Aryadev Chavali
f8a834c0d2
Instead of exporting cantedraw.lib.macro._ and making anyone who wants to use the --> macro _require_ importing that specific symbol, let's just make it so the user has to supply a placeholder name before they do anything. This means each package provides its own placeholder symbol which lowers coupling.
51 lines
1.4 KiB
Common Lisp
51 lines
1.4 KiB
Common Lisp
;;; main.lisp - 2025-02-11
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;; Copyright (C) 2025 Aryadev Chavali
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;; This program is distributed in the hope that it will be useful, but WITHOUT
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;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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;; FOR A PARTICULAR PURPOSE. See the GNU General Public License Version 2 for
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;; details.
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;; You may distribute and modify this code under the terms of the GNU General
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;; Public License Version 2, which you should have received a copy of along with
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;; this program. If not, please go to <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Defines the entrypoint of the program, handling any input from the user and
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;; passing it into the system.
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;;; Code:
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(in-package :cantedraw.main)
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(fn read-input (&optional (prompt "> ")) (-> (&optional string) string)
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(format t "~a" prompt)
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(force-output)
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(read-line))
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(fn parse-integers (input) (-> (string) list)
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(->> input
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uiop:split-string
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(mapcar #'parse-integer*)
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(remove-if #'null)))
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(fn read-integers () (-> nil list)
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(->> (read-input "Enter numbers: ")
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parse-integers))
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(fn read-until-integers () (-> nil list)
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(let ((inp (read-integers)))
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(while (null inp)
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(format t "Need at least one integer...~%")
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(force-output)
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(setq inp (read-integers)))
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inp))
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(defun start ()
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(--> var
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(read-until-integers)
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(cons '+ var)
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(format t "~a = ~a~%" var (eval var))))
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