| line | true | false | branch | 
 
| 22 | 0 | 1 | unless @_ and defined wantarray | 
 
|  | 0 | 1 | unless @_ > 1 | 
 
|  | 0 | 0 | if $key < $max_key | 
 
|  | 0 | 0 | if $key > $max_key | 
 
|  | 2 | 0 | if $key < $max_key | 
 
|  | 0 | 0 | if $key > $max_key | 
 
|  | 0 | 1 | if (wantarray) { } | 
 
|  | 3 | 6 | unless @_ and defined wantarray | 
 
|  | 2 | 4 | unless @_ > 1 | 
 
|  | 4 | 2 | if $key gt $max_key | 
 
|  | 0 | 2 | if $key lt $max_key | 
 
|  | 3 | 2 | if $key gt $max_key | 
 
|  | 2 | 0 | if $key lt $max_key | 
 
|  | 2 | 2 | if (wantarray) { } | 
 
|  | 0 | 1 | unless @_ and defined wantarray | 
 
|  | 0 | 1 | unless @_ > 1 | 
 
|  | 0 | 0 | if $key > $max_key | 
 
|  | 0 | 0 | if $key < $max_key | 
 
|  | 1 | 1 | if $key > $max_key | 
 
|  | 1 | 0 | if $key < $max_key | 
 
|  | 0 | 1 | if (wantarray) { } | 
 
|  | 0 | 1 | unless @_ and defined wantarray | 
 
|  | 0 | 1 | unless @_ > 1 | 
 
|  | 0 | 0 | if $key lt $max_key | 
 
|  | 0 | 0 | if $key gt $max_key | 
 
|  | 1 | 1 | if $key lt $max_key | 
 
|  | 1 | 0 | if $key gt $max_key | 
 
|  | 0 | 1 | if (wantarray) { } | 
 
| 67 | 1 | 3 | unless @_ | 
 
| 68 | 0 | 3 | unless (defined wantarray) | 
 
| 72 | 1 | 2 | if (@_ == 1) | 
 
| 73 | 1 | 0 | wantarray ? : | 
 
| 84 | 1 | 2 | unless @_ | 
 
| 85 | 0 | 2 | unless (defined wantarray) | 
 
| 91 | 1 | 1 | wantarray ? : |