refactor regexp (bug #34440) * liboctave/regexp.h, liboctave/regexp.cc: New files. Provide classes and functions for regular expressions. Adapted from src/DLD-FUNCTIONS/regexp.cc. * regex-match.h, regex-match.cc: Delete * liboctave/Makefile.am (INCS, LIBOCTAVE_CXX_SOURCES): Update. * variables.cc (name_matches_any_pattern): Use new regexp class. * symtab.h (symbol_table::regexp_global_variables, symbol_table::do_clear_variable_regexp, symbol_table::do_regexp): Likewise. * DLD-FUNCTIONS/regexp.cc (parse_options): New function. (octregexp, octcellregexp, octregexprep): Extract matching code for use in new regexp class. Use new regexp class to provide required functionality.

--- a/liboctave/Makefile.am
+++ b/liboctave/Makefile.am
@@ -244,7 +244,7 @@
   randgamma.h \
   randmtzig.h \
   randpoisson.h \
-  regex-match.h \
+  regexp.h \
   singleton-cleanup.h \
   sparse-sort.h \
   sparse-util.h \
@@ -453,7 +453,7 @@
   oct-time.cc \
   oct-uname.cc \
   pathsearch.cc \
-  regex-match.cc \
+  regexp.cc \
   singleton-cleanup.cc \
   sparse-sort.cc \
   sparse-util.cc \