Lot of warnings with -Weverything flag

[3Hren]

Hi!

Compiling with -Weverything produces a lot of warnings. Half of them are -Wsign-conversion, some -Wswitch-enum, some -Wunused-member-function.

Either I can try to fix it myself or to enclose them with pragmas or to wait for your participation.

[vitaut]

Hello!
Are you talking about Clang's -Weverything? If it enables all warnings this will probably give lots of false positives (warnings with lower rates of false positives included in -Wall and -Wextra should be addressed already). That said, PRs that fix or suppress these warnings are welcome.

[vitaut]

Sign conversion warnings should be fixed now (#281).

[vitaut]

format.h is warning-free as of a201c61. However, -Weverything has too much noise, so warnings elsewhere, if any, better be addressed case-by-case.