70 lines
2.9 KiB
EmacsLisp
70 lines
2.9 KiB
EmacsLisp
;;; syd-prelude.el -*- lexical-binding: t; -*-
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(eval-when-compile (require 'cl-lib))
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(require 'syd-constants)
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(cl-defmacro syd-define-stub
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(name &key (desc "implement me!") interactive)
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(let ((todo (format "%s: TODO: %s" name desc)))
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`(defun ,name (&rest _)
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,@(if interactive (list '(interactive)) nil)
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,todo
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(error ,todo))))
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(cl-defun syd--lift-lambdas (forms &key with-each with-all)
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;; Call the continuation if non-nil. Wraps the return value in a singleton
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;; list for "affine" use with unquote-splicing.
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(let ((call-cont (lambda (cont)
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(if cont
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(lambda (name) (list (funcall with-each name)))
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(lambda (_) nil))))
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names)
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`(progn ,@(mapconcat (lambda (form)
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(cond ((and (symbolp form) (functionp form))
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(push form names)
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(call-cont with-each form))
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((eq (car-safe form) 'defun)
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(let ((name (nth 1 form)))
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(push name names)
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`(,form
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,@(call-cont with-each))))
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((eq (car-safe form) 'lambda)
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(let ((name (gensym "lifted-lambda")))
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(push name names)
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`((defun ,name (&rest args)
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(,form args))
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,@(call-cont with-each))))))
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(ensure-list forms))
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,@(call-cont with-all names))))
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;; (defun syd-hform-defun (hform)
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;; "If HFORM is a defun form, return the defun's name. Otherwise, return nil"
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;; (and (listp hform)
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;; (<= 2 (length hform))
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;; (nth 1 hform)))
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(defmacro comment (&rest _)
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"Completely every argument, and expand to nil."
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nil)
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(defmacro with-transient-after (hook-or-function &rest forms)
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(let ((hook-name (gensym "transient-hook"))
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(hook-or-function* (gensym "hook-or-function")))
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`(let* ((,hook-or-function* ,hook-or-function))
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(defun ,hook-name (&rest _)
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"Transient hook defined by `with-transient-after'."
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(cond ((functionp ,hook-or-function*)
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(advice-remove ,hook-or-function* #',hook-name))
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((symbolp ,hook-or-function*)
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(remove-hook ,hook-or-function* #',hook-name)))
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,@forms)
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(cond ((functionp ,hook-or-function*)
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(advice-add ,hook-or-function* :before #',hook-name))
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((symbolp ,hook-or-function*)
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;; https://www.gnu.org/software/emacs/manual/html_node/elisp/Setting-Hooks.html#Setting-Hooks-1
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(put ',hook-name 'permanent-local-hook t)
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(add-hook ,hook-or-function* #',hook-name))))))
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(provide 'syd-prelude)
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