Retrieving raw nginx location string

[Gavin Woods]

Is it possible to get the raw location string in a block?

location ~ "/test/(.+)/world" {
             access_by_lua_block {
                ngx.say(ngx.var.uri)
            }
        }

I basically want to store: /test/(.+)/world as a var with the regex string pattern

ngx.var.uri will log something like /test/1/world which isn't useful for traceability.