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Diffstat (limited to 'Lisp/libobjcl.lisp')
| -rw-r--r-- | Lisp/libobjcl.lisp | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/Lisp/libobjcl.lisp b/Lisp/libobjcl.lisp index 0858cb9..89930b8 100644 --- a/Lisp/libobjcl.lisp +++ b/Lisp/libobjcl.lisp @@ -375,6 +375,22 @@ conventional case for namespace identifiers in Objective-C." (cffi:pointer-eq pointer (objcl-get-nil)))) +(defun objc-null (value) + (or (null value) + (and (typep value 'c-pointer-wrapper) + (objc-pointer-null (pointer-to value))))) + + +(defmacro objc-or (&rest forms) + (let ((sym (gensym))) + `(let ((,sym ,(first forms))) + (if (objc-null ,sym) + ,(if (rest forms) + `(objc-or ,@(rest forms)) + 'nil) + ,sym)))) + + (declaim (ftype (function (string) (or null selector)) find-selector-by-name)) (defun find-selector-by-name (selector-name) |