G. Sliepen questions

G. Sliepen answers

• Enforcing a common interface with std::variant without inheritance
• Using scanf/printf to input into/output from a bitset
• Montgomery multiplication on PC with word-size moduli. Is it worth it?
• Capping & Calculating FPS in SDL?
• What are the implications of constexpr floating-point math?
• returning string_view from function
• Makefile : select files by extension, from a variable
• Why running std::thread with empty function spend a lot of memory
• How to update multiple fields of a struct simultaneously?
• IOCCC 1984/decot.c - can it be compiled in the 21st century?