Add this to the beginning of every verbal expression chain. This simply returns an empty character vector so that the next step in the chain can provide a value without explicitly writing value = "blah".

rx()

## Examples

rx()#> character(0)
# this
rx() %>%
rx_find("cat") %>%
rx_anything() %>%
rx_find("dog")#> [1] "(cat)(.*)(dog)"
rx_find("dog")#> [1] "(cat)(.*)(dog)"