ctags/man/ctags-lang-julia.7.html


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<div class="document" id="ctags-lang-julia">
<span id="ctags-lang-julia-7"></span>
<h1 class="title">ctags-lang-julia</h1>
<h2 class="subtitle" id="random-notes-about-tagging-julia-source-code-with-universal-ctags">Random notes about tagging Julia source code with Universal-ctags</h2>
<table class="docinfo" frame="void" rules="none">
<col class="docinfo-name" />
<col class="docinfo-content" />
<tbody valign="top">
<tr><th class="docinfo-name">Version:</th>
<td>5.9.0</td></tr>
<tr class="manual-group field"><th class="docinfo-name">Manual group:</th><td class="field-body">Universal-ctags</td>
</tr>
<tr class="manual-section field"><th class="docinfo-name">Manual section:</th><td class="field-body">7</td>
</tr>
</tbody>
</table>
<div class="section" id="synopsis">
<h1>SYNOPSIS</h1>
<div class="line-block">
<div class="line"><strong>ctags</strong> ... --languages=+Julia ...</div>
<div class="line"><strong>ctags</strong> ... --language-force=Julia ...</div>
<div class="line"><strong>ctags</strong> ... --map-Julia=+.jl ...</div>
</div>
</div>
<div class="section" id="description">
<h1>DESCRIPTION</h1>
<p>This man page gathers random notes about tagging Julia source code.</p>
</div>
<div class="section" id="tagging-import-and-using-expressions">
<h1>TAGGING <tt class="docutils literal">import</tt> AND <tt class="docutils literal">using</tt> EXPRESSIONS</h1>
<div class="section" id="summary">
<h2>Summary</h2>
<p><cite>using X</cite></p>
<blockquote>
<table border="1" class="docutils">
<colgroup>
<col width="7%" />
<col width="18%" />
<col width="33%" />
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<thead valign="bottom">
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<th class="head">kind</th>
<th class="head">role</th>
<th class="head">other noticeable fields</th>
</tr>
</thead>
<tbody valign="top">
<tr><td>X</td>
<td>module</td>
<td>used</td>
<td>N/A</td>
</tr>
</tbody>
</table>
</blockquote>
<p><cite>using X: a, b</cite></p>
<blockquote>
<table border="1" class="docutils">
<colgroup>
<col width="7%" />
<col width="18%" />
<col width="33%" />
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<td>unknown</td>
<td>used</td>
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</tr>
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</table>
</blockquote>
<p><cite>import X</cite></p>
<blockquote>
<table border="1" class="docutils">
<colgroup>
<col width="7%" />
<col width="18%" />
<col width="33%" />
<col width="42%" />
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<th class="head">kind</th>
<th class="head">role</th>
<th class="head">other noticeable fields</th>
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<tbody valign="top">
<tr><td>X</td>
<td>module</td>
<td>imported</td>
<td>N/A</td>
</tr>
</tbody>
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</blockquote>
<p><cite>import X.a, Y.b</cite></p>
<blockquote>
<table border="1" class="docutils">
<colgroup>
<col width="7%" />
<col width="18%" />
<col width="33%" />
<col width="42%" />
</colgroup>
<thead valign="bottom">
<tr><th class="head">name</th>
<th class="head">kind</th>
<th class="head">role</th>
<th class="head">other noticeable fields</th>
</tr>
</thead>
<tbody valign="top">
<tr><td>X, Y</td>
<td>module</td>
<td>namespace</td>
<td>N/A</td>
</tr>
<tr><td>a</td>
<td>unknown</td>
<td>imported</td>
<td>scope:module:X</td>
</tr>
<tr><td>b</td>
<td>unknown</td>
<td>imported</td>
<td>scope:module:Y</td>
</tr>
</tbody>
</table>
</blockquote>
<p><cite>import X: a, b</cite></p>
<blockquote>
<table border="1" class="docutils">
<colgroup>
<col width="7%" />
<col width="18%" />
<col width="33%" />
<col width="42%" />
</colgroup>
<thead valign="bottom">
<tr><th class="head">name</th>
<th class="head">kind</th>
<th class="head">role</th>
<th class="head">other noticeable fields</th>
</tr>
</thead>
<tbody valign="top">
<tr><td>X</td>
<td>module</td>
<td>namespace</td>
<td>N/A</td>
</tr>
<tr><td>a,b</td>
<td>unknown</td>
<td>imported</td>
<td>scope:module:X</td>
</tr>
</tbody>
</table>
</blockquote>
</div>
<div class="section" id="examples">
<h2>Examples</h2>
<p>&quot;input.jl&quot;</p>
<pre class="code Julia literal-block">
<span class="keyword">using</span> <span class="name">X0</span>
</pre>
<p>&quot;output.tags&quot;
with &quot;--options=NONE -o - --extras=+r --fields=+rzK input.jl&quot;</p>
<div class="system-message">
<p class="system-message-title">System Message: WARNING/2 (<tt class="docutils">ctags-lang-julia.7.rst</tt>, line 84)</p>
<p>Cannot analyze code. No Pygments lexer found for &quot;tags&quot;.</p>
<pre class="literal-block">
.. code-block:: tags

