DEFCONSTANTThe initial value is not evaluated at compile time,
just like with DEFVAR and DEFPARAMETER.
Use EVAL-WHEN if you need the value at compile time.
constant variables may not be bound dynamically or lexically.
See also Section 3.3.2, “Declaration EXT:CONSTANT-NOTINLINE”.
If you need to undo a DEFCONSTANT form, PROCLAIM the symbol
SPECIAL (to turn the constant variable into a dynamic variable), and then
PROCLAIM it EXT:NOTSPECIAL (to turn the dynamic variable into a lexical variable).
CUSTOM:*SUPPRESS-SIMILAR-CONSTANT-REDEFINITION-WARNING*If the variable is already bound to a value which is not EQL to
the new value, a WARNING is issued. If, however, the new value
is “visually similar” (prints to the same string, as is
commonly the case when re-loading files) to the old one, the warning
can be suppressed by setting CUSTOM:*SUPPRESS-SIMILAR-CONSTANT-REDEFINITION-WARNING* to a
non-NIL value.
| These notes document CLISP version 2.45 | Last modified: 2008-05-14 |