[Bug libgcj/20504] New: java.util.regex implementation doesn't support quoting constructs

["overholt at redhat dot com" <gcc-bugzilla@gcc.gnu.org>]

This was originally filed in GNU Classpath's BTS, but it should probably be here
as well.

Ziga Mahkovec wrote there
(https://savannah.gnu.org/bugs/index.php?func=detailitem&item_id=12307):

We were recently having some problems with the search functionality in native
eclipse[1]. It boiled down to the lack of quoting regex constructs support in
gnu.regexp.RE (\Q, \E). A simple test:

Pattern.compile("\\Q" + "boo" + "\\E").matcher("Peekaboo").find();

returns false using classpath and true using java-sun.

I'm attaching a more comprehensive Mauve test for the java.util.regex
functionality. It consists of three test suites, adapted from PCRE[2] (which is
BSD licensed):

- testdata1: tests that are currently passed by classpath
- testdata2: tests that currently fail (disabled since they probably
need to be reviewed)
- testdata3: tests that use quoting constructs

I'm also attaching a tentative patch for the quoting constructs problem.

[1] https://bugzilla.redhat.com/beta/show_bug.cgi?id=149927
[2] http://www.pcre.org/

-- 
           Summary: java.util.regex implementation doesn't support quoting
                    constructs
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libgcj
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: overholt at redhat dot com
                CC: gcc-bugs at gcc dot gnu dot org,java-prs at gcc dot gnu
                    dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20504