RFR: Enable All Compiler Warnings #373
Description
Currently Level-4 warnings are enabled, however that does not include signed-unsigned implicit conversion warning which I believe is crucial.
However, WAll cannot be enabled easily since compiler will throw a lot of warnings for the std lib.
Therefore, excludes and/or warning suppression shall be also defined before this.
I also think probably we should upgrade Visual Studio first because probably MS has already fixed such warnings in the std lib so then we have to make less suppressions.