org-element: Function mapped through org-element-map accepts only one argument

* contrib/lisp/org-element.el (org-element-map): Remove use of an
  alternate communication channel.  Function is now called with only
  one argument.
* contrib/lisp/org-export.el (org-export-collect-tree-properties):
(org-export-collect-headline-numbering, org-export--selected-trees,
org-export-collect-footnote-definitions,
org-export-footnote-first-reference-p,
org-export-get-footnote-number, org-export-resolve-fuzzy-link,
org-export-resolve-id-link, org-export-resolve-ref-link,
org-export-resolve-coderef, org-export-get-ordinal,
org-export-get-loc, org-export-collect-headlines): Apply changes.
* EXPERIMENTAL/org-e-ascii.el (org-e-ascii--unique-links): Apply
  changes.
* EXPERIMENTAL/org-e-publish.el (org-e-publish-collect-index): Apply
  changes.

EXPERIMENTAL/org-e-ascii.el

@@ -809,7 +809,7 @@ the following section and in any inlinetask's title there."
      (funcall harvest-links-in-title headline)
      ;; Get all links in SECTION.
      (org-element-map
-      section 'link (lambda (link local) (funcall unique-link-p link)) info))))
+      section 'link (lambda (link) (funcall unique-link-p link)) info))))
 
 (defun org-e-ascii--describe-links (links width info)
   "Return a string describing a list of links.

EXPERIMENTAL/org-e-publish.el

@@ -975,11 +975,11 @@ keyword."
    (delete-dups
     (org-element-map
      tree 'keyword
-     (lambda (k local)
+     (lambda (k)
        (when (string= (downcase (org-element-property :key k))
 		      "index")
 	 (let ((index (org-element-property :value k))
-	       (parent (org-export-get-parent-headline k local)))
+	       (parent (org-export-get-parent-headline k info)))
 	   (list index (plist-get info :input-file) parent))))
      info)))
   ;; Return parse-tree to avoid altering output.

contrib/lisp/org-element.el

@@ -2897,9 +2897,7 @@ cdr a plist of keywords and values."
 ;; The (almost) almighty `org-element-map' allows to apply a function
 ;; on elements or objects matching some type, and accumulate the
 ;; resulting values.  In an export situation, it also skips unneeded
-;; parts of the parse tree, transparently walks into included files,
-;; and maintain a list of local properties (i.e. those inherited from
-;; parent headlines) for function's consumption.
+;; parts of the parse tree.
 
 (defun org-element-parse-buffer (&optional granularity visible-only)
   "Recursively parse the buffer and return structure.
@@ -2950,9 +2948,8 @@ the current buffer."
 DATA is the parsed tree, as returned by, i.e,
 `org-element-parse-buffer'.  TYPES is a symbol or list of symbols
 of elements or objects types.  FUN is the function called on the
-matching element or object.  It must accept two arguments: the
-element or object itself and a plist holding contextual
-information.
+matching element or object.  It must accept one arguments: the
+element or object itself.
 
 When optional argument INFO is non-nil, it should be a plist
 holding export options.  In that case, parts of the parse tree
@@ -3004,16 +3001,15 @@ Nil values returned from FUN are ignored in the result."
 		  nil
 		  ,@(org-element-property
 		     (cdr (assq --type org-element-secondary-value-alist))
-		     --blob))
-		info))
+		     --blob))))
 	     (when (memq --type types)
-	       (let ((result (funcall fun --blob info)))
+	       (let ((result (funcall fun --blob)))
 		 (cond ((not result))
 		       (first-match (throw 'first-match result))
 		       (t (push result --acc))))))))
 	 (--walk-tree
 	  (function
-	   (lambda (--data info)
+	   (lambda (--data)
 	     ;; Recursively walk DATA.  INFO, if non-nil, is
 	     ;; a plist holding contextual information.
 	     (mapc
@@ -3042,10 +3038,10 @@ Nil values returned from FUN are ignored in the result."
 		   ;; Recursion is possible and allowed: Maybe apply
 		   ;; FUN to --BLOB, then move into it.
 		   (t (funcall --check-blob --type types fun --blob info)
-		      (funcall --walk-tree --blob info)))))
+		      (funcall --walk-tree --blob)))))
 	      (org-element-contents --data))))))
     (catch 'first-match
-      (funcall --walk-tree data info)
+      (funcall --walk-tree data)
       ;; Return value in a proper order.
       (reverse --acc))))
 

