Re: Compilation error regexp alist doesn't match my compiler anymor

[Arjan Bos]

Michael Slass wrote:

> ,----[ C-h v compilation-error-regexp-alist RET ]
> | compilation-error-regexp-alist's value is shown below.
> | 
> | Documentation:
> | Alist that specifies how to match errors in compiler output.
> | Each elt has the form (REGEXP FILE-IDX LINE-IDX [COLUMN-IDX FILE-FORMAT...])
> | If REGEXP matches, the FILE-IDX'th subexpression gives the file name, and
> | the LINE-IDX'th subexpression gives the line number.  If COLUMN-IDX is
> | given, the COLUMN-IDX'th subexpression gives the column number on that line.
> | If any FILE-FORMAT is given, each is a format string to produce a file name to
> | try; %s in the string is replaced by the text matching the FILE-IDX'th
> | subexpression.
> | 
> | Defined in `compile'.
> | 
> | Value:
> | <snip>
> `----
>
> I don't know how much that has changed in the cvs version of emacs,
> but the explanation below should let you adapt.
I know that it should be sufficient, but I never put enough effort in 
learning lists in lisp. But it has changed a lot since my previous 
snapshot (last march).


> So, you're pretty close: you've got a regex which captures your
> filename (and, incorrectly, the trailing colon) into subexp 1, and the
> line number in subexp 2.  You want to add an element to
> compilation-error-regexp-alist that includes your regex, the capture
> index of the filename, and the capture index of the line number, in
> that order:
> ( "^\\(.*\\.nrx\\):[ \\t]*\\([0-9]+\\)" 1 2)
>   --- note the colon moved outside the capture parens
Hmm, should have noticed that meself.
> Then you want to add the little list above to the place where
> compile-mode will find it, compilation-error-regexp-alist.  You do
> that with a function called add-to-list
>   
> Try this:
>
> (add-to-list
>  'compilation-error-regexp-alist
>  '("^\\(.*\\.nrx\\):[ \\t]*\\([0-9]+\\)" 1 2))
>
> Make sense?
Yes, thanks a lot, the add-to-list form was missing from my lisp vocabulary.
It does indeed work now.

However, its new value is now (("^\\(.*\\.nrx\\):[ \\t]*\\([0-9]+\\)" 1 
2) absoft ada aix ant bash borland caml comma edg-1 edg-2 epc ...)

Where the names somehow point to entries in 
compilation-error-regexp-alist-alist. So I got lost in thinking that I 
should add a name in compilation-error-regexp-alist and the regexp in 
compilation-error-regexp-alist-alist.

Let's hope this current solution is future proof.
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