@c "prs/attribute-unstab.texi"
@c extracted from "../../src/Object/lang/PRS_attribute_registry.cc"
@c by "$(top_srcdir)/scripts/extract_texinfo.awk".

@defmac unstab b
If @var{b} is true (1), rule is allowed to be unstable, as an exception.
If unspecified, default value is true.  
@end defmac

