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+<div class="section-level-extent" id="Subscripting"> <div class="nav-panel"> <p> Next: <a href="pointer-arith" accesskey="n" rel="next">Arithmetic on <code class="code">void</code>- and Function-Pointers</a>, Previous: <a href="escaped-newlines" accesskey="p" rel="prev">Slightly Looser Rules for Escaped Newlines</a>, Up: <a href="c-extensions" accesskey="u" rel="up">Extensions to the C Language Family</a> [<a href="index#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="indices" title="Index" rel="index">Index</a>]</p> </div>  <h1 class="section" id="Non-Lvalue-Arrays-May-Have-Subscripts"><span>6.23 Non-Lvalue Arrays May Have Subscripts<a class="copiable-link" href="#Non-Lvalue-Arrays-May-Have-Subscripts"> ¶</a></span></h1>    <p>In ISO C99, arrays that are not lvalues still decay to pointers, and may be subscripted, although they may not be modified or used after the next sequence point and the unary ‘<samp class="samp">&amp;</samp>’ operator may not be applied to them. As an extension, GNU C allows such arrays to be subscripted in C90 mode, though otherwise they do not decay to pointers outside C99 mode. For example, this is valid in GNU C though not valid in C90: </p> <div class="example smallexample"> <div class="group"><pre class="example-preformatted" data-language="cpp">struct foo {int a[4];};
+
+struct foo f();
+
+bar (int index)
+{
+  return f().a[index];
+}</pre></div>
+</div> </div><div class="_attribution">
+  <p class="_attribution-p">
+    &copy; Free Software Foundation<br>Licensed under the GNU Free Documentation License, Version 1.3.<br>
+    <a href="https://gcc.gnu.org/onlinedocs/gcc-13.1.0/gcc/Subscripting.html" class="_attribution-link">https://gcc.gnu.org/onlinedocs/gcc-13.1.0/gcc/Subscripting.html</a>
+  </p>
+</div>