with-compilation-unit ([[option]]) form* => result*
option::= :override override
Arguments and Values:
override---a generalized boolean; evaluated. The default is nil.
forms---an implicit progn.
results---the values returned by the forms.
Executes forms from left to right. Within the dynamic environment of with-compilation-unit, actions deferred by the compiler until the end of compilation will be deferred until the end of the outermost call to with-compilation-unit.
The set of options permitted may be extended by the implementation, but the only standardized keyword is :override.
If nested dynamically only the outer call to with-compilation-unit has any effect unless the value associated with :override is true, in which case warnings are deferred only to the end of the innermost call for which override is true.
The function compile-file provides the effect of
(with-compilation-unit (:override nil) ...)around its code.
Any implementation-dependent extensions can only be provided as the result of an explicit programmer request by use of an implementation-dependent keyword. Implementations are forbidden from attaching additional meaning to a use of this macro which involves either no keywords or just the keyword :override.
If an implementation would normally defer certain kinds of warnings, such as warnings about undefined functions, to the end of a compilation unit (such as a file), the following example shows how to cause those warnings to be deferred to the end of the compilation of several files.
(defun compile-files (&rest files) (with-compilation-unit () (mapcar #'(lambda (file) (compile-file file)) files))) (compile-files "A" "B" "C")
Note however that if the implementation does not normally defer any warnings, use of with-compilation-unit might not have any effect.
Affected By: None.
Exceptional Situations: None.