formals_l: Formals lens

Description Usage Format Examples

Description

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.

Usage

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Format

An object of class lens of length 2.

Examples

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

g <- set(f, formals_l, list(x = 1, y = 2))
g()

lenses documentation built on May 2, 2019, 8:51 a.m.