A single-pass transformer that converts headers, list items, bold, and italic Markdown syntax to HTML.

ID: 1404

See: Project: Building a Markdown to HTML Converter 
				
					using uCalcSoftware;

var uc = new uCalc();
using (var t = new uCalc.Transformer()) {
   t.DefaultRuleSet.RewindOnChange = true;

   // 2. Define Rules (General rules first, specific rules last for LIFO precedence)

   // -- Inline rules --
   // Italic is defined before Bold, giving Bold higher precedence.
   t.FromTo("*{text}*", "<i>{text}</i>");
   t.FromTo("**{text}**", "<b>{text}</b>");

   // -- Block-level rules --
   t.FromTo("#{@Whitespace}{line}", "<h1>{line}</h1>");
   t.FromTo("*{@Whitespace}{line}", "<li>{line}</li>");
   t.FromTo("</li>{@nl}{@nl}", "</li>{@nl}</ul>{@nl}"); // {@nl} = NewLine
   t.FromTo("{@nl}{@nl}*{@Whitespace}", "{@nl}<ul>{@nl}* ");

   // 3. Define the input Markdown text
   var markdown = """

# Main Header

* First list item
* Second list item with **bold** text.
* Third list item with *italic* text.

Another paragraph with **bold** and *italic*.

""";

   // 4. Run the transformation and print the result
   Console.WriteLine(t.Transform(markdown));
}
				
			
<h1>Main Header</h1>
<ul>
<li>First list item</li>
<li>Second list item with <b>bold</b> text.</li>
<li>Third list item with <i>italic</i> text.</li>
</ul>
Another paragraph with <b>bold</b> and <i>italic</i>.
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					#include <iostream>
#include "uCalc.h"

using namespace std;
using namespace uCalcSoftware;

int main() {
   uCalc uc;
   {
      uCalc::Transformer t;
      t.Owned(); // Causes t to be released when it goes out of scope
      t.DefaultRuleSet().RewindOnChange(true);

      // 2. Define Rules (General rules first, specific rules last for LIFO precedence)

      // -- Inline rules --
      // Italic is defined before Bold, giving Bold higher precedence.
      t.FromTo("*{text}*", "<i>{text}</i>");
      t.FromTo("**{text}**", "<b>{text}</b>");

      // -- Block-level rules --
      t.FromTo("#{@Whitespace}{line}", "<h1>{line}</h1>");
      t.FromTo("*{@Whitespace}{line}", "<li>{line}</li>");
      t.FromTo("</li>{@nl}{@nl}", "</li>{@nl}</ul>{@nl}"); // {@nl} = NewLine
      t.FromTo("{@nl}{@nl}*{@Whitespace}", "{@nl}<ul>{@nl}* ");

      // 3. Define the input Markdown text
      auto markdown = R"(
# Main Header

* First list item
* Second list item with **bold** text.
* Third list item with *italic* text.

Another paragraph with **bold** and *italic*.
)";

      // 4. Run the transformation and print the result
      cout << t.Transform(markdown) << endl;
   }
}
				
			
<h1>Main Header</h1>
<ul>
<li>First list item</li>
<li>Second list item with <b>bold</b> text.</li>
<li>Third list item with <i>italic</i> text.</li>
</ul>
Another paragraph with <b>bold</b> and <i>italic</i>.
Explore 600+ other examples
				
					Imports System
Imports uCalcSoftware
Public Module Program
   Public Sub Main()
      Dim uc As New uCalc()
      Using t As New uCalc.Transformer()
         t.DefaultRuleSet.RewindOnChange = true
         
         '// 2. Define Rules (General rules first, specific rules last for LIFO precedence)
         
         '// -- Inline rules --
         '// Italic is defined before Bold, giving Bold higher precedence.
         t.FromTo("*{text}*", "<i>{text}</i>")
         t.FromTo("**{text}**", "<b>{text}</b>")
         
         '// -- Block-level rules --
         t.FromTo("#{@Whitespace}{line}", "<h1>{line}</h1>")
         t.FromTo("*{@Whitespace}{line}", "<li>{line}</li>")
         t.FromTo("</li>{@nl}{@nl}", "</li>{@nl}</ul>{@nl}") '// {@nl} = NewLine
         t.FromTo("{@nl}{@nl}*{@Whitespace}", "{@nl}<ul>{@nl}* ")
         
         '// 3. Define the input Markdown text
         Dim markdown = "
# Main Header

* First list item
* Second list item with **bold** text.
* Third list item with *italic* text.

Another paragraph with **bold** and *italic*.
"
         
         '// 4. Run the transformation and print the result
         Console.WriteLine(t.Transform(markdown))
      End Using
   End Sub
End Module
				
			
<h1>Main Header</h1>
<ul>
<li>First list item</li>
<li>Second list item with <b>bold</b> text.</li>
<li>Third list item with <i>italic</i> text.</li>
</ul>
Another paragraph with <b>bold</b> and <i>italic</i>.
Explore 600+ other examples