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___Analyzer.html
<!DOCTYPE html> <html lang="en"> <head> <title>Analyzer -- the class of all lexical analyzers</title> <meta content="text/html; charset=utf-8" http-equiv="Content-Type"> <link type="text/css" rel="stylesheet" href="../../../../Macaulay2/Style/doc.css"> <link rel="stylesheet" href="../../../../Macaulay2/Style/katex/katex.min.css"> <script defer="defer" src="../../../../Macaulay2/Style/katex/katex.min.js"></script> <script defer="defer" src="../../../../Macaulay2/Style/katex/contrib/auto-render.min.js"></script> <script> var macros = { "\\break": "\\\\", "\\ZZ": "\\mathbb{Z}", "\\NN": "\\mathbb{N}", "\\QQ": "\\mathbb{Q}", "\\RR": "\\mathbb{R}", "\\CC": "\\mathbb{C}", "\\PP": "\\mathbb{P}" }, delimiters = [ { left: "$$", right: "$$", display: true}, { left: "\\[", right: "\\]", display: true}, { left: "$", right: "$", display: false}, { left: "\\(", right: "\\)", display: false} ], ignoredTags = [ "kbd", "var", "samp", "script", "noscript", "style", "textarea", "pre", "code", "option" ]; document.addEventListener("DOMContentLoaded", function() { renderMathInElement(document.body, { delimiters: delimiters, macros: macros, ignoredTags: ignoredTags, trust: true }); }); </script> <style>.katex { font-size: 1em; }</style> <script defer="defer" src="../../../../Macaulay2/Style/katex/contrib/copy-tex.min.js"></script> <script defer="defer" src="../../../../Macaulay2/Style/katex/contrib/render-a11y-string.min.js"></script> <script src="../../../../Macaulay2/Style/prism.js"></script> <script>var current_version = '1.25.06';</script> <script src="../../../../Macaulay2/Style/version-select.js"></script> <link type="image/x-icon" rel="icon" href="../../../../Macaulay2/Style/icon.gif"> </head> <body> <div id="buttons"> <div> <a href="https://macaulay2.com/">Macaulay2</a> <span id="version-select-container"></span> » <a title="Macaulay2 documentation" href="../../Macaulay2Doc/html/index.html">Documentation </a> <br><a href="../../Macaulay2Doc/html/_packages_spprovided_spwith_sp__Macaulay2.html">Packages</a> » <span><a title="a framework for building parsers" href="index.html">Parsing</a> » <a title="the class of all lexical analyzers" href="___Analyzer.html">Analyzer</a></span> </div> <div class="right"> <form method="get" action="https://www.google.com/search"> <input placeholder="Search" type="text" name="q" value=""> <input type="hidden" name="q" value="site:macaulay2.com/doc"> </form> <a href="___Parser.html">next</a> | previous | <a href="_char__Analyzer.html">forward</a> | <a href="index.html">backward</a> | <a href="index.html">up</a> | <a href="master.html">index</a> | <a href="toc.html">toc</a> </div> </div> <hr> <div> <h1>Analyzer -- the class of all lexical analyzers</h1> <div> <h2>Description</h2> <p>A function that accepts input in its original form and separates it into tokens, will be called <span>a <a title="the class of all lexical analyzers" href="___Analyzer.html">lexical analyzer</a></span>. These analyzers are functional: call one with the original input, and it returns a function of 0 arguments (with changeable internal state) that keeps returning tokens each time it is called until none are left. Actually, the analyzer is to return a pair: <span class="tt">(pos,token)</span>, where <span class="tt">pos</span> is a string indicating the position where <span class="tt">token</span> was found in the input. A position will be a sort of thing which can be converted to string with <a title="convert to a string" href="../../Macaulay2Doc/html/_to__String.html">toString</a> (for printing error messages) and can be sorted.</p> </div> <div> <h3>Menu</h3> <ul> <li><span><a title="a lexical analyzer that provides characters from a string one at a time" href="_char__Analyzer.html">charAnalyzer</a> -- a lexical analyzer that provides characters from a string one at a time</span></li> <li><span><a title="a lexical analyzer that provides non-white-space characters from a string one at a time" href="_nonspace__Analyzer.html">nonspaceAnalyzer</a> -- a lexical analyzer that provides non-white-space characters from a string one at a time</span></li> </ul> </div> <div> <div class="waystouse"> <h2>Methods that use a lexical analyzer:</h2> <ul> <li><span><a title="combine a parser with a lexical analyzer to make a complete system" href="___Parser_sp_co_sp__Analyzer.html">Parser : Analyzer</a> -- combine a parser with a lexical analyzer to make a complete system</span></li> </ul> <h2>Protected objects of class <span class="tt">Analyzer</span>:</h2> <ul> <li><span><a title="a lexical analyzer that provides characters from a string one at a time" href="_char__Analyzer.html">charAnalyzer</a> -- a lexical analyzer that provides characters from a string one at a time</span></li> <li><span><a title="a lexical analyzer that provides non-white-space characters from a string one at a time" href="_nonspace__Analyzer.html">nonspaceAnalyzer</a> -- a lexical analyzer that provides non-white-space characters from a string one at a time</span></li> </ul> </div> <div class="waystouse"> <h2>For the programmer</h2> <p>The object <a title="the class of all lexical analyzers" href="___Analyzer.html">Analyzer</a> is <span>a <a title="the class of all self initializing types" href="../../Macaulay2Doc/html/___Self__Initializing__Type.html">self initializing type</a></span>, with ancestor classes <a title="the class of all function closures" href="../../Macaulay2Doc/html/___Function__Closure.html">FunctionClosure</a> < <a title="the class of all functions" href="../../Macaulay2Doc/html/___Function.html">Function</a> < <a title="the class of all things" href="../../Macaulay2Doc/html/___Thing.html">Thing</a>.</p> </div> <hr> <div class="waystouse"> <p>The source of this document is in <span class="tt">Parsing.m2:233:0</span>.</p> </div> </div> </div> </body> </html>