[Emacs-ada-mode] [Ada-mode] ada-xref.el -- command/function 'ada-find-file'

[ESCOUFLAIRE Pierre-Louis]

Stephen Leake wrote:
> ESCOUFLAIRE Pierre-Louis <...> writes:
>>While using the ada-find-file function released with emacs-22.1, 
> 
> There is a mailing list for ada-mode
> (http://stephe-leake.org/mailman/listinfo/emacs-ada-mode_stephe-leake.org)
> ; others might be having a similar problem, so it is best to post this
> sort of thing there.
> 

Hello,
I was not aware of it, please accept my apologies.


>>I found the following error:
>>
>>Debugger entered--Lisp error: (wrong-type-argument stringp nil)
>>   file-name-as-directory(nil)
>>   ada-find-file-in-dir("filename.adb" (nil "." ...<directories>...))
>>   ada-find-src-file-in-dir("filename.adb")
>>   ada-find-file("filename.adb")
>>   call-interactively(ada-find-file)
>>   execute-extended-command(nil)
>>   call-interactively(execute-extended-command)
>>
>>
>>After few investigation, I found that the function 'ada-find-src-file'
>>does a call to 'ada-xref-get-src-dir-field'.
>>This last function is concatenating strings representing directories
>>into a list. The problem is that the first element of this list, which
>>is nil, is given as a parameter to 'filename-as-directory' that raise
>>the previous error.
>>
>>I think that a simple workaround to this is to change the function
>>'ada-xref-get-src-dir-field' to not concatenate 'nil' strings to the
>>list by simply adding a test case like shows the following elisp
>>code:
> 
> 
> That's a band-aid. The real problem is that there should not be a
> `nil' in the list of directories in the first place.
> 
> Are you using Emacs ada-mode project files? With or without GNAT
> project files?
> 
> How are you setting up your list of Ada directories? 

There is no project files (no .adp, no .gpr) and the list of Ada 
directories is set up through ADA_INCLUDE_PATH and ADA_OBJECTS_PATH 
environment variables.

As far as I can see, the call to 'ada-xref-get-project-field' function 
retrieves the variable 'src_dir' value which is 'nil' according to the 
algorithm.


Regards,
Pierre-Louis ESCOUFLAIRE

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