Questions tagged [lexical-binding]

I have been trying to understand what difference it makes if you set the file variable lexical-binding to t for a particular source file. As mentioned in emacswiki that in order to use lexical-bindings in your source files, you specifically have to…

The custom function below my-jump-to works after being evaluated in a scratch buffer, but does not work when I stick it into a library with lexical-binding non-nil in the header. When byte-compiling, I get a warning: reference to free variable…

I want to try new features in emacs 26, I'm using emacs 27, generators and threads, but when I try to use on ielm buffer, I get the same error: ELISP> (iter-defun my-iter (x) (iter-yield (1+ (iter-yield (1+ x)))) ;; Return normally -1) ***…

Here's a simple example from the manual: ;; Here the symbol ‘abracadabra’ ;; is the symbol whose value is examined. (let ((abracadabra 'foo)) (symbol-value 'abracadabra)) ⇒ foo Why does this throw an error with lexical binding? The variable is…