fn_body() is a simple wrapper around base::body(). It always returns a { expression and throws an error when the input is a primitive function (whereas body() returns NULL). The setter version preserves attributes, unlike body<-.

fn_body(fn = caller_fn())

fn_body(fn) <- value

Arguments

fn

A function. It is lookep up in the calling frame if not supplied.

value

New formals or formals names for fn.

Examples

# fn_body() is like body() but always returns a block: fn <- function() do() body(fn)
#> do()
fn_body(fn)
#> { #> do() #> }
# It also throws an error when used on a primitive function: try(fn_body(base::list))