with-standard-io-syntax

(with-standard-io-syntax form...)

Binds *package* to cl-user and evaluates the body as a progn. In Common Lisp this macro dynamically rebinds the whole reader/printer control set to standard values so that a body reads and prints independently of the caller's settings; in rontolisp *package* is the one variable of that set with a run-time value to rebind (a body's intern/read homes in cl-user, as in Common Lisp). *read-default-float-format* is informational (every float shares the one double representation), *print-circle* and *readtable* exist so library code that reads them loads, and *print-escape*/*print-readably* exist and hold their standard values (t/nil) — *print-escape* is the one printer variable rontolisp really binds, around a print-object method call, so the method can tell prin1 from princ. The remaining printer-mode variables (*print-base*, ...) hold their standard values, and the reader variables (*read-base* and friends) do not exist at all, which amounts to being permanently standard.

Deviation: *print-escape*/*print-readably*/*print-pretty*, which the printer does honor, are not rebound here, so a non-standard binding of one of them around this form leaks into the body.