From 485054ab819d9b1607baa671836d48f6ea84969f Mon Sep 17 00:00:00 2001
From: Jim Fehrle
Date: Thu, 16 Apr 2020 19:09:31 -0700
Subject: Add MOVEALLBUT operation

---
 doc/tools/docgram/README.md      |  5 +++++
 doc/tools/docgram/doc_grammar.ml | 31 ++++++++++++++++++++++---------
 2 files changed, 27 insertions(+), 9 deletions(-)

(limited to 'doc')

diff --git a/doc/tools/docgram/README.md b/doc/tools/docgram/README.md
index 4cde3809f0..2d29743d78 100644
--- a/doc/tools/docgram/README.md
+++ b/doc/tools/docgram/README.md
@@ -200,6 +200,11 @@ that appear in the specified production:
 `MOVETO <destination> <production>` - moves the production to `<destination>` and,
  if needed, creates a new production <edited_nt> -> \<destination>.
 
+
+`MOVEALLBUT <destination>` - moves all the productions in the nonterminal to `<destination>`
+*except* for the productions following the `MOVEALLBUT` production in the edit script
+(terminated only by the closing `]`).
+
 `OPTINREF` - verifies that <edited_nt> has an empty production.  If so, it removes
 the empty production and replaces all references to <edited_nt> throughout the
 grammar with `OPT <edited_nt>`
diff --git a/doc/tools/docgram/doc_grammar.ml b/doc/tools/docgram/doc_grammar.ml
index 82be844888..cb2b0234a9 100644
--- a/doc/tools/docgram/doc_grammar.ml
+++ b/doc/tools/docgram/doc_grammar.ml
@@ -1163,6 +1163,10 @@ let report_undef_nts g prod rec_nt =
     nts
 
 let apply_edit_file g edits =
+  let moveto src_nt dest_nt oprod prods =
+    g_add_prod_after g (Some src_nt) dest_nt oprod;
+    remove_prod oprod prods src_nt      (* remove orig prod *)
+  in
   List.iter (fun b ->
       let (nt, eprod) = b in
       if not (edit_all_prods g nt eprod) then begin
@@ -1176,17 +1180,26 @@ let apply_edit_file g edits =
               error "DELETENT for undefined nonterminal `%s`\n" nt;
             g_remove g nt;
             aux tl prods false
-          | (Snterm "MOVETO" :: Snterm nt2 :: oprod) :: tl ->
-            g_add_prod_after g (Some nt) nt2 oprod;
-            let prods' = (try
+          | (Snterm "MOVETO" :: Snterm dest_nt :: oprod) :: tl ->
+            let prods = try (* add "nt -> dest_nt" production *)
               let posn = find_first oprod prods nt in
-              let prods = if List.mem [Snterm nt2] prods then prods
-                else insert_after posn [[Snterm nt2]] prods (* insert new prod *)
-              in
-              remove_prod oprod prods nt      (* remove orig prod *)
-              with Not_found -> prods)
-            in
+              if List.mem [Snterm dest_nt] prods then prods
+                else insert_after posn [[Snterm dest_nt]] prods (* insert new prod *)
+            with Not_found -> prods in
+            let prods' = moveto nt dest_nt oprod prods in
             aux tl prods' add_nt
+          | [Snterm "MOVEALLBUT"; Snterm dest_nt] :: tl ->
+            List.iter (fun tlprod ->
+                if not (List.mem tlprod prods) then
+                  error "MOVEALLBUT for %s can't find '%s'\n" nt (prod_to_str tlprod))
+              tl;
+            let prods' = List.fold_left (fun prods oprod ->
+                if not (List.mem oprod tl) then begin
+                  moveto nt dest_nt oprod prods
+                end else
+                  prods)
+              prods prods in
+            prods', add_nt
           | (Snterm "OPTINREF" :: _) :: tl ->
             if not (has_match [] prods) then
               error "OPTINREF but no empty production for %s\n" nt;
-- 
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