plus_number.diff

Index: WISHLIST.txt
===================================================================
--- WISHLIST.txt	(revision 7335)
+++ WISHLIST.txt	(revision 7336)
@@ -266,7 +266,10 @@
 -  transfer Lua_Extended.txt document to the website
    (part of modding guide).
 
+?  implement 2D array access: [x, y] --> [x][y]
+   --> there's a power patch for that
 
+
 ----------------------------------------------------------------
   DOOM and DOOM II
 ----------------------------------------------------------------
Index: CHANGES.txt
===================================================================
--- CHANGES.txt	(revision 7335)
+++ CHANGES.txt	(revision 7336)
@@ -47,6 +47,7 @@
   - ternary operator of the form: (X ? Y ; Z)
   - continue statement
   - alternative inequality operator: !=
+  - allow numbers to begin with plus, like: +3
 
 - incorporated glBSP source for easier building
 
Index: lua_src/llex.cc
===================================================================
--- lua_src/llex.cc	(revision 7335)
+++ lua_src/llex.cc	(revision 7336)
@@ -25,7 +25,8 @@
 
 
 
-#define next(ls) (ls->current = zgetc(ls->z))
+/* -AJA- 2011/06/14: remember the last character */
+#define next(ls) (ls->previous = ls->current, ls->current = zgetc(ls->z))
 
 
 
@@ -145,6 +146,7 @@
   ls->lastline = 1;
   ls->source = source;
   luaZ_resizebuffer(ls->L, ls->buff, LUA_MINBUFFER);  /* initialize buffer */
+  ls->current = 0;  /* --AJA-- */
   next(ls);  /* read first char */
 }
 
@@ -357,6 +359,22 @@
           next(ls);
         continue;
       }
+      /* -AJA- 2011/06/14: hacky support for numbers like +3 */
+      case '+': {
+        if (! (ls->previous == 0   || isspace(ls->previous) ||
+               ls->previous == ',' || ls->previous == '(' ||
+               ls->previous == '[' || ls->previous == '{'))
+        {
+          next(ls); return '+';
+        }
+        next(ls);
+        if (isdigit(ls->current))
+        {
+          read_numeral(ls, seminfo);
+          return TK_NUMBER;
+        }
+        return '+';
+      }
       case '[': {
         int sep = skip_sep(ls);
         if (sep >= 0) {
Index: lua_src/llex.h
===================================================================
--- lua_src/llex.h	(revision 7335)
+++ lua_src/llex.h	(revision 7336)
@@ -54,6 +54,7 @@
 
 typedef struct LexState {
   int current;  /* current character (charint) */
+  int previous; /* previous character --AJA-- */
   int linenumber;  /* input line counter */
   int lastline;  /* line of last token `consumed' */
   Token t;  /* current token */
Index: doc/Lua_Extended.txt
===================================================================
--- doc/Lua_Extended.txt	(revision 7335)
+++ doc/Lua_Extended.txt	(revision 7336)
@@ -73,3 +73,7 @@
    since I find it more readable -- the exclamation mark just
    stands out more.
 
+
+6. Allow numbers to begin with a plus sign, example: +3
+   Just another little thing I missed from C.
+