1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/language.R
\name{is_lang}
\alias{is_lang}
\alias{is_name}
\alias{is_call}
\alias{is_pairlist}
\alias{is_atomic}
\title{Is an object a language object?}
\usage{
is_lang(x)
is_name(x)
is_call(x)
is_pairlist(x)
is_atomic(x)
}
\arguments{
\item{x}{An object to test.}
}
\description{
These helpers are consistent wrappers around their base R equivalents.
A language object is either an atomic vector (typically a scalar), a
name (aka a symbol), a call, or a pairlist (used for function arguments).
}
\examples{
q1 <- quote(1)
is_lang(q1)
is_atomic(q1)
q2 <- quote(x)
is_lang(q2)
is_name(q2)
q3 <- quote(x + 1)
is_lang(q3)
is_call(q3)
}
\seealso{
\code{\link{as_name}()} and \code{\link{as_call}()} for coercion
functions.
}
|
