|
The types array(), dict(), digraph(), gb_set(), gb_tree(), queue(),
set(), and tid() have been deprecated. They will be removed in OTP 18.0.
Instead the types array:array(), dict:dict(), digraph:graph(),
gb_set:set(), gb_tree:tree(), queue:queue(), sets:set(), and ets:tid()
can be used. (Note: it has always been necessary to use ets:tid().)
It is allowed in OTP 17.0 to locally re-define the types array(), dict(),
and so on.
New types array:array/1, dict:dict/2, gb_sets:set/1, gb_trees:tree/2,
queue:queue/1, and sets:set/1 have been added.
|
|
Dialyzer will warn if the value of list comprehension is
ignored by putting it in a sequence like this:
[SomeSideEffect(E) || E <- Es],
ok
To avoid a warning, you'll have to write:
_ = [SomeSideEffect(E) || E <- Es],
ok
Most of the time, this warning is merely annoying because it does
not point out any real errors.
Kostis Sagonas suggested that by suppressing the warning for
list comprehension that return a list of a simple type (e.g. ['ok']),
there would be no warning for code such as:
[io:format("~p\n", [E]) || E <- Es],
ok
but there would be still be a warning for:
[file:close(Fd) || Fd <- Fds],
ok
because an error condition is ignored.
|
