1 files changed, 49 insertions, 2 deletions

diff --git a/scripts/genksyms/lex.lex.c_shipped b/scripts/genksyms/lex.lex.c_shipped
index 0bf4157e6161..f82740a69b85 100644
--- a/scripts/genksyms/lex.lex.c_shipped
+++ b/scripts/genksyms/lex.lex.c_shipped
@@ -1938,8 +1938,9 @@ int
 yylex(void)
 {
   static enum {
-    ST_NOTSTARTED, ST_NORMAL, ST_ATTRIBUTE, ST_ASM, ST_BRACKET, ST_BRACE,
-    ST_EXPRESSION, ST_TABLE_1, ST_TABLE_2, ST_TABLE_3, ST_TABLE_4,
+    ST_NOTSTARTED, ST_NORMAL, ST_ATTRIBUTE, ST_ASM, ST_TYPEOF, ST_TYPEOF_1,
+    ST_BRACKET, ST_BRACE, ST_EXPRESSION,
+    ST_TABLE_1, ST_TABLE_2, ST_TABLE_3, ST_TABLE_4,
     ST_TABLE_5, ST_TABLE_6
   } lexstate = ST_NOTSTARTED;
 
@@ -2007,6 +2008,10 @@ repeat:
                     lexstate = ST_ASM;
                     count = 0;
                     goto repeat;
+                  case TYPEOF_KEYW:
+                    lexstate = ST_TYPEOF;
+                    count = 0;
+                    goto repeat;
 
                   case STRUCT_KEYW:
                   case UNION_KEYW:
@@ -2093,6 +2098,48 @@ repeat:
         }
       break;
 
+    case ST_TYPEOF:
+      switch (token)
+        {
+        case '(':
+          if ( ++count == 1 )
+            lexstate = ST_TYPEOF_1;
+          else
+            APP;
+          goto repeat;
+        case ')':
+          APP;
+          if (--count == 0)
+            {
+              lexstate = ST_NORMAL;
+              token = TYPEOF_PHRASE;
+              break;
+            }
+          goto repeat;
+        default:
+          APP;
+          goto repeat;
+        }
+      break;
+
+    case ST_TYPEOF_1:
+      if (token == IDENT)
+        {
+          if (is_reserved_word(yytext, yyleng)
+              || find_symbol(yytext, SYM_TYPEDEF, 1))
+            {
+              yyless(0);
+              unput('(');
+              lexstate = ST_NORMAL;
+              token = TYPEOF_KEYW;
+              break;
+            }
+          _APP("(", 1);
+        }
+        APP;
+        lexstate = ST_TYPEOF;
+        goto repeat;
+
     case ST_BRACKET:
       APP;
       switch (token)