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diff .cms/lib/codemirror/mode/ebnf/index.html @ 0:78edf6b517a0 draft

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24.10
author Coffee CMS <info@coffee-cms.ru>
date Fri, 11 Oct 2024 22:40:23 +0000
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.cms/lib/codemirror/mode/ebnf/index.html	Fri Oct 11 22:40:23 2024 +0000
@@ -0,0 +1,102 @@
+<!doctype html>
+<html>
+  <head>
+    <title>CodeMirror: EBNF Mode</title>
+    <meta charset="utf-8"/>
+    <link rel=stylesheet href="../../doc/docs.css">
+
+    <link rel="stylesheet" href="../../lib/codemirror.css">
+    <script src="../../lib/codemirror.js"></script>
+    <script src="../javascript/javascript.js"></script>
+    <script src="ebnf.js"></script>
+    <style>.CodeMirror {border-top: 1px solid black; border-bottom: 1px solid black;}</style>
+  </head>
+  <body>
+    <div id=nav>
+      <a href="https://codemirror.net/5"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png" alt=""></a>
+
+      <ul>
+        <li><a href="../../index.html">Home</a>
+        <li><a href="../../doc/manual.html">Manual</a>
+        <li><a href="https://github.com/codemirror/codemirror5">Code</a>
+      </ul>
+      <ul>
+        <li><a href="../index.html">Language modes</a>
+        <li><a class=active href="#">EBNF Mode</a>
+      </ul>
+    </div>
+
+    <article>
+      <h2>EBNF Mode (bracesMode setting = "javascript")</h2>
+      <form><textarea id="code" name="code">
+/* description: Parses end executes mathematical expressions. */
+
+/* lexical grammar */
+%lex
+
+%%
+\s+                   /* skip whitespace */
+[0-9]+("."[0-9]+)?\b  return 'NUMBER';
+"*"                   return '*';
+"/"                   return '/';
+"-"                   return '-';
+"+"                   return '+';
+"^"                   return '^';
+"("                   return '(';
+")"                   return ')';
+"PI"                  return 'PI';
+"E"                   return 'E';
+&lt;&lt;EOF&gt;&gt;               return 'EOF';
+
+/lex
+
+/* operator associations and precedence */
+
+%left '+' '-'
+%left '*' '/'
+%left '^'
+%left UMINUS
+
+%start expressions
+
+%% /* language grammar */
+
+expressions
+: e EOF
+{print($1); return $1;}
+;
+
+e
+: e '+' e
+{$$ = $1+$3;}
+| e '-' e
+{$$ = $1-$3;}
+| e '*' e
+{$$ = $1*$3;}
+| e '/' e
+{$$ = $1/$3;}
+| e '^' e
+{$$ = Math.pow($1, $3);}
+| '-' e %prec UMINUS
+{$$ = -$2;}
+| '(' e ')'
+{$$ = $2;}
+| NUMBER
+{$$ = Number(yytext);}
+| E
+{$$ = Math.E;}
+| PI
+{$$ = Math.PI;}
+;</textarea></form>
+      <script>
+        var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
+          mode: {name: "ebnf"},
+          lineNumbers: true,
+          bracesMode: 'javascript'
+        });
+      </script>
+      <h3>The EBNF Mode</h3>
+      <p> Created by <a href="https://github.com/robertleeplummerjr">Robert Plummer</a></p>
+    </article>
+  </body>
+</html>