<s>
R++	B-Language
is	O
a	O
rule-based	B-Language
programming	I-Language
language	O
based	O
on	O
C++	B-Language
,	O
described	O
as	O
follows	O
:	O
</s>
<s>
The	O
R++	B-Language
extension	O
permits	O
rules	O
to	O
be	O
defined	O
as	O
members	O
of	O
C++	B-Language
classes	O
.	O
</s>
<s>
The	O
programming	O
system	O
of	O
the	O
invention	O
takes	O
the	O
classes	O
with	O
rules	O
defined	O
using	O
R++	B-Language
and	O
generates	O
C++	B-Language
code	I-Language
from	O
them	O
in	O
which	O
the	O
machinery	O
required	O
for	O
the	O
rules	O
is	O
implemented	O
completely	O
as	O
C++	B-Language
data	O
members	O
and	O
functions	O
of	O
the	O
classes	O
involved	O
in	O
the	O
rules	O
.	O
</s>
<s>
R++	B-Language
was	O
developed	O
by	O
Bell	O
Labs	O
in	O
the	O
1990s	O
,	O
but	O
due	O
to	O
the	O
Bell	O
System	O
divestiture	O
that	O
split	O
the	O
legal	O
rights	O
to	O
the	O
work	O
developed	O
at	O
the	O
Laboratories	O
between	O
AT&T	O
and	O
Lucent	O
,	O
did	O
not	O
see	O
immediate	O
commercial	O
development	O
while	O
the	O
two	O
companies	O
disputed	O
ownership	O
.	O
</s>
