[dmd-internals] [D-Programming-Language/dmd] 588161: Add option to show deprecated errors as warnings

[Jonathan M Davis]

On Sunday, November 11, 2012 23:15:56 GitHub wrote:
>   Add option to show deprecated errors as warnings

I would point out that while this is nice, what we really need is for this to 
be the default and for deprecated to generate errors only when the appropriate 
flag is given. Without that, deprecating something will immediately break any 
code which uses the deprecated symbol, making it so that any library 
(including Phobos) which wants to avoid breaking user code, can't use 
deprecated. On the other hand, if deprecated generates a warning by default, 
then anyone using the deprecated symbol will be warned about it and have the 
opportunity to fix it at their own leasure. It would then be possible to 
deprecate something and potentially leave it around for long periods of time 
before actually removing it (or maybe even leave it in permanently). As it is, 
almost the only difference between deprecating something and removing it is 
that when you deprecate it, you get a message telling you that it was 
deprecated rather than that it's an unknown symbol.

So, this change is backwards.

- Jonathan m Davis