Re: patch: C-style string lexing

["Patrick Donnelly" <batrick.donnelly@...>]

I've attached a very small patch that let's you do something very
similar to this but syntactically different from C. It allows you to
do the following:

a = "a piece of a string
       "another piece
       "the end";
print(a) --> a piece of a string another piece the end

Basically, once it reaches a new line (instead of erroring like
default lua), it instead looks for a string delimiter ignoring white
space, and then continues lexing the string. It's completely backwards
compatible with core Lua now as far as I can tell.

-- 
-Patrick Donnelly

"One of the lessons of history is that nothing is often a good thing
to do and always a clever thing to say."

-Will Durant

--- llex.c	2008-01-31 15:58:44.000000000 -0700
+++ llex.new.c	2008-01-31 13:38:31.000000000 -0700
@@ -282,7 +282,19 @@
         continue;  /* to avoid warnings */
       case '\n':
       case '\r':
-        luaX_lexerror(ls, "unfinished string", TK_STRING);
+        next(ls);
+        while (ls->current != del) {
+          switch (ls->current) {
+            case '\t': /* only allow whitespace */
+            case ' ':
+              break;
+            default: 
+              luaX_lexerror(ls, "unfinished string", TK_STRING);
+              continue; /* to avoid warnings */
+          }
+          next(ls);
+        }
+        next(ls);
         continue;  /* to avoid warnings */
       case '\\': {
         int c;