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Type testing
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<TR><TD><FONT SIZE=4><B><A NAME="htoc316">8.4</A></B></FONT></TD>
<TD WIDTH="100%" ALIGN=center><FONT SIZE=4><B>Type testing</B></FONT></TD>
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<LI><A HREF="manual058.html#toc260"> <TT>fd_var/1</TT>, <TT>non_fd_var/1</TT>,
<TT>generic_var/1</TT>,
<TT>non_generic_var/1</TT></A>
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<A NAME="toc260"></A><TABLE CELLPADDING=0 CELLSPACING=0 WIDTH="100%">
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<TR><TD><B><A NAME="htoc317">8.4.1</A></B></TD>
<TD WIDTH="100%" ALIGN=center><B><TT>fd_var/1</TT>, <TT>non_fd_var/1</TT>,
<TT>generic_var/1</TT>,
<TT>non_generic_var/1</TT></B></TD>
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<BR>
<B>Templates</B>
<DL COMPACT=compact><DT><DD><TT>
fd_var(?term)<BR>
non_fd_var(?term)<BR>
generic_var(?term)<BR>
non_generic_var(?term)</TT></DL>
<B>Description</B><BR>
<BR>
<TT>fd_var(Term)</TT> succeeds if <TT>Term</TT> is currently an
FD variable.<BR>
<BR>
<TT>non_fd_var(Term)</TT> succeeds if <TT>Term</TT> is
currently not an FD variable (opposite of <TT>fd_var/1</TT>).<BR>
<BR>
<TT>generic_var(Term)</TT> succeeds if <TT>Term</TT> is
either a Prolog variable or an FD variable.<BR>
<BR>
<TT>non_generic_var(Term)</TT> succeeds if
<TT>Term</TT> is neither a Prolog variable nor an FD variable
(opposite of <TT>generic_var/1</TT>).<BR>
<BR>
<B>Errors</B><BR>
<BR>
None.<BR>
<BR>
<B>Portability</B><BR>
<BR>
GNU Prolog predicate.<BR>
<BR>
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Copyright (C) 1999-2002 Daniel Diaz
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