let else

topics

See graveyard.

• static assertions
• num cpus
• offset_of!
• justfiles
• time - jiff vs chrono vs time
• xtask and xshell
• project organization
• extension_trait
• global initialization - lazy_static vs once_cell vs std
  • lazy_static -> LazyLock
  • lazy_static can be used with a spin lock
  • OnceLock is in std
  • static mutexes
• teporary dirs and files
  • CARGO_TARGET_TMPDIR
• error handling
• ideomatic casting
• ideomatic math
• const generics
• matches!, todo!, etc
• non_exhaustive