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-rw-r--r--lisp/json.el19
1 files changed, 16 insertions, 3 deletions
diff --git a/lisp/json.el b/lisp/json.el
index 468358ccd1..f1ee3a5203 100644
--- a/lisp/json.el
+++ b/lisp/json.el
@@ -174,6 +174,10 @@ this around your call to `json-read' instead of `setq'ing it.")
(put 'json-string-format 'error-conditions
'(json-string-format json-error error))
+(put 'json-key-format 'error-message "Bad JSON object key")
+(put 'json-key-format 'error-conditions
+ '(json-key-format json-error error))
+
(put 'json-object-format 'error-message "Bad JSON object")
(put 'json-object-format 'error-conditions
'(json-object-format json-error error))
@@ -321,6 +325,15 @@ representation will be parsed correctly."
"Return a JSON representation of STRING."
(format "\"%s\"" (mapconcat 'json-encode-char string "")))
+(defun json-encode-key (object)
+ "Return a JSON representation of OBJECT.
+If the resulting JSON object isn't a valid JSON object key,
+this signals `json-key-format'."
+ (let ((encoded (json-encode object)))
+ (unless (stringp (json-read-from-string encoded))
+ (signal 'json-key-format (list object)))
+ encoded))
+
;;; JSON Objects
(defun json-new-object ()
@@ -395,7 +408,7 @@ Please see the documentation of `json-object-type' and `json-key-type'."
(maphash
(lambda (k v)
(push (format "%s:%s"
- (json-encode k)
+ (json-encode-key k)
(json-encode v))
r))
hash-table)
@@ -409,7 +422,7 @@ Please see the documentation of `json-object-type' and `json-key-type'."
(format "{%s}"
(json-join (mapcar (lambda (cons)
(format "%s:%s"
- (json-encode (car cons))
+ (json-encode-key (car cons))
(json-encode (cdr cons))))
alist)
", ")))
@@ -418,7 +431,7 @@ Please see the documentation of `json-object-type' and `json-key-type'."
"Return a JSON representation of PLIST."
(let (result)
(while plist
- (push (concat (json-encode (car plist))
+ (push (concat (json-encode-key (car plist))
":"
(json-encode (cadr plist)))
result)