new: make-snippet makes an anonymous snippet lambda

bug: apparently broke edebug though

snippet.el

@@ -217,58 +217,13 @@ I would need these somewhere in the let* form
      ,(or transform-form
           'field-text)))
 
-
-(defmacro define-snippet (name _args &rest body)
-  "Define NAME as a snippet-inserting function.
-
-NAME's function definition is set to a function with no arguments
-that inserts the fields components at point.
-
-Each form in BODY can be:
-
-* A cons (field FIELD-NAME FIELD-VALUE FIELD-TRANSFORM)
-  definining a snippet field. A snippet field can be navigated to
-  using `snippet-next-field' and
-  `snippet-prev-field'. FIELD-TRANSFORM is currently
-  unimplemented.
-
-* A cons (mirror FIELD-NAME MIRROR-TRANSFORM) defining a mirror
-  of the field named FIELD-NAME. Each time the text under the
-  field changes, the form MIRROR-TRANSFORM is invoked with the
-  variable `field-text' set to the text under the field. The
-  string produced become the text under the mirror.
-
-* A string literal which is inserted as a literal part of the
-  snippet and remains unchanged while the snippet is navigated.
-
-* A symbol designating a function which is called when the
-  snippet is inserted. The string produced is treated as a
-  literal string.
-
-* A lambda form taking no arguments, called when the snippet is
-  inserted. Again, the string produced is treated as a literal
-  snippet string.
-
-ARGS is an even-numbered property list of (KEY VAL) pairs. KEY
-can be:
-
-* the symbol `:obarray', in which case the symbol NAME in
-  interned in the obarray VAL instead of the global obarray. This
-  options is currently unimplemented."
-  (declare (debug (&define name sexp &rest &or
-                           ("lambda" sexp def-form) ; curiously, function-form
-                                                    ; doesn't work here
-
-                           functionp
-                           sexp
-                           ("mirror" sexp def-form)
-                           ("field" sexp form))))
+(defun define--snippet-body (body)
+  "Does the actual work for `define-snippet'"
   (let* ((sym-tuples (snippet--form-sym-tuples body))
          (marker-init-forms (snippet--make-marker-init-forms sym-tuples))
          (init-object-forms (snippet--init-field-and-mirror-forms sym-tuples))
          (first-field-sym (snippet--first-field-sym sym-tuples)))
-    `(defun ,name ()
-       (let* (,@(mapcar #'first init-object-forms)
+    `(let* (,@(mapcar #'first init-object-forms)
             ,@marker-init-forms)
 
        ,@(mapcar #'second init-object-forms)
@@ -310,7 +265,59 @@ can be:
                                             sym-tuples))))
        ,(if first-field-sym
             `(snippet--move-to-field ,first-field-sym))
-         (add-hook 'post-command-hook 'snippet--post-command-hook t t)))))
+       (add-hook 'post-command-hook 'snippet--post-command-hook t t))))
+
+
+(cl-defmacro define-snippet (name () &rest body)
+  "Define NAME as a snippet-inserting function.
+
+NAME's function definition is set to a function with no arguments
+that inserts the fields components at point.
+
+Each form in BODY can be:
+
+* A cons (field FIELD-NAME FIELD-VALUE FIELD-TRANSFORM)
+  definining a snippet field. A snippet field can be navigated to
+  using `snippet-next-field' and
+  `snippet-prev-field'. FIELD-TRANSFORM is currently
+  unimplemented.
+
+* A cons (mirror FIELD-NAME MIRROR-TRANSFORM) defining a mirror
+  of the field named FIELD-NAME. Each time the text under the
+  field changes, the form MIRROR-TRANSFORM is invoked with the
+  variable `field-text' set to the text under the field. The
+  string produced become the text under the mirror.
+
+* A string literal which is inserted as a literal part of the
+  snippet and remains unchanged while the snippet is navigated.
+
+* A symbol designating a function which is called when the
+  snippet is inserted. The string produced is treated as a
+  literal string.
+
+* A lambda form taking no arguments, called when the snippet is
+  inserted. Again, the string produced is treated as a literal
+  snippet string.
+
+ARGS is an even-numbered property list of (KEY VAL) pairs. KEY
+can be:
+
+* the symbol `:obarray', in which case the symbol NAME in
+  interned in the obarray VAL instead of the global obarray. This
+  options is currently unimplemented."
+  (declare (debug (&define name sexp &rest &or
+                           ;; curiously, function-form doesn't work here
+                           ;;
+                           ("lambda" sexp def-form)
+                           sexp
+                           ("mirror" sexp def-form)
+                           ("field" sexp))))
+  `(defun ,name ()
+     ,(define--snippet-body body)))
+
+(cl-defmacro make-snippet (&rest body)
+  "Same as `define-snippet', but return an anonymous function."
+  `(lambda () ,(define--snippet-body body)))
 
 
 ;;; Snippet mechanics
@@ -323,7 +330,8 @@ can be:
   next-field
   prev-field)
 
-(defun snippet--init-field (object name start end parent-field mirrors next-field prev-field)
+(defun snippet--init-field (object name start end parent-field mirrors
+                                   next-field prev-field)
   (setf (snippet--field-name object) name
         (snippet--field-start object) start
         (snippet--field-end object) end