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Diffstat (limited to 'lib.macros.lisp')
-rw-r--r-- | lib.macros.lisp | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/lib.macros.lisp b/lib.macros.lisp deleted file mode 100644 index d182ce0..0000000 --- a/lib.macros.lisp +++ /dev/null @@ -1,91 +0,0 @@ -;;; lib.macros.lisp - 2025-02-09 - -;; Copyright (C) 2025 Aryadev Chavali - -;; This program is distributed in the hope that it will be useful, but WITHOUT -;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS -;; FOR A PARTICULAR PURPOSE. See the GNU General Public License Version 2 for -;; details. - -;; You may distribute and modify this code under the terms of the GNU General -;; Public License Version 2, which you should have received a copy of along with -;; this program. If not, please go to <https://www.gnu.org/licenses/>. - -;;; Commentary: - -;; Helpful macros for usage throughout the project. - -;;; Code: - -(in-package :cantedraw.lib.macros) - -(defmacro --> (placeholder &body forms) - "Lexically bind current form as `placeholder' for use in the next form, returning -the result of the last form. - -i.e. - -(--> (a1 a2...) (b1 b2...) (c1 c2...)) = -(let* ((placeholder (a1 a2 ...)) - (placeholder (b1 b2 ...)) - (placeholder (c1 c2 ...))) - _ ) - -Also includes transformer where symbols are considered unary functions i.e. -(--> x y) <-> (--> x (y placeholder)). -" - (if (null forms) - nil - (let ((assignment-forms - (loop :for f :in forms - :for canon-f := (if (symbolp f) - (list f placeholder) - f) - :collect `(,placeholder ,canon-f)))) - `(let* ,assignment-forms - ,placeholder)))) - -(defmacro ->> (&rest forms) - "Make current form the last argument of the next form, returning the last - form. - -i.e. -(->> (a1 a2...) (b1 b2...) (c1 c2...)) == (c1 c2 ... (b1 b2 ... (a1 a2 ...))) - -Also includes transformer where symbols are considered unary functions. - -Like the `|>' operator in Ocaml." - (if (null forms) - nil - (loop :with acc = (car forms) - :for func :in (cdr forms) - :for canon-func = (if (symbolp func) (list func) func) - :do (setq acc (append canon-func (list acc))) - :finally (return acc)))) - -(defmacro while (condition &body body) - `(loop :while ,condition - :do - (progn ,@body))) - -(deftype -> (args result) - "Type alias for function." - `(function ,args ,result)) - -(defmacro fn (name lambda-list type &body body) - "Construct a function `NAME' with a declared function type `TYPE' that takes -arguments `LAMBDA-LIST' with body `BODY'." - `(progn - (declaim (ftype ,type ,name)) - (defun ,name ,lambda-list - ,@body))) - -(defmacro $ (&rest forms) - "Given a sequence of FORMS, return a unary function which applies each form -sequentially" - `(lambda (x) - (->> x ,@forms))) - -(defmacro alist-val (key alist) - "Helper macro for getting the value of KEY in ALIST." - `(cdr (assoc ,key ,alist))) |