[Issue 14367] Print warnings by default

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=14367

--- Comment #5 from Don <clugdbug at yahoo.com.au> ---
I think this bug should be closed as invalid. As stated in comment 3, warnings
and deprecations are two very different things. The bug report is based on the
misconception that they are the same.

deprecation = this code used to be correct, but now it is an error. The code
must be fixed, but it is not urgent.
warning = the code might be perfectly correct.

Bearophile's comment 4 is something different. It is a real issue. I think it
would best be fixed by removing warnings from the compiler entirely (which is
in practice what Bearophile is asking for, if they are enabled by default they
are just errors). The whole idea of an "optional error" is absurd. If a single
library does not compile without warnings, then the app cannot be compiled with
warnings enabled either. So warnings are usable only if all libraries respect
them, which means they are not optional for libraries! But that is a discussion
for a different place.

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