common warning id for double->object conversion

[Colin Macdonald]

[moving to maintainers list]

Summary: if you do `sym(1/3)` instead of `sym(1)/3`, we give a warning.

On 22/06/16 08:48, Oliver Heimlich wrote:
> There is the exactly same issue in the interval package. If you want
> to implement this feature in the construtors (maybe with a regexp
> to identify fractions and decimal numbers) we should use the same
> warning id.

Good idea.  Do you think its appropriate to use the "Octave" namespace?

Maybe something lke:

2. warning("Octave:possible-precision-loss", <custom message>)
3. warning("Octave:lossy-object-from-double", ...)

For `sym` objects its currently:

warning('OctSymPy:sym:rationalapprox', ...
  'Using rat() heuristics for double-precision input (is this what you
wanted?)');

(but I'm happy to change it).

Colin