Formals lens

A lens equivalent of formals and formals<-, allowing you to change the formal arguments of a function. As with body_l you probably shouldn't use this.

formals_l

Format

An object of class lens of length 2.

Examples

f <- function(x) x + y + 7
view(f, formals_l)
#> $x
#> 
#> 

g <- set(f, formals_l, list(x = 1, y = 2))
g()
#> [1] 10