Allow maps to use SHUFFLE: directive to shuffle symbols in the map definition

(David).

For instance, SHUFFLE: def will shuffle its argument (to "efd", for instance)
and replace each occurrence of the symbols in its argument with the
corresponding symbol in the shuffled list (so all d will be replaced with e,
all e with f, and all f with d in the example).

Multiple SHUFFLE: lines can be used, and each shuffle will be applied
independently.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@906 c06c8d41-db1a-0410-9941-cceddc491573

1 files changed, 8 insertions, 1 deletions

diff --git a/crawl-ref/source/util/levcomp.ypp b/crawl-ref/source/util/levcomp.ypp
index d223161b02..41848978f8 100644
--- a/crawl-ref/source/util/levcomp.ypp
+++ b/crawl-ref/source/util/levcomp.ypp
@@ -25,7 +25,7 @@ void yyerror(const char *e)
 }
 
 %token <i>      BRANCHDEF BRANCH DESC DEFAULT
-%token <i>      DEFAULT_DEPTH SYMBOL TAGS
+%token <i>      DEFAULT_DEPTH SYMBOL TAGS SHUFFLE
 %token <i>      NAME DEPTH ORIENT PLACE CHANCE FLAGS MONS ITEM
 %token <i>      ROOT_DEPTH ENTRY_MSG EXIT_MSG
 %token <i>      ROCK_COLOUR FLOOR_COLOUR
@@ -130,8 +130,15 @@ metaline        : place
                 | items
                 | symbol
                 | tags
+                | shuffle
                 ;
 
+shuffle         : SHUFFLE { }
+                | SHUFFLE STRING
+                {
+                    lc_map.add_shuffle($2);
+                }
+
 tags            : TAGS tagstrings {}
                 ;