DEFAULT-DEFUN-MODE

Major Section:  MISCELLANEOUS

When a defun is processed and no :mode xarg is supplied, the function default-defun-mode is used. To find the default defun-mode of the current ACL2 world, type (default-defun-mode (w state)). See defun-mode for a discussion of defun-modes. To change the default defun-mode of the ACL2 world, type one of the keywords :program or :logic.

The default ACL2 prompt displays the current default defun-mode by showing the character p for :program mode, and omitting it for :logic mode; see default-print-prompt. The default defun-mode may be changed using the keyword commands :program and :logic, which are equivalent to the commands (program) and (logic). Each of these names is documented separately: see program and see logic. The default defun-mode is stored in the table acl2-defaults-table and hence may also be changed by a table command. See table and also see acl2-defaults-table. Both mode-changing commands are events.

While events that change the default defun-mode are permitted within an encapsulate or the text of a book, their effects are local in scope to the duration of the encapsulation or inclusion. For example, if the default defun-mode is :logic and a book is included that contains the event (program), then subsequent events within the book are processed with the default defun-mode :program; but when the include-book event completes, the default defun-mode will still be :logic. Commands that change the default defun-mode are not permitted inside local forms.