CODEWITHSUNDEEP
functionemacscommon-lisp
trungnt
trungnt

Reputation: 1111

How do I use a function from one lisp file to solve for something in another lisp file?

I'm new to lisp and my professor gave some .lisp files to play around with.

http://pastebin.com/eDPUmTa1 (search functions)

http://pastebin.com/xuxgeeaM (water jug problem saved as waterjug.lisp)

The problem is I don't know how to implement running functions from one file to solve problems from another. The most I've done is compiled functions from one file and played around with it in the terminal. I'm not sure how to load 2 files in this IDE as well as how I should run the function. I'm trying, for example, to run the breadth-first-search function to solve the problem to no avail.

I'm currently using emacs as the text editor SBCL as the common lisp implementation along with quicklisp and slime.

Upvotes: 1

Views: 338

Answers (1)

coredump
coredump

Reputation: 38967

Assuming each file is in its own buffer, say f1.lisp and f2.lisp, then you only have to call slime-compile-and-load-file when you are in each buffer. This is bound by default to C-c C-k. You have to compile the first file first, because it contains definitions for the second one.

But, your second file (f2.lisp) has two problems: search for (break and (bread and remove those strings. Check if the forms around them have their parenthesis well balanced.

Take care of warning messages and errors while compiling your file. Then, if you want to evaluate something directly from the buffer, put your cursor (the point) after the form you want to evaluate, and type C-x C-e (imagine the cursor is represented by % below):

(dump-5 (start-state *water-jug*))%

This will print the result in the minibuffer, in your case something like #<JUG-STATE {1004B61A63}>, which represents an instance of the JUG-STATE class. Keep a window open to the REPL buffer in case the functions write something to standard output (this is the case with the (describe ...) expression below).

If instead you do C-c I, this will ask you which expression you want to inspect, already filled with the form before the point. When you press enter, the inspector buffer will show up:

#<JUG-STATE {1004BD8F53}>
--------------------
Class: #<STANDARD-CLASS COMMON-LISP-USER::JUG-STATE>
--------------------
 Group slots by inheritance [ ]
 Sort slots alphabetically  [X]

All Slots:
[ ]  FIVE = 0
[ ]  TWO  = 2

[set value]  [make unbound]

Read http://www.cliki.net/slime-howto.

Upvotes: 2

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