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return

Available inall subroutines.

Terminates a subroutine and sets the return state.

return(lookup);

The return states available vary by subroutine. return can also be used to terminate custom subroutines and pass control back to the parent if used without a parameter. For example, the following code will set the header custom_header to "Hello big world":

sub my_custom_sub {
  set req.http.custom_header += "big ";
  return;
  set req.http.custom_header += "wide "; # Does not run
}


sub vcl_recv {
  set req.http.custom_header = "Hello ";
  call my_custom_sub;
  set req.http.custom_header = "world."; # Runs because the `return` statement in my_custom_sub did not specify a return state
}
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