It turns out that the machine is much better at the sort of boring mechanical tasks where thoroughness counts and imagination doesn't and so languages which do more, and more, and more checking pay off very well. Rust's borrowck is the obvious first thought today but say WUFFS will check that you've proved certain key properties, WUFFS doesn't need to insert runtime bounds checks for example because you've proved, before the code would compile, that you don't have any bounds misses. You might have proved it by writing bounds checks yourself of course, or likely you have an inherent mathematical rationale for why your algorithm has no misses, but either way the compiler checked your work.
alt Hacker News
"Strongly typed but weakly checked"
It turns out that the machine is much better at the sort of boring mechanical tasks where thoroughness counts and imagination doesn't and so languages which do more, and more, and more checking pay off very well. Rust's borrowck is the obvious first thought today but say WUFFS will check that you've proved certain key properties, WUFFS doesn't need to insert runtime bounds checks for example because you've proved, before the code would compile, that you don't have any bounds misses. You might have proved it by writing bounds checks yourself of course, or likely you have an inherent mathematical rationale for why your algorithm has no misses, but either way the compiler checked your work.