Op bang

# `!` is free to declare as a custom operator, as `^` and `|` are (`operators.md`): between two values,
# declared, it is an operator like any other. Its old meaning, `! 'x'` for `not 'x'`, stays refused,
# naming `not`. (`&` was free too until 2026-10-14, when it became the language's own `and`.)

# a over b: how many times b fits in a
op ! ['a': int32, 'b': int32] -> int32 { return 'a' div.floor 'b'; }

MAIN {
    std::print.useful[(17 ! 5), newln];
    std::print.useful[not true, newln];
}