Re: Is there a way of setting a variable only when it exists?

[Michael Heerdegen]

Marcin Borkowski <mbork@mbork.pl> writes:

> I'd like to be able to say something like
> 
> (setq-safe hello "world")
> 
> so that `hello' is set to `"world"' if it is an existing variable (e.g.,
> defined by `defvar') and an error is raised if `hello' does not exist.

Byte compiling can help with things like name changes.

> I assume it would be fairly easy to code such a macro (using `boundp'),

Maybe rather using `special-variable-p'?

Michael.