diff options
| -rw-r--r-- | formatters.lisp | 8 | ||||
| -rw-r--r-- | json-template.lisp | 16 |
2 files changed, 15 insertions, 9 deletions
diff --git a/formatters.lisp b/formatters.lisp index a16ad93..a183b59 100644 --- a/formatters.lisp +++ b/formatters.lisp @@ -23,7 +23,9 @@ (escapee-p (lambda (x) (member x escapees :test #'char=)))) (lambda (string) (unless (stringp string) - (setq string (format nil "~A" string))) + (typecase string + (null (setq string "")) + (t (setq string (format nil "~A" string))))) (with-output-to-string (out) (loop with position = 0 for escapee-pos = (position-if escapee-p string :start position) @@ -38,7 +40,9 @@ (defun escape-for-uri (string) (unless (stringp string) - (setq string (format nil "~A" string))) + (typecase string + (null (setq string "")) + (t (setq string (format nil "~A" string))))) (with-output-to-string (out) (map 'list (lambda (char) diff --git a/json-template.lisp b/json-template.lisp index 0abd91b..5607004 100644 --- a/json-template.lisp +++ b/json-template.lisp @@ -177,13 +177,15 @@ (write-string (second thing) stream)) (:variable (destructuring-bind (variable formatter) (cdr thing) - (let ((value (lookup-context contexts variable))) - (format stream "~A" - (if formatter - (funcall (cdr (assoc formatter *template-formatters* - :test #'equal)) - value) - value))))) + (let* ((value (lookup-context contexts variable)) + (formatted-value (if formatter + (funcall (cdr (assoc formatter *template-formatters* + :test #'equal)) + value) + value))) + (typecase formatted-value + (null (values)) + (t (format stream "~A" formatted-value)))))) (:section (destructuring-bind (section branch alternative) (cdr thing) (let ((value (lookup-context contexts section))) |