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84 lines
3.5 KiB
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<title>Conventions (The GNU C Preprocessor Internals)</title>
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Next: <a href="Lexer.html#Lexer" accesskey="n" rel="next">Lexer</a>, Previous: <a href="index.html#Top" accesskey="p" rel="prev">Top</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Conventions-1"></a>
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<h2 class="unnumbered">Conventions</h2>
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<a name="index-interface"></a>
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<a name="index-header-files"></a>
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<p>cpplib has two interfaces—one is exposed internally only, and the
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other is for both internal and external use.
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</p>
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<p>The convention is that functions and types that are exposed to multiple
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files internally are prefixed with ‘<samp>_cpp_</samp>’, and are to be found in
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the file <samp>internal.h</samp>. Functions and types exposed to external
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clients are in <samp>cpplib.h</samp>, and prefixed with ‘<samp>cpp_</samp>’. For
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historical reasons this is no longer quite true, but we should strive to
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stick to it.
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</p>
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<p>We are striving to reduce the information exposed in <samp>cpplib.h</samp> to the
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bare minimum necessary, and then to keep it there. This makes clear
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exactly what external clients are entitled to assume, and allows us to
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change internals in the future without worrying whether library clients
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are perhaps relying on some kind of undocumented implementation-specific
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behavior.
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