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You can ask for code to be executed if and when a particular library is
loaded, by calling
The library name library must exactly match the argument of
load. To get the proper results when an installed library is
found by searching
load-path, you should not include any
directory names in library.
An error in form does not undo the load, but does prevent execution of the rest of form.
In general, well-designed Lisp programs should not use this feature.
The clean and modular ways to interact with a Lisp library are (1)
examine and set the library's variables (those which are meant for
outside use), and (2) call the library's functions. If you wish to
do (1), you can do it immediately--there is no need to wait for when
the library is loaded. To do (2), you must load the library (preferably
But it is OK to use
eval-after-load in your personal
customizations if you don't feel they must meet the design standards for
programs meant for wider use.
after-load-alist in order to
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