        X0      input.jl        /^using X0$/;&quot;  kind:module     roles:used

</pre>
</div>
<p><tt class="docutils literal"><span class="pre">--extras=+r</span></tt> (or <tt class="docutils literal"><span class="pre">--extras=+{reference}</span></tt>) option is needed for this tag,
since it's a reference tag. This is because module <tt class="docutils literal">X</tt> is not defined here.
It is defined in another file. Enable <tt class="docutils literal">roles:</tt> field with <tt class="docutils literal"><span class="pre">--fields=+r</span></tt> is
for recording that the module is &quot;used&quot;, i.e., loaded by <tt class="docutils literal">using</tt>.</p>
<p>&quot;input.jl&quot;</p>
<pre class="code Julia literal-block">
<span class="keyword">import</span> <span class="name">X1</span><span class="operator">.</span><span class="name">a</span><span class="punctuation">,</span> <span class="name">X2</span><span class="operator">.</span><span class="name">b</span><span class="punctuation">,</span> <span class="name">X3</span>
</pre>
<p>&quot;output.tags&quot;
with &quot;--options=NONE -o - --extras=+r --fields=+rzKZ input.jl&quot;</p>
<div class="system-message">
<p class="system-message-title">System Message: WARNING/2 (<tt class="docutils">ctags-lang-julia.7.rst</tt>, line 102)</p>
<p>Cannot analyze code. No Pygments lexer found for &quot;tags&quot;.</p>
<pre class="literal-block">
.. code-block:: tags

        X1      input.jl        /^import X1.a, X2.b, X3$/;&quot;     kind:module     roles:namespace
        X2      input.jl        /^import X1.a, X2.b, X3$/;&quot;     kind:module     roles:namespace
        X3      input.jl        /^import X1.a, X2.b, X3$/;&quot;     kind:module     roles:imported
        a       input.jl        /^import X1.a, X2.b, X3$/;&quot;     kind:unknown    scope:module:X1 roles:imported
        b       input.jl        /^import X1.a, X2.b, X3$/;&quot;     kind:unknown    scope:module:X2 roles:imported

</pre>
</div>
<p>Why <tt class="docutils literal">X1</tt> and <tt class="docutils literal">X2</tt> have role &quot;namespace&quot;, while <tt class="docutils literal">X3</tt> have role &quot;imported&quot;?
It's because the symbol <tt class="docutils literal">a</tt> in module <tt class="docutils literal">X1</tt>, and <tt class="docutils literal">b</tt> in module <tt class="docutils literal">X2</tt> are
brought to the current scope, but <tt class="docutils literal">X1</tt> and <tt class="docutils literal">X2</tt> themselves are not. We use
&quot;namespace&quot; role for such modules.</p>
<p><tt class="docutils literal">X3</tt> is different. The symbol <tt class="docutils literal">X3</tt>, together with all exported symbols in
<tt class="docutils literal">X3</tt>, is brought to current scope. For such modules, we use &quot;imported&quot; or
&quot;used&quot; role depending whether they are loaded by <tt class="docutils literal">import</tt> or <tt class="docutils literal">using</tt>.</p>
<p>Also, notice that <tt class="docutils literal">a</tt> and <tt class="docutils literal">b</tt> have the &quot;unknown&quot; kind. This is because we
cannot know whether it's a function, constant, or macro, etc.</p>
</div>
</div>
<div class="section" id="see-also">
<h1>SEE ALSO</h1>
<p>ctags(1), ctags-client-tools(7)</p>
</div>
</div>
</body>
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