On Wednesday, 30 August 2017 at 14:05:40 UTC, Mark wrote:
I see that in the previous review rounds some people suggested
various keywords for designating the return value of a function
("return", "result", ...) in an `out` contract. What about
using a plain old underscore? For example:
int abs(int x)
out(_ >= 0)
{
return x>0 ? x : -x;
}
I think it's good to be consistent with existing out contracts
which require declaring the variable first. The identifier
`__result` currently works, but the thing is, it takes fewer
characters to write `out(r; r >= 0)` than to write `out(;__result
>= 0)` (or `out(__result >= 0)`). The possibility of using a
single character as the return identifier makes it hard, in my
opinion, to justify complaints about the syntax being "too
verbose."
