[PATCH] Send table rows to OCaml as tuples

[necaris@gmail.com]

From: Rami Chowdhury <necaris@gmail.com>

Previously, tables (i.e. lists-of-lists) came through as
arrays-of-arrays. Since OCaml arrays are required to be homogeneous in
their types, this meant tables with heterogenous types within a row
could not be handled. This change represents tables as arrays of tuples,
which is more flexible, while preserving the previous behavior for
lists.

* lisp/ob-ocaml.el (org-babel-ocaml-elisp-to-ocaml-tuple,
org-babel-ocaml-elisp-to-ocaml-array, org-babel-elisp-to-ocaml): Send
table rows as tuples
---
 lisp/ob-ocaml.el | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/lisp/ob-ocaml.el b/lisp/ob-ocaml.el
index 80df795..ad7df97 100644
--- a/lisp/ob-ocaml.el
+++ b/lisp/ob-ocaml.el
@@ -123,11 +123,23 @@
 			  (org-babel-ocaml-elisp-to-ocaml (cdr pair))))
    (org-babel--get-vars params)))
 
+(defun org-babel-ocaml-elisp-to-ocaml-tuple (val &optional nested-renderer-f)
+  "Return OCaml evaluating to VAL, with elements rendered by NESTED-RENDERER-F."
+  (let ((renderer (or nested-renderer-f #'org-babel-ocaml-elisp-to-ocaml)))
+    (concat "(" (mapconcat renderer val ", ") ")")))
+
+(defun org-babel-ocaml-elisp-to-ocaml-array (val &optional nested-renderer-f)
+  "Return OCaml evaluating to VAL, with elements rendered by NESTED-RENDERER-F."
+  (let ((renderer (or nested-renderer-f #'org-babel-ocaml-elisp-to-ocaml)))
+    (concat "[|" (mapconcat renderer val "; ") "|]")))
+
 (defun org-babel-ocaml-elisp-to-ocaml (val)
   "Return a string of ocaml code which evaluates to VAL."
-  (if (listp val)
-      (concat "[|" (mapconcat #'org-babel-ocaml-elisp-to-ocaml val "; ") "|]")
-    (format "%S" val)))
+  (cond ((and (listp val) (listp (car val)))
+           (org-babel-ocaml-elisp-to-ocaml-array val #'org-babel-ocaml-elisp-to-ocaml-tuple))
+         ((listp val)
+           (org-babel-ocaml-elisp-to-ocaml-array val))
+        (t (format "%S" val))))
 
 (defun org-babel-ocaml-parse-output (value type)
   "Parse VALUE of type TYPE.
-- 
2.35.1