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<!DOCTYPE html> <html lang="en"> <head> <title>andP -- parser conjunction</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 parsers" href="___Parser.html">Parser</a> » <a title="parser conjunction" href="_and__P.html">andP</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="__st_sp__Parser.html">next</a> | <a href="_or__P.html">previous</a> | <a href="__st_sp__Parser.html">forward</a> | <a href="_or__P.html">backward</a> | <a href="___Parser.html">up</a> | <a href="master.html">index</a> | <a href="toc.html">toc</a> </div> </div> <hr> <div> <h1>andP -- parser conjunction</h1> <ul> <li> <dl class="element"> <dt>Usage: </dt> <dd><code class="language-macaulay2">r = andP(p,q,...)</code></dd> </dl> </li> <li>Inputs: <ul> <li><span><span class="tt">(p,q,...)</span>, a sequence of parsers (of type <a title="the class of all parsers" href="___Parser.html">Parser</a>)</span></li> </ul> </li> <li>Outputs: <ul> <li><span><span class="tt">r</span>, <span>a <a title="the class of all parsers" href="___Parser.html">parser</a></span>, a parser that accepts as many tokens as <span class="tt">p</span> will accept, then as many as <span class="tt">q</span> will accept, and so on. The return value is the sequence of values returned by each of the input parsers.</span></li> </ul> </li> </ul> <div> <h2>Description</h2> <p>An abbreviation for <span class="tt">andP(p,q)</span> is <span class="tt">p@q</span>.</p> <p>If one of the arguments is <span>a <a title="the class of all strings" href="../../Macaulay2Doc/html/___String.html">string</a></span> then <a title="produce a parser that accepts a fixed string, one character at a time" href="_const__Parser.html">constParser</a> is used to convert it into a parser.</p> <table class="examples"> <tr> <td> <pre><code class="language-macaulay2">i1 : (constParser "abc" @ constParser "def" : charAnalyzer) "abcdef" o1 = (abc, def) o1 : Sequence</code></pre> </td> </tr> </table> </div> <div class="waystouse"> <div> <h2>Code</h2> <pre><code class="language-macaulay2">../Parsing.m2:120:19-128:12: --source code: Parser @ Parser := (p,q) -> new Parser from ( c -> ( if c =!= null then ( if (p' := p c) =!= null then p' @ q else if (val1 := p null) =!= null then if (q' := q c) =!= null then (val2 -> (val1,val2)) % q' ) else if (val1 = p null) =!= null and (val2 := q null) =!= null then (val1,val2) ))</code></pre> </div> </div> <div> <h2>See also</h2> <ul> <li><span><a title="produce a parser that accepts a fixed string, one character at a time" href="_const__Parser.html">constParser</a> -- produce a parser that accepts a fixed string, one character at a time</span></li> <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> </div> <div> <div class="waystouse"> <h2>For the programmer</h2> <p>The object <a title="parser conjunction" href="_and__P.html">andP</a> is <span>a <a title="the class of all function closures" href="../../Macaulay2Doc/html/___Function__Closure.html">function closure</a></span>.</p> </div> <hr> <div class="waystouse"> <p>The source of this document is in <span class="tt">Parsing.m2:377:0</span>.</p> </div> </div> </div> </body> </html>
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