R: Find the parent (first) promise.

parent_promise {pryr} | R Documentation

## Find the parent (first) promise.

### Description

Find the parent (first) promise.

### Usage

    parent_promise(x)

### Arguments

`x` | unquoted name of promise to find initial value for for.

### Examples

    f <- function(x) g(x)
    g <- function(y) h(y)
    h <- function(z) parent_promise(z)

    h(x + 1)
    g(x + 1)
    f(x + 1)

[Package pryr version 0.1.4 Index]