27 lines
847 B
Common Lisp
27 lines
847 B
Common Lisp
(in-package #:cl-forth)
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;; For debugging purposes.
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(defparameter *interpreter*
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(make-instance 'interpreter))
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(defun main ()
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(let ((interp *interpreter*)
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(input ""))
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(format t "Welcome to CL-Forth! Type your commands below (type 'exit' to quit).~%")
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(loop
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(format t "CL-FORTH) ")
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(finish-output)
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(setf input (read-line))
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(if (string= input "exit")
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(progn
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(format t "Exiting CL-Forth. Goodbye!~%")
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(return))
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(progn
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(handler-case
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(interpret interp input)
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(unknown-word-error (e)
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(format t "Error: Unknown word '~a'~%" (token-of e)))
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(stack-underflow (e)
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(declare (ignore e))
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(format t "Error: Stack underflow - cannot pop from an empty stack.~%"))))))))
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