Re: xref-query-replace

[Dmitry Gutov]

On 01/09/2016 11:40 PM, Eli Zaretskii wrote:

> I don't really understand why.

If you have a set of matches for a C++ method A::C#foo, what value 
should xref-match-length return for each of them? Can you tell that 
value in advance, just based on the method's qualified name?

> But if you insist, the only way to
> explain this is to explicitly mention all the commands that produce
> "good" XREF buffers in the error message.  Yes, it will be a long
> one.  But that's not a catastrophe.

Technically, this list is an open one: anyone can call xref--show-xrefs 
with a list of appropriate values. This function, or one like it, should 
be public in some next release.

If we define a collective term for such xref functions, we could mention 
it in their docstrings.