40 lines
1.8 KiB
HTML
40 lines
1.8 KiB
HTML
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<h1 align="center">
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flex_string
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</h1>
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<p>This code accompanies the article
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"Type-Safe Formatting" in C/C++ Users Journal, July 2005.
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It implements a simple <tt>printf</tt> emulation framework,
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which is typesafe at the price of a slightly modified invocation syntax.</p>
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<p><tt>flex_string</tt> is a drop-in replacement for the standard string
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(<tt>std::basic_string</tt>, better known by its <tt>typedef</tt>ed name,
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<tt>std::string</tt>.
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If you think that reimplementing a likely fine-tuned component of your
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standard library is not a very rewarding endeavor, think again.
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<tt>flex_string</tt>
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has a policy-based design allowing unparalleled control over its
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behavior and optimizations, and also allows you to define new
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implementations in only a few dozens of lines of code. If you're
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looking for controllable performance and predictible behavior with
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multiple threads, then <tt>flex_string</tt> might be of interest to you.</p>
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<p>To find more about <tt>flex_string</tt>, you may want to read
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<a href="http://erdani.org/publications/cuj-06-2001.html" target="_top"><i>
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"A Policy-Based <code>basic_string</code> Implementation,"</i></a>
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C/C++ Users Journal, June 2001. </p>
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<p>The downloadable code consists of the <tt>flex_string</tt> header and
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a test suite that compares its behavior against <tt>std::string</tt>.
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Though no performance comparison suite is available at this time,
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Harmut Kaizer reported that simply dropping in <tt>flex_string</tt>
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in the Wave Boost Preprocessor improved its speed by 5-10%,
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depending on input.</p>
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<p>Justin Matthews contributed with
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<a href="http://erdani.org/code/flex_string_hash.h">flex_string_hash.h</a>,
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an add-on for <tt>flex_string</tt>
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that allows using it with hash maps. Justin's code supports (and
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automatically recognizes) two implementations: STLPort and Microsoft
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Visual C++ 7.1.</p>
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