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core/com.nokia.carbide.cpp.compiler.doc.user/html/c_compiler/c_macro_args.htm
author timkelly
Thu, 10 Dec 2009 13:45:47 -0600
branchRCL_2_4
changeset 671 80524b72f957
parent 0 fb279309251b
child 1641 2b3996fc09a1
permissions -rw-r--r--
Add S60 5.2 support.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN"><html>
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<title>A # Not Followed by a Macro Argument</title>
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<link rel="StyleSheet" href="../../book.css" type="text/css"/>
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<h3>A # Not Followed by a Macro Argument</h3>
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<p>(ISO C, &sect;6.10.3) The C compiler can accept <span class="code">#</span> tokens that do not appear before arguments in macro definitions.</p>
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<div class="listing">
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  <h5>Listing 1. Preprocessor Macros Using # Without an Argument</h5>
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  <p>#define add1(x) #x #1 // OK, but probably not what you wanted:<br />
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    // add1(abc) creates &quot;abc&quot;#1<br />
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    #define add2(x) #x &quot;2&quot; // OK: add2(abc) creates &quot;abc2&quot;</p>
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</div>
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<p>To use this feature, disable the <a href="../pragmas/p_ANSI_strict.htm">ANSI Strict</a> setting.</p>
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<p>See also &ldquo;Checking for Standard C and Standard C++ Conformity&rdquo;.<br />
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</p>
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<div id="footer">Copyright &copy; 2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. <br>License: <a href="http://www.eclipse.org/legal/epl-v10.html">http://www.eclipse.org/legal/epl-v10.html</a></div>
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FCL/sftools/dev/ide/carbidecpp