Questions tagged [dynamic-scoping]
The dynamic-scoping tag has no usage guidance.
27
questions
10
votes
3
answers
381
views
Why does defvar scoping work differently without an initvalue?
Suppose I have a file named elisp-defvar-test.el containing:
;;; elisp-defvar-test.el --- -*- lexical-binding: t -*-
(defvar my-dynamic-var)
(defun f1 (x)
"Should return X."
(let ((my-dynamic-...
- 435
6
votes
1
answer
1k
views
Scope in lambda
In my .emacs conf file, I've got this function that adds a hook to set the compile-command based on the mode. It looks something like,
(defun set-compile-cmd (mode-hook cmd)
(add-hook mode-hook (...
- 63
6
votes
1
answer
1k
views
Why does calling expand-file-name indirectly produce a different result?
Running the following in ielm in emacs -Q:
ELISP> (defun wh/expand-file-name (name &optional default-directory)
(expand-file-name name default-directory))
wh/expand-file-name
ELISP> (...
- 6,920
5
votes
1
answer
499
views
About closure creation
After reading this article about readable closures, I check that:
Since closures are byte-code function objects, they print readably.
You can capture an environment in a closure, serialize it, ...
- 749
4
votes
1
answer
69
views
why is a let binding is ignored in compiled function?
I have this function which works perfectly in an uncompiled function. It should let-bind the variable bibtex-completion-bibliography to the result of (org-ref-find-bibliography).
(defun org-ref-...
- 11.9k
3
votes
3
answers
343
views
How does scoping work in emacs lisp
A lot of emacs configurations shared publicly have this format:
;; 01-something.el
(provide 'something)
;; init.el
(require 'something)
Suppose I'm writing a defun named "s-join" inside 01-...
- 3,913
3
votes
1
answer
356
views
How do I temporarily mock a function for testing?
I'd like to patch some elisp functions inside my unit tests. I've tried cl-labels and cl-flet, but neither achieve the result I want:
(defun return-number ()
1)
(defun calls-return-number ()
(...
- 6,920
3
votes
2
answers
579
views
Accessing the global value of a locally altered variable
Is it possible to access the global value of a variable that has been
changed locally?
(setq foo 2)
(let ((foo 3))
;; can I access the original value here?
)
- 3,264
3
votes
1
answer
189
views
How does one "extend" an existing function?
What I want to do: have the function evil-delete do one more task after its usual code. (I'm presuming that evil-delete is the underlying workhorse that is called by evil-delete-line and about five ...
- 133
2
votes
1
answer
70
views
`make-local-variable` Behaves Differently depending on Whether Variable is Special
Two examples (both are in the *scratch* buffer and under lexical scoping rule):
_
(setq xx :default)
(let ((xx :let))
(with-current-buffer (get-buffer-create "tmp")
(make-local-...
- 5,308
2
votes
1
answer
238
views
Why is org-table-calc-current-TBLFM throwing Wrong type argument: integer-or-marker-p Error?
Why does my code generate the error when used with org-table?
No error message when code used outside of org-table
#+NAME: get-country-or-area-name
#+HEADER: :var iso-alpha2-code="ca"
#+HEADER: :...
- 4,644
2
votes
3
answers
180
views
Changing a mode's keymap for the duration of a command's execution
I would like to bind TAB to my company-mode back-end only for the duration of a command's execution. I am trying to achieve this by using dynamic scoping as follows (the irrelevant part of the ...
- 779
2
votes
0
answers
104
views
Can I set a variable scoped to a perspective?
I have a large monorepo repository and open different parts of it in a persp-mode perspective. It would be nice if for all buffers owned by that perspective I could set for example projectile-project-...
- 407
1
vote
1
answer
277
views
How to temporarily change the definition of a function?
In the following code the function foo calls the outer f2 function. How to make it call the anonymous function bound within the let?
(defun f2 ()
(message "outer f2"))
(defun foo ()
(f2)...
- 445
1
vote
1
answer
53
views
Inconsistency in emacs' rules of scope?
I have always felt that emacs' rules of scope are a bit strange
and prone to contradictions. In fact I have even attempted to file
bug reports just to be told that my interpretation of the rules of ...
- 839
1
vote
1
answer
81
views
How to avoid variable name collisions in my init file?
I noticed spacemacs puts things like autosave and backup files in ~/.emacs.d/.cache/ and I'd like to use that idea in my own setup.
From spacemacs/core/core-load-paths.el
(defconst spacemacs-cache-...
- 1,948
1
vote
1
answer
95
views
Warning: assignment to free variable ‘skeleton-pair’
Am using the following function, but getting the error
In bracemk-balance:
fencones.el:109:9:Warning: assignment to free variable
‘skeleton-pair’
What is wrong with this?
(defun bracemk-balance ()...
- 1
1
vote
1
answer
71
views
Top-level variables, local variables, variable scoping and the difference between set and setq
I've been reading about emacs dynamic and lexical bindings. While I generally get the difference between the two types, there is one example that is not clear to me.
I've checked this question and I ...
- 111
1
vote
1
answer
327
views
How to fix Warning: assignment to free (local) variable in lambda function
The byte compiler just gave me this message
1103:24:Warning: assignment to free variable `orig-win-config
on this bit of code:
;; create window config store and restore functions
;; credit to @...
- 1,318
1
vote
1
answer
33
views
dynamic scoping rules work differently after redefining an autoloaded function without changing its code
Evaluate the following code:
(package-initialize)
(unless package-archive-contents (package-refresh-contents))
(package-install-selected-packages)
(org-babel-do-load-languages
'org-babel-load-...
- 215
1
vote
0
answers
276
views
How to override a value inside a function temporarily?
There is this function in tide:
;; Defined in ~/.emacs.d/.local/straight/repos/tide/tide.el
(defun tide-rename-file ()
"Rename current file and all it's references in other files."
(...
- 141
0
votes
3
answers
202
views
How did `cl-flet` got circumvented?
I want to slightly alter the behavior of counsel-fzf by locally changing the definition of counsel-fzf-action, which activates in the end of the definition of the former. See the source code of ...
- 225
0
votes
1
answer
116
views
Search in readable eww buffer [duplicate]
I would like to open url in eww in readable-mode and find str.
Below is my code that doesn't work:
(defun my-eww-searh-readable (str)
"Once-off call to `my-eww-searh-readable' after EWW is done ...
- 338
0
votes
1
answer
174
views
Forcing lexical-scope in the middle of dynamic-scope
Today I ran head first into lexical vs dynamic scope in Emacs Lisp. Gist of it is I have a macro defined in lexical scope that expands into a `defun'. Let's say something simple like this:
;; -*- ...
- 335
0
votes
1
answer
49
views
capture and replay a closure later
I am having a problem working with closures. I hope I can explain this clearly. When I try to start a compilation I typically do it like this:
(let ((dir (get-dir))
(model-root root)
(default-...
- 859
0
votes
0
answers
43
views
dynamic scoping doesn't perform as expected
(require 'cl)
(require 'seq)
(require 'dash)
(eval-when-compile
(require 'cl-lib)
(require 'subr-x)
(require 'env)
(require 'json))
(defgroup chatgpt nil
"ChatGPT frontend."
:...
0
votes
2
answers
201
views
Unusual behavior when overriding `calculate-lisp-indent'
I've modified calculate-lisp-indent as a better solution to the indentation questions here, here and here. By "modified" I mean I overrode the function with advice. After doing this when I restarted ...
- 1,453