Refactor 'pop' and 'top' so that empty queue triggers an error
tree6929c9aec7457e62813e4eb72b985e30b3361beb
-rw-r--r-- 376 DESCRIPTION
-rw-r--r-- 1141 NAMESPACE
drwxr-xr-x - R
drwxr-xr-x - inst
drwxr-xr-x - man
drwxr-xr-x - src
drwxr-xr-x - tests