contrib/lisp/org-export.el

@@ -1286,7 +1286,7 @@ Following tree properties are set:
    `(:parse-tree
      ,data
      :target-list
-     ,(org-element-map data 'target (lambda (target local) target) info)
+     ,(org-element-map data 'target 'identity info)
      :headline-numbering ,(org-export-collect-headline-numbering data info)
      :back-end ,backend)
    info))
@@ -1321,9 +1321,9 @@ associated numbering \(in the shape of a list of numbers\)."
     (org-element-map
      data
      'headline
-     (lambda (headline info)
+     (lambda (headline)
        (let ((relative-level
-	      (1- (org-export-get-relative-level headline info))))
+	      (1- (org-export-get-relative-level headline options))))
 	 (cons
 	  headline
 	  (loop for n across numbering
@@ -1391,7 +1391,7 @@ INFO is a plist holding export options."
 		     (setq selected-trees
 			   (append
 			    (cons data genealogy)
-			    (org-element-map data 'headline (lambda (h p) h))
+			    (org-element-map data 'headline 'identity)
 			    selected-trees))
 		   ;; Else, continue searching in tree, recursively.
 		   (funcall walk-data data (cons data genealogy))))))))))
@@ -2458,11 +2458,11 @@ ignored."
     ;; Collect seen references in REFS.
     (org-element-map
      data 'footnote-reference
-     (lambda (footnote local)
-       (when (org-export-footnote-first-reference-p footnote local)
-	 (list (org-export-get-footnote-number footnote local)
+     (lambda (footnote)
+       (when (org-export-footnote-first-reference-p footnote info)
+	 (list (org-export-get-footnote-number footnote info)
 	       (org-element-property :label footnote)
-	       (org-export-get-footnote-definition footnote local))))
+	       (org-export-get-footnote-definition footnote info))))
      info)))
 
 (defun org-export-footnote-first-reference-p (footnote-reference info)
@@ -2476,7 +2476,7 @@ INFO is the plist used as a communication channel."
 	 footnote-reference
 	 (org-element-map
 	  (plist-get info :parse-tree) 'footnote-reference
-	  (lambda (footnote local)
+	  (lambda (footnote)
 	    (when (string= (org-element-property :label footnote) label)
 	      footnote))
 	  info 'first-match)))))
@@ -2496,7 +2496,7 @@ INFO is the plist used as a communication channel."
   (let ((label (org-element-property :label footnote)) seen-refs)
     (org-element-map
      (plist-get info :parse-tree) 'footnote-reference
-     (lambda (fn local)
+     (lambda (fn)
        (let ((fn-lbl (org-element-property :label fn)))
 	 (cond
 	  ((and (not fn-lbl) (equal fn footnote)) (1+ (length seen-refs)))
@@ -2674,7 +2674,7 @@ Assume LINK type is \"fuzzy\"."
 		(lambda (name data)
 		  (org-element-map
 		   data 'headline
-		   (lambda (headline local)
+		   (lambda (headline)
 		     (when (string=
 			    (org-element-property :raw-value headline)
 			    name)
@@ -2702,7 +2702,7 @@ is either \"id\" or \"custom-id\"."
   (let ((id (org-element-property :path link)))
     (org-element-map
      (plist-get info :parse-tree) 'headline
-     (lambda (headline local)
+     (lambda (headline)
        (when (or (string= (org-element-property :id headline) id)
                  (string= (org-element-property :custom-id headline) id))
          headline))
@@ -2718,7 +2718,7 @@ element whose `:name' property matches LINK's `:path', or nil."
   (let ((name (org-element-property :path link)))
     (org-element-map
      (plist-get info :parse-tree) org-element-all-elements
-     (lambda (el local)
+     (lambda (el)
        (when (string= (org-element-property :name el) name) el))
      info 'first-match)))
 
@@ -2731,7 +2731,7 @@ Return associated line number in source code, or REF itself,
 depending on src-block or example element's switches."
   (org-element-map
    (plist-get info :parse-tree) '(src-block example)
-   (lambda (el local)
+   (lambda (el)
      (let ((switches (or (org-element-property :switches el) "")))
        (with-temp-buffer
          (insert (org-trim (org-element-property :value el)))
@@ -2752,7 +2752,7 @@ depending on src-block or example element's switches."
               ((not (string-match "-[kr]\\>" switches)) ref)
               ((string-match "-n\\>" switches) (line-number-at-pos))
 	      ((string-match "\\+n\\>" switches)
-	       (+ (org-export-get-loc el local) (line-number-at-pos)))
+	       (+ (org-export-get-loc el info) (line-number-at-pos)))
               (t ref)))))))
    info 'first-match))
 
@@ -2827,7 +2827,7 @@ like inline images, which are a subset of links \(in that case,
     ;; Increment counter until ELEMENT is found again.
     (org-element-map
      data (or types (org-element-type element))
-     (lambda (el local)
+     (lambda (el)
        (cond
         ((equal element el) (1+ counter))
 	((not predicate) (incf counter) nil)
@@ -2854,7 +2854,7 @@ ELEMENT is excluded from count."
     (org-element-map
      (plist-get info :parse-tree)
      `(src-block example-block ,(org-element-type element))
-     (lambda (el local)
+     (lambda (el)
        (cond
         ;; ELEMENT is reached: Quit the loop.
         ((equal el element) t)
@@ -3095,9 +3095,9 @@ Return a list of all exportable headlines as parsed elements."
   (org-element-map
    (plist-get info :parse-tree)
    'headline
-   (lambda (headline local)
+   (lambda (headline)
      ;; Strip contents from HEADLINE.
-     (let ((relative-level (org-export-get-relative-level headline local)))
+     (let ((relative-level (org-export-get-relative-level headline info)))
        (unless (and n (> relative-level n)) headline)))
    info))
 
@@ -3117,7 +3117,7 @@ value when that element should be collected.
 Return a list of all elements found, in order of appearance."
   (org-element-map
    (plist-get info :parse-tree) type
-   (lambda (element local)
+   (lambda (element)
      (and (or (org-element-property :caption element)
 	      (org-element-property :name element))
 	  (or (not predicate) (funcall predicate element))