In this case, the signature constraint on opDispatch could be
used for
auto completion:
auto opDispatch(string field)()
if (is(typeof(__traits(getMember, t, field))))
...
From the signature constraint, it should be obvious that
"field" must be
among the members of t.
Of course, checking signature constraints isn't always
practical in the
general case where it may be arbitrarily complex, but obvious
cases like
this one should be easily manageable, no?
In this case auto completion could work flawless because of
alias this t;
At least for cases where even a frontend based tool has a hard
time, we could introduce a ddoc section for this, if there really
is a need.
/**
* Dispatch method call.
* Completion: LIKE t
*/
auto opDispatch(string field)() { ... }
If phobos does this consistently the tools will recognize this.
