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<title>Welcome to Tshunhue Documents’s documentation! &mdash; Tshunhue Documents documentation</title>
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<h1>Welcome to Tshunhue Documents’s documentation!<a class="headerlink" href="#welcome-to-tshunhue-documents-s-documentation" title="Permalink to this headline"></a></h1>
<div class="toctree-wrapper compound">
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<ul>
<li class="toctree-l1"><a class="reference internal" href="%E5%9F%BA%E6%9C%AC%E5%87%BD%E6%95%B8%E4%BB%8B%E7%B4%B9.html">基本函數介紹</a><ul>
<li class="toctree-l2"><a class="reference internal" href="%E5%9F%BA%E6%9C%AC%E5%87%BD%E6%95%B8%E4%BB%8B%E7%B4%B9.html#id2">四則運算</a></li>
<li class="toctree-l2"><a class="reference internal" href="%E5%9F%BA%E6%9C%AC%E5%87%BD%E6%95%B8%E4%BB%8B%E7%B4%B9.html#id3">布爾值</a></li>
<li class="toctree-l2"><a class="reference internal" href="%E5%9F%BA%E6%9C%AC%E5%87%BD%E6%95%B8%E4%BB%8B%E7%B4%B9.html#id4">流程控制</a></li>
<li class="toctree-l2"><a class="reference internal" href="%E5%9F%BA%E6%9C%AC%E5%87%BD%E6%95%B8%E4%BB%8B%E7%B4%B9.html#id5">影印字元</a></li>
<li class="toctree-l2"><a class="reference internal" href="%E5%9F%BA%E6%9C%AC%E5%87%BD%E6%95%B8%E4%BB%8B%E7%B4%B9.html#id6">定義變數 (=)</a><ul>
<li class="toctree-l3"><a class="reference internal" href="%E5%9F%BA%E6%9C%AC%E5%87%BD%E6%95%B8%E4%BB%8B%E7%B4%B9.html#id7">非函數</a></li>
<li class="toctree-l3"><a class="reference internal" href="%E5%9F%BA%E6%9C%AC%E5%87%BD%E6%95%B8%E4%BB%8B%E7%B4%B9.html#id8">函數（閉包）</a></li>
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<li class="toctree-l2"><a class="reference internal" href="%E5%9F%BA%E6%9C%AC%E5%87%BD%E6%95%B8%E4%BB%8B%E7%B4%B9.html#lambda-function">匿名函數 (lambda function)</a></li>
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<li class="toctree-l1"><a class="reference internal" href="%E5%9E%8B%E5%88%A5.html">型別</a><ul>
<li class="toctree-l2"><a class="reference internal" href="%E5%9E%8B%E5%88%A5.html#id2">簡單型別</a><ul>
<li class="toctree-l3"><a class="reference internal" href="%E5%9E%8B%E5%88%A5.html#id3">數字</a></li>
<li class="toctree-l3"><a class="reference internal" href="%E5%9E%8B%E5%88%A5.html#id4">字串</a></li>
<li class="toctree-l3"><a class="reference internal" href="%E5%9E%8B%E5%88%A5.html#id5">布林</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="%E5%9E%8B%E5%88%A5.html#id6">複雜型別</a><ul>
<li class="toctree-l3"><a class="reference internal" href="%E5%9E%8B%E5%88%A5.html#id7">自訂型別</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
</div>
<div class="section" id="indices-and-tables">
<h1>Indices and tables<a class="headerlink" href="#indices-and-tables" title="Permalink to this headline"></a></h1>
<ul class="simple">
<li><p><a class="reference internal" href="genindex.html"><span class="std std-ref">Index</span></a></p></li>
<li><p><a class="reference internal" href="py-modindex.html"><span class="std std-ref">Module Index</span></a></p></li>
<li><p><a class="reference internal" href="search.html"><span class="std std-ref">Search Page</span></a></p></li>
</ul>
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<div class="section" id="tshunhue">
<h1>Tshunhue 是什麼呢？<a class="headerlink" href="#tshunhue" title="Permalink to this headline"></a></h1>
<p>Tshunhue（河洛語：春花）是一個 Lisp 系的玩具程式語言。主要的特徵有：</p>
<blockquote>
<div><ul class="simple">
<li><p>不可變物件。</p></li>
<li><p>閉包作為第一類物件。</p></li>
<li><p>靜態型別。</p></li>
<li><p>和型別 (Sum Type) 和積型別 (Product Type)。</p></li>
</ul>
</div></blockquote>
</div>
<div class="section" id="id1">
<h1>其他<a class="headerlink" href="#id1" title="Permalink to this headline"></a></h1>
<div class="section" id="id2">
<h2>垃圾回收<a class="headerlink" href="#id2" title="Permalink to this headline"></a></h2>
<p>先不實現垃圾回收。若是要實現垃圾回收，可以用引用記數。做一個這樣的表格：</p>
<table class="docutils align-default">
<colgroup>
<col style="width: 50%" />
<col style="width: 50%" />
</colgroup>
<tbody>
<tr class="row-odd"><td><p>記憶體位址</p></td>
<td><p>引用次數</p></td>
</tr>
<tr class="row-even"><td><p>0x12345</p>
<p>……</p>
</td>
<td><p>1</p>
<p>……</p>
</td>
</tr>
</tbody>
</table>
<p>以下有一個範例：</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>(Type IntPair (IntPair Int Int))
(def IntPair a (IntPair x y))
; 這個時候我們可以呼叫引用計數增加函數 inc_ref_count()
; inc_ref_count(&amp;a);
; inc_ref_count(&amp;x);
; inc_ref_count(&amp;y);
...程式碼
; x 活著的程式碼區段結束時，呼叫引用記數減少函數 dec_ref_count()
; dec_ref_count(&amp;a);
; dec_ref_count(&amp;a[0]); // &amp;x
; dec_ref_count(&amp;a[1]); // &amp;y
</pre></div>
</div>
</div>
<div class="section" id="id3">
<h2>實做方式<a class="headerlink" href="#id3" title="Permalink to this headline"></a></h2>
<p>用 Python3 將原始碼轉成 AST，以 s-expression 表示。再進行型別推測後，進行閉包轉換，不進行 CPS 變換，利用 llvmlite 生成 LLVM IR。</p>
<p>需要的東西：</p>
<ul class="simple">
<li><p>llvmlite</p></li>
<li><p>python3</p></li>
</ul>
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