uneval: Capture the call associated with a promise.

Description Usage Arguments See Also Examples

View source: R/uneval.r

Description

This is an alternative to subsitute that performs one job, and so gives a stronger signal regarding the intention of your code. It returns an error if the name is not associated with a promise.

Usage

1
uneval(x)

Arguments

x

unquoted variable name that refers to a promise. An error will be thrown if it's not a promise.

See Also

Other promise tools: is_promise

Examples

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f <- function(x) {
   uneval(x)
}
f(a + b)
f(1 + 4)

delayedAssign("x", 1 + 4)
uneval(x)
x
uneval(x)

pryr documentation built on Feb. 18, 2018, 9:02 a.m.