lua

commit 508a705c1c08d883473199d6ba019d186c28b9df
parent 6f1c033d72af8fe65bb67e17a242314b6aeb182f
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date:   Thu, 28 Nov 2019 18:09:59 -0300

Removed some wrong comments

Both 'tonumber' and 'tointeger' cannot change the out parameter when
the conversion fails.

Diffstat:
M
lapi.c
 | 
14
++++++--------

1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/lapi.c b/lapi.c
@@ -350,23 +350,21 @@ LUA_API size_t lua_stringtonumber (lua_State *L, const char *s) {
 
 
 LUA_API lua_Number lua_tonumberx (lua_State *L, int idx, int *pisnum) {
-  lua_Number n;
+  lua_Number n = 0;
   const TValue *o = index2value(L, idx);
   int isnum = tonumber(o, &n);
-  if (!isnum)
-    n = 0;  /* call to 'tonumber' may change 'n' even if it fails */
-  if (pisnum) *pisnum = isnum;
+  if (pisnum)
+    *pisnum = isnum;
   return n;
 }
 
 
 LUA_API lua_Integer lua_tointegerx (lua_State *L, int idx, int *pisnum) {
-  lua_Integer res;
+  lua_Integer res = 0;
   const TValue *o = index2value(L, idx);
   int isnum = tointeger(o, &res);
-  if (!isnum)
-    res = 0;  /* call to 'tointeger' may change 'n' even if it fails */
-  if (pisnum) *pisnum = isnum;
+  if (pisnum)
+    *pisnum = isnum;
   return res;
 }