arg_env

arg_expr

name

The environment to look for the argument name in. By default
looks in the lexical environment of the <code>name</code> argument.

envir


<code>arg_env</code> determines the lexical scope of an argument (which must be an
un-evaluated promise).<p></p><p><code>arg_expr</code> fetches the expression attached to an argument in the given
environment. The effect is similar to <code>substitute(name)</code> but more
specific.
</p>

This package implements workalikes for the author's (and
perhaps your) favorite features from other languages, making R
programs shorter and more expressive. Destructurimg bind lets you
perform parallel assignments and unpack nested lists. A chain
macro lets you quickly string several operations together, similar
to Unix pipelines. A collection of functions makes it easy to work
with `...` arguments and missing values. Behind the scenes is an
efficient macro utility, with a much improved alternative to the
bquote() function.

Peter Meilstrup

vadr

Macros, metaprogramming, and pleasant programming idioms.

arg_env function


<code>arg_env</code> determines the lexical scope of an argument (which must be an
un-evaluated promise).

<code>arg_expr</code> fetches the expression attached to an argument in the given
environment. The effect is similar to <code>substitute(name)</code> but more
specific.


arg_env: Get environment or expression from a named argument.

Description

Usage

Arguments