On Sunday, September 27, 2015 at 8:46:34 PM UTC-5, David Fishburn wrote:
> VIM - Vi IMproved 7.4 (2013 Aug 10, compiled Sep 23 2015 09:51:11)
> MS-Windows 32-bit GUI version with OLE support
> Included patches: 1-873
> 
> 
> I am making a remote_send() call to a different server and I really want to 
> get the value returned from the function I am calling.
> 
> 
> The help indicates I can do this:
> :h remote_send()
> 
> 
> 
> 
> 
> call remote_send( g:remotediff_servername, ":call MyFunc( '".a:filename1."' 
> )\<CR>", "firstfile_bufnr" )
> call remote_read(firstfile_bufnr) 
> echomsg "remote_read:" firstfile_bufnr
> 
> 
> 
> 
> Problem is, we never get to the echomsg statement.  Vim just hangs forever.
> 
> 
> If I don't use the remote_read() everything functions correctly, except I do 
> not get the return code from the function I called.
> 
> 
> Anyone have any suggestions?
> 

The way I'm reading the help, I have two suggestions:

It looks like for this to work, your "MyFunc" function will need to call 
server2client() internally. The value you send with this function should be 
received by your remote_read call. Is this how you MyFunc works, or are you 
expecting to receive the return value instead? Note that the :call command does 
not have any mechanism to get the return value.

My second suggestion is that remote_read *returns* the value received from the 
server, but it looks like you're trying to access the return value by reading 
the firstfile_bufnr variable. This is incorrect. In your example, 
firstfile_bufnr is updated by remote_send to store a server ID, it is used *as* 
a server ID in your remote_read call, but the variable name and its presence in 
your echomsg command indicate you expect it to be something else (presumably 
the return value of MyFunc).

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