Argument and function name the same

[hadley]

library(rlang)

f <- function(mean = mean(10)) {
  mean
}
f()
#> Error in f(): promise already under evaluation: recursive default argument reference or earlier problems?


f <- function(mean = NULL) {
  mean %||% mean(10)
}
f()
#> [1] 10

^{Created on 2023-10-05 with reprex v2.0.2}

Maybe in one of the defaults chapters?