EVOLUTION-MANAGER
Edit File: is_lang.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>R: Is an object a language object?</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" type="text/css" href="R.css" /> </head><body> <table width="100%" summary="page for is_lang {lazyeval}"><tr><td>is_lang {lazyeval}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Is an object a language object?</h2> <h3>Description</h3> <p>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). </p> <h3>Usage</h3> <pre> is_lang(x) is_name(x) is_call(x) is_pairlist(x) is_atomic(x) </pre> <h3>Arguments</h3> <table summary="R argblock"> <tr valign="top"><td><code>x</code></td> <td> <p>An object to test.</p> </td></tr> </table> <h3>See Also</h3> <p><code><a href="as_name.html">as_name</a>()</code> and <code><a href="as_name.html">as_call</a>()</code> for coercion functions. </p> <h3>Examples</h3> <pre> 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) </pre> <hr /><div style="text-align: center;">[Package <em>lazyeval</em> version 0.2.2 <a href="00Index.html">Index</a>]</div> </body></html>