168 lines
9.1 KiB
HTML
168 lines
9.1 KiB
HTML
|
||
<!DOCTYPE html>
|
||
|
||
<html>
|
||
<head>
|
||
<meta charset="utf-8" />
|
||
<meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" />
|
||
|
||
<title>Parsing Text into Joy Expressions — Thun 0.4.1 documentation</title>
|
||
<link rel="stylesheet" type="text/css" href="_static/pygments.css" />
|
||
<link rel="stylesheet" type="text/css" href="_static/alabaster.css" />
|
||
<script data-url_root="./" id="documentation_options" src="_static/documentation_options.js"></script>
|
||
<script src="_static/jquery.js"></script>
|
||
<script src="_static/underscore.js"></script>
|
||
<script src="_static/doctools.js"></script>
|
||
<link rel="index" title="Index" href="genindex.html" />
|
||
<link rel="search" title="Search" href="search.html" />
|
||
<link rel="next" title="Tracing Joy Execution" href="pretty.html" />
|
||
<link rel="prev" title="Stack or Quote or Sequence or List…" href="stack.html" />
|
||
|
||
<link rel="stylesheet" href="_static/custom.css" type="text/css" />
|
||
|
||
|
||
<meta name="viewport" content="width=device-width, initial-scale=0.9, maximum-scale=0.9" />
|
||
|
||
</head><body>
|
||
|
||
|
||
<div class="document">
|
||
<div class="documentwrapper">
|
||
<div class="bodywrapper">
|
||
|
||
|
||
<div class="body" role="main">
|
||
|
||
<section id="parsing-text-into-joy-expressions">
|
||
<h1>Parsing Text into Joy Expressions<a class="headerlink" href="#parsing-text-into-joy-expressions" title="Permalink to this headline">¶</a></h1>
|
||
<p>TODO: example…</p>
|
||
<section id="module-joy.parser">
|
||
<span id="joy-parser"></span><h2><code class="docutils literal notranslate"><span class="pre">joy.parser</span></code><a class="headerlink" href="#module-joy.parser" title="Permalink to this headline">¶</a></h2>
|
||
<p>This module exports a single function for converting text to a joy
|
||
expression as well as a single Symbol class and a single Exception type.</p>
|
||
<p>The Symbol string class is used by the interpreter to recognize literals
|
||
by the fact that they are not Symbol objects.</p>
|
||
<p>A crude grammar:</p>
|
||
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">joy</span> <span class="o">=</span> <span class="n">term</span><span class="o">*</span>
|
||
<span class="n">term</span> <span class="o">=</span> <span class="nb">int</span> <span class="o">|</span> <span class="nb">float</span> <span class="o">|</span> <span class="n">string</span> <span class="o">|</span> <span class="s1">'['</span> <span class="n">joy</span> <span class="s1">']'</span> <span class="o">|</span> <span class="n">symbol</span>
|
||
</pre></div>
|
||
</div>
|
||
<p>A Joy expression is a sequence of zero or more terms. A term is a
|
||
literal value (integer, float, string, or Joy expression) or a function
|
||
symbol. Function symbols are unquoted strings and cannot contain square
|
||
brackets. Terms must be separated by blanks, which can be omitted
|
||
around square brackets.</p>
|
||
<dl class="py exception">
|
||
<dt class="sig sig-object py" id="joy.parser.ParseError">
|
||
<em class="property"><span class="pre">exception</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">joy.parser.</span></span><span class="sig-name descname"><span class="pre">ParseError</span></span><a class="reference internal" href="_modules/joy/parser.html#ParseError"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#joy.parser.ParseError" title="Permalink to this definition">¶</a></dt>
|
||
<dd><p>Raised when there is a error while parsing text.</p>
|
||
</dd></dl>
|
||
|
||
<dl class="py class">
|
||
<dt class="sig sig-object py" id="joy.parser.Symbol">
|
||
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">joy.parser.</span></span><span class="sig-name descname"><span class="pre">Symbol</span></span><a class="reference internal" href="_modules/joy/parser.html#Symbol"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#joy.parser.Symbol" title="Permalink to this definition">¶</a></dt>
|
||
<dd><p>A string class that represents Joy function names.</p>
|
||
</dd></dl>
|
||
|
||
<dl class="py function">
|
||
<dt class="sig sig-object py" id="joy.parser.text_to_expression">
|
||
<span class="sig-prename descclassname"><span class="pre">joy.parser.</span></span><span class="sig-name descname"><span class="pre">text_to_expression</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">text</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="_modules/joy/parser.html#text_to_expression"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#joy.parser.text_to_expression" title="Permalink to this definition">¶</a></dt>
|
||
<dd><p>Convert a string to a Joy expression.</p>
|
||
<p>When supplied with a string this function returns a Python datastructure
|
||
that represents the Joy datastructure described by the text expression.
