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<p>
Previous: <a href="History.html#History" accesskey="p" rel="prev">History</a>, Up: <a href="Intro.html#Intro" accesskey="u" rel="up">Intro</a> [<a href="Parameter-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="Features-of-FWEB"></a>
<h3 class="section">1.2 Features of <small>FWEB</small></h3>
<p><small>FWEB</small> is distinguished from its relatives in several respects:
</p>
<blockquote>
<ul>
<li> <small>FWEB</small> introduces the concept of a <em>current language</em>
(see <a href="Languages.html#Languages">Languages</a>), so more than one compiler language can be processed
in a single <small>FWEB</small> run. For example, mixtures of C++ and
<small>FORTRAN</small> are common in modern scientific programming.
</li><li> <small>FWEB</small> understands the syntaxes of several of the more important
compiler languages: C, C++, <small>FORTRAN</small> (both F77 and F90),
<small>RATFOR</small>, and TeX. For other languages, <small>FWEB</small> can work in a
language-independent mode that essentially weaves and tangles the source
code verbatim, but still provides the user with the powerful <small>WEB</small>
features related to <small>TEX</small> documentation, module names, macro
processing, etc.
</li><li> <small>FWEB</small> contains a built-in <small>RATFOR</small> (<small>RATIONAL</small> <small>FORTRAN</small>)
translator. See <a href="Ratfor.html#Ratfor">Ratfor</a>.
</li><li> <small>FWEB</small> has a built-in C-like <em>macro preprocessor</em>. This is
especially useful for <small>FORTRAN</small> and <small>RATFOR</small>, which have no predefined
preprocessor. However, certain extensions such as variable numbers of arguments
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See <a href="Macros.html#Macros">Macros</a> and <a href="Preprocessing.html#Preprocessing">Preprocessing</a>.
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