/usr/lib/swi-prolog/doc/Manual/mtoplevel.html

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<H2><A NAME="sec:5.6"><SPAN class="sec-nr">5.6</SPAN> <SPAN class="sec-title">Interacting 
with modules from the toplevel</SPAN></A></H2>

<A NAME="sec:mtoplevel"></A>

<P>Debugging often requires interaction with predicates that reside in 
modules: running them, setting spy-points on them, etc. This can be 
achieved using the &lt;<VAR>module</VAR>&gt;:&lt;<VAR>term</VAR>&gt; 
construct explicitly as described above. In SWI-Prolog, you may also 
wish to omit the module qualification. Setting a spy-point (<A NAME="idx:spy1:1250"></A><A class="pred" href="debugger.html#spy/1">spy/1</A>) 
on a plain predicate sets a spy-point on any predicate with that name in 
any module. Editing (<A NAME="idx:edit1:1251"></A><A class="pred" href="listing.html#edit/1">edit/1</A>) 
or calling an unqualified predicate invokes the DWIM (Do What I Mean) 
mechanism, which generally suggests the correct qualified query.

<P>Mainly for compatibility, we provide <A NAME="idx:module1:1252"></A><A class="pred" href="mtoplevel.html#module/1">module/1</A> 
to switch the module with which the interactive toplevel interacts:

<DL class="latex">
<DT class="pubdef"><A NAME="module/1"><STRONG>module</STRONG>(<VAR>+Module</VAR>)</A></DT>
<DD class="defbody">
The call <CODE>module(<VAR>Module</VAR>)</CODE> may be used to switch 
the default working module for the interactive top-level (see <A NAME="idx:prolog0:1253"></A><A class="pred" href="toplevel.html#prolog/0">prolog/0</A>). 
This may be used when debugging a module. The example below lists the 
clauses of file_of_label/2 in the module <CODE>tex</CODE>.

<PRE class="code">
1 ?- module(tex).

Yes
tex: 2 ?- listing(file_of_label/2).
...
</PRE>

<P></DD>
</DL>

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swi-prolog-nox 5.10.4-3ubuntu1 / usr / lib / swi-prolog / doc / Manual / mtoplevel.html
