is_lang

is_unary_lang

is_binary_lang

quo_is_lang

An object to test. If a formula, the right-hand side is
extracted.

An optional name that the call should match. It is
passed to <code><a rd-options="=sym" href="/link/sym()?package=rlang&version=0.2.1&to=%3Dsym" data-mini-rdoc="=sym::sym()">sym()</a></code> before matching. This argument is vectorised
and you can supply a vector of names to match. In this case,
<code>is_call()</code> returns <code>TRUE</code> if at least one name matches.

name

An optional number of arguments that the call should
match.

The namespace of the call. If <code>NULL</code>, the namespace
doesn't participate in the pattern-matching. If an empty string
<code>""</code> and <code>x</code> is a namespaced call, <code>is_call()</code> returns
<code>FALSE</code>. If any other string, <code>is_call()</code> checks that <code>x</code> is
namespaced within <code>ns</code>.

These functions are soft-deprecated, please use <code><a rd-options="=is_call" href="/link/is_call()?package=rlang&version=0.2.1&to=%3Dis_call" data-mini-rdoc="=is_call::is_call()">is_call()</a></code> and its
<code>n</code> argument instead.

internal

A toolbox for working with base types, core R features
like the condition system, and core 'Tidyverse' features like tidy
evaluation.

Lionel Henry

rlang

Functions for Base Types and Core R and 'Tidyverse' Features

Hadley Wickham

RStudio 

is_lang function

An optional name that the call should match. It is
passed to <code><a rd-options='=sym' href='sym()'>sym()</a></code> before matching. This argument is vectorised
and you can supply a vector of names to match. In this case,
<code>is_call()</code> returns <code>TRUE</code> if at least one name matches.

These functions are soft-deprecated, please use <code><a rd-options='=is_call' href='is_call()'>is_call()</a></code> and its
<code>n</code> argument instead.

is_lang: Is object a call?

Description

Usage

Arguments