Re: antlr-mode.el - need some support by python.el

[Dmitry Gutov]

On 03/10/2015 03:16 AM, Stefan Monnier wrote:

> I'm not sure what you mean by that question: if the outer mode uses
> narrowing to specify the bounds of the chunk, then indentation code
> can't use `widen'.  Use of narrowing inside the indentation code will be
> fine, but use of widen will not.  Yet, "grep widen lisp/progmodes/*.el"
> suggests that it's probably used by several indenters.

The same places that use `widen' now would have to be adapted anyway, 
whether not to use it at all, or to behave according to the new variable.

The former change sounds simpler to me.

> I think specifying the chunk bounds via some dynamically-scoped var is
> a pretty safe option.  Maybe it will be supplanted in the future by some
> other alternative, but it doesn't impose any particular implementation
> constraint, contrary to the use of narrowing.

What do you think of `prog-narrow-to-region' and `prog-widen'?

Just having a dynamically-scoped var by itself seems a more verbose and 
error-prone approach to me.