cljrs-builtins
Built-in functions for clojurust (the clojure.core-equivalent runtime
implemented in Rust, registered into a name → fn dispatch table).
Includes the unchecked-* integer arithmetic family — unchecked-add,
unchecked-subtract, unchecked-multiply, unchecked-inc, unchecked-dec,
unchecked-negate (and their -int aliases) — which wrap on overflow, in
contrast to the checked +/-/* (which throw on overflow at the IR/compiled
tiers and promote to BigInt in the tree-walk tier).