Discarded return values

[Simen Kjærås]

On Tuesday, 30 January 2018 at 11:36:25 UTC, Jonathan M Davis 
wrote:
> [nope]

Thanks. It's what I thought, though not what I wanted.

> IIRC, the Weka guys wanted to be able to have attributes tell 
> the compiler stuff so that it could yell at the programmer when 
> appropriate, so I think that there is some interest in this 
> area, but I have no idea how such a thing would be implemented. 
> New built-in attributes that warn about specific stuff could 
> certainly be added, but in each case, there would have to be a 
> solid enough argument as to why it was worth adding that 
> further complication to the language. I have no idea what the 
> chances of being accepted would be for a DIP specifically for 
> an attribute to warn if the return value is ignored, but you 
> can certainly create such a DIP if you feel strongly enough 
> about it and feel that you can argue it well.

It's been on my mind for years, so it probably will happen 
eventually. Can't promise this is the year, though.

--
   Simen