swipl: how to reload file

Question

First I load the file with SWI-Prolog

$ swipl file.pl

then I modify the file and save.

Now how do I reload the file like

?- reload

for this modified file.pl?

Answer 1

SWI-Prolog has a predicate make/0 for this purpose:

?- make. 

Note that SWI-Prolog has a handy feature for searching the manual for keywords:

?- apropos(reload). 

Points you (among other things) to Section 3.3 of the manual: "The test-edit-reload cycle", which mentions this.

Answer 2

Make will reload all source files that have been changed since they were loaded, but if you need to reload an specific file you can use reload_file:

?- make:reload_file(source_file).