find_funs

fun_calls

fun_args

fun_body

This is a flexible function that matches function component against
a regular expression, returning the name of the function if there are any
matches. <code>fun_args</code> and <code>fun_calls</code> are helper functions that
make it possible to search for functions with specified argument names, or
which call certain functions.

Useful tools to pry back the covers of R and understand the
language at a deeper level.

Hadley Wickham

pryr

Tools for Computing on the Language

R Core team 

find_funs function

<dl><dt>env</dt>
<dd>environment in which to search for functions</dd>
<dt>extract</dt>
<dd>component of function to extract. Should be a function that
takes a function as input as returns a character vector as output,
like <code>fun_calls</code> or <code>fun_args</code>.</dd>
<dt>pattern</dt>
<dd>stringr regular expression to results of <code>extract</code>
function.</dd>
<dt>...</dt>
<dd>other arguments passed on to <code><a href="/link/grepl?package=pryr&version=0.1.6" data-mini-rdoc="pryr::grepl">grepl</a></code></dd>
<dt>f</dt>
<dd>function to extract information from</dd></dl>

Arguments

Find functions matching criteria. — find_funs

<dl>

<dt>env</dt>
<dd>environment in which to search for functions</dd>


<dt>extract</dt>
<dd>component of function to extract. Should be a function that
takes a function as input as returns a character vector as output,
like <code>fun_calls</code> or <code>fun_args</code>.</dd>


<dt>pattern</dt>
<dd>stringr regular expression to results of <code>extract</code>
function.</dd>


<dt>...</dt>
<dd>other arguments passed on to <code><a href='https://rdrr.io/r/base/grep.html'>grepl</a></code></dd>


<dt>f</dt>
<dd>function to extract information from</dd>

</dl>

find_funs: Find functions matching criteria.

Description

Usage

Arguments

Examples