Re: Eliminating Singleton Objects

[John W. Eaton]

On 04/28/2017 07:04 AM, Olaf Till wrote:
> On Tue, Apr 25, 2017 at 03:43:20PM -0400, John W. Eaton wrote:
> > One question is what should happen to DEFUN functions called using feval?
> > We can provide an interpreter::feval method that can pass a pointer to the
> > interpreter object, but the current feval function would not do that.  Is
> > this a problem for existing user code
>
> Probably yes, at least potentially.  In remote execution with the
> 'parallel' package, each command is executed with Octaves eval_string
> function.  The remotely executed command can principally call any
> function in any package, so it may call a package function which is
> already revised to access the loadpath via this planned pointer to the
> interpreter.

Any function that uses eval or feval has always needed the interpreter 
to exist ("interpreter" meaning the symbol table, load-path, etc.).  The 
difference is only whether those things are accessed globally or as 
members of an interpreter object.  If you are currently calling eval or 
feval, then the fix would be to call interpreter->eval or 
interpreter->feval instead.

jwe