uiop:with-deprecation

(uiop:with-deprecation (level) definitions...)

Establishes the definitions it wraps, exactly as written, and returns the last one's value. Real UIOP additionally marks them as deprecated so that a later caller gets a warning at level.

rontolisp drops that diagnostic. There is no deprecation-warning machinery and no compile-time warning channel to route one through, so the honest lowering is (progn definitions...) — the level form is evaluated by nothing and ignored. A library that wraps part of its API in this macro therefore loads and runs normally; you simply never hear that a name is on its way out.

The expansion splices at top level, so wrapped top-level defuns stay top-level definitions on the compile backends (that is the shape libraries use, usually inside an eval-when).

uiop is ASDF's portability layer, not part of Common Lisp: the name is only reachable with the uiop: qualifier.

Backend support

Works on all four backends: it is a built-in macro expansion shared by the interpreter and both compilers. Like the other built-in macros it has no function value (#'uiop:with-deprecation is an error).