|
||
Any unbalanced square brackets will raise a ParseError.</p>
|
||
<dl class="field-list simple">
|
||
<dt class="field-odd">Parameters</dt>
|
||
<dd class="field-odd"><p><strong>text</strong> (<em>str</em>) – Text to convert.</p>
|
||
</dd>
|
||
<dt class="field-even">Return type</dt>
|
||
<dd class="field-even"><p>stack</p>
|
||
</dd>
|
||
<dt class="field-odd">Raises</dt>
|
||
<dd class="field-odd"><p><a class="reference internal" href="#joy.parser.ParseError" title="joy.parser.ParseError"><strong>ParseError</strong></a> – if the parse fails.</p>
|
||
</dd>
|
||
</dl>
|
||
</dd></dl>
|
||
|
||
</section>
|
||
<section id="parser-internals">
|
||
<h2>Parser Internals<a class="headerlink" href="#parser-internals" title="Permalink to this headline">¶</a></h2>
|
||
<p>TODO: Document things like the regular expressions used for tokenizing, and the re.Scanner, etc…</p>
|
||
</section>
|
||
</section>
|
||
|
||
|
||
</div>
|
||
|
||
</div>
|
||
</div>
|
||
<div class="sphinxsidebar" role="navigation" aria-label="main navigation">
|
||
<div class="sphinxsidebarwrapper">
|
||
<h1 class="logo"><a href="index.html">Thun</a></h1>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<h3>Navigation</h3>
|
||
<ul class="current">
|
||
<li class="toctree-l1"><a class="reference internal" href="notebooks/Intro.html">Thun: Joy in Python</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="joy.html">Joy Interpreter</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="stack.html">Stack or Quote or Sequence or List…</a></li>
|
||
<li class="toctree-l1 current"><a class="current reference internal" href="#">Parsing Text into Joy Expressions</a><ul>
|
||
<li class="toctree-l2"><a class="reference internal" href="#module-joy.parser"><code class="docutils literal notranslate"><span class="pre">joy.parser</span></code></a></li>
|
||
<li class="toctree-l2"><a class="reference internal" href="#parser-internals">Parser Internals</a></li>
|
||
</ul>
|
||
</li>
|
||
<li class="toctree-l1"><a class="reference internal" href="pretty.html">Tracing Joy Execution</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="library.html">Function Reference</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="lib.html">Functions Grouped by, er, Function with Examples</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="types.html">Type Inference of Joy Expressions</a></li>
|
||
<li class="toctree-l1"><a class="reference internal" href="notebooks/index.html">Essays about Programming in Joy</a></li>
|
||
</ul>
|
||
|
||
<div class="relations">
|
||
<h3>Related Topics</h3>
|
||
<ul>
|
||
<li><a href="index.html">Documentation overview</a><ul>
|
||
<li>Previous: <a href="stack.html" title="previous chapter">Stack or Quote or Sequence or List…</a></li>
|
||
<li>Next: <a href="pretty.html" title="next chapter">Tracing Joy Execution</a></li>
|
||
</ul></li>
|
||
</ul>
|
||
</div>
|
||
<div id="searchbox" style="display: none" role="search">
|
||
<h3 id="searchlabel">Quick search</h3>
|
||
<div class="searchformwrapper">
|
||
<form class="search" action="search.html" method="get">
|
||
<input type="text" name="q" aria-labelledby="searchlabel" autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false"/>
|
||
<input type="submit" value="Go" />
|
||
</form>
|
||
</div>
|
||
</div>
|
||
<script>$('#searchbox').show(0);</script>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
</div>
|
||
</div>
|
||
<div class="clearer"></div>
|
||
</div>
|
||
<div class="footer" role="contentinfo">
|
||
<a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/">
|
||
<img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by-nc-sa/4.0/88x31.png" />
|
||
</a>
|
||
<br />
|
||
<span xmlns:dct="http://purl.org/dc/terms/" property="dct:title">Thun Documentation</span> by <a xmlns:cc="http://creativecommons.org/ns#" href="https://joypy.osdn.io/" property="cc:attributionName" rel="cc:attributionURL">Simon Forman</a> is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/">Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License</a>.<br />Based on a work at <a xmlns:dct="http://purl.org/dc/terms/" href="https://osdn.net/projects/joypy/" rel="dct:source">https://osdn.net/projects/joypy/</a>.
|
||
Created using <a href="http://sphinx-doc.org/">Sphinx</a> 4.3.0.
|
||
</div>
|
||
|
||
</body>
|
||
</html> |