lua

commit 3670db99b65f74d2671bfa9aa37ca7794c32332d
parent e14a02c24f22ff03bba4a0582f56d7af518339df
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date:   Mon,  6 Oct 2014 18:34:09 -0300

comments

Diffstat:
M
lstate.h
 | 
10
++++++++--

1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/lstate.h b/lstate.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lstate.h,v 2.114 2014/07/23 17:15:43 roberto Exp roberto $
+** $Id: lstate.h,v 2.115 2014/08/01 17:33:08 roberto Exp roberto $
 ** Global State
 ** See Copyright Notice in lua.h
 */
@@ -54,7 +54,13 @@ typedef struct stringtable {
 
 
 /*
-** information about a call
+** Information about a call.
+** When a thread yields, 'func' is adjusted to pretend that the
+** top function has only the yielded values in its stack; in that
+** case, the actual 'func' value is saved in field 'extra'. 
+** When a function calls another with a continuation, 'extra' keeps
+** the function index so that, in case of errors, the continuation
+** function can be called with the correct top.
 */
 typedef struct CallInfo {
   StkId func;  /* function index in the stack */