanks, John.