*** parse.y.1.9.3-p0    2011-11-05 12:38:44.000000000 +0900
--- parse.y     2011-11-05 11:57:59.000000000 +0900
*************** top_stmt        : stmt
*** 877,911 ****
                    }
                ;
  
! bodystmt      : compstmt
                  opt_rescue
                  opt_else
                  opt_ensure
                    {
                    /*%%%*/
!                       $$ = $1;
!                       if ($2) {
!                           $$ = NEW_RESCUE($1, $2, $3);
                        }
!                       else if ($3) {
                            rb_warn0("else without rescue is useless");
!                           $$ = block_append($$, $3);
                        }
!                       if ($4) {
                            if ($$) {
!                               $$ = NEW_ENSURE($$, $4);
                            }
                            else {
!                               $$ = block_append($4, NEW_NIL());
                            }
                        }
!                       fixpos($$, $1);
                    /*%
                        $$ = dispatch4(bodystmt,
-                                      escape_Qundef($1),
                                       escape_Qundef($2),
                                       escape_Qundef($3),
!                                      escape_Qundef($4));
                    %*/
                    }
                ;
--- 877,912 ----
                    }
                ;

! bodystmt      : opt_type
!                 compstmt
                  opt_rescue
                  opt_else
                  opt_ensure
                    {
                    /*%%%*/
!                       $$ = $2;
!                       if ($3) {
!                           $$ = NEW_RESCUE($2, $3, $4);
                        }
!                       else if ($4) {
                            rb_warn0("else without rescue is useless");
!                           $$ = block_append($$, $4);
                        }
!                       if ($5) {
                            if ($$) {
!                               $$ = NEW_ENSURE($$, $5);
                            }
                            else {
!                               $$ = block_append($5, NEW_NIL());
                            }
                        }
!                       fixpos($$, $2);
                    /*%
                        $$ = dispatch4(bodystmt,
                                       escape_Qundef($2),
                                       escape_Qundef($3),
!                                      escape_Qundef($4),
!                                      escape_Qundef($5));
                    %*/
                    }
                ;
*************** stmt            : keyword_alias fitem {lex_state =
*** 989,994 ****
--- 990,1004 ----
                        $$ = dispatch1(alias_error, $$);
                    %*/
                    }
+               | lhs ':' cpath '=' arg
+                   {
+                   /*%%%*/
+                       value_expr($5);
+                       $$ = node_assign($1, $5);
+                   /*%
+                       $$ = dispatch2(assign, $1, $5);
+                   %*/
+                   }
                | keyword_undef undef_list
                    {
                    /*%%%*/
*************** cases           : opt_else
*** 3768,3773 ****
--- 3778,3787 ----
                | case_body
                ;

+ opt_type      : ':' cpath
+               | none
+               ;
+ 
  opt_rescue    : keyword_rescue exc_list exc_var then
                  compstmt
                  opt_rescue
*************** f_norm_arg      : f_bad_arg
*** 4546,4551 ****
--- 4560,4566 ----
                ;

  f_arg_item    : f_norm_arg
+                 opt_type
                    {  
                        arg_var(get_id($1));
                    /*%%%*/