A complete, single-pass transformer that converts common BBCode tags (bold, italic, underline, URL, and quote) to their Markdown equivalents.

ID: 1434

See: Project: Implementing a BBCode to Markdown Converter 
				
					using uCalcSoftware;

var uc = new uCalc();
// 1. Setup the Transformer
using (var t = new uCalc.Transformer()) {
   // Allow patterns to match across multiple lines
   t.DefaultRuleSet.StatementSensitive = false;

   // 2. Define the conversion rules

   // Simple inline tags
   t.FromTo("'['b']'{text}'['/b']'", "**{text}**");
   t.FromTo("'['i']'{text}'['/i']'", "*{text}*");
   t.FromTo("'['u']'{text}'['/u']'", "<u>{text}</u>");

   // URL tag with attribute
   t.FromTo("'['url={href}']'{text}'['/url']'", "[{text}]({href})");

   // Quote block tag
   t.FromTo("'['quote']'{content}'['/quote']'", "> {content}");

   // 3. Define the input BBCode text
   var bbCode = """

Hello, this is a test of the converter.

This text is [b]bold[/b] and this is [i]italic[/i].
You can also [u]underline[/u] text.

Here is a link to the uCalc website: [url=https://www.ucalc.com]uCalc[/url].

[quote]This is a block of quoted text.
It can span multiple lines.[/quote]

""";

   // 4. Run the transformation and print the result
   Console.WriteLine(t.Transform(bbCode));
}
				
			
Hello, this is a test of the converter.

This text is **bold** and this is *italic*.
You can also <u>underline</u> text.

Here is a link to the uCalc website: [uCalc](https://www.ucalc.com).

> This is a block of quoted text.
It can span multiple lines.
Explore 600+ other examples
				
					#include <iostream>
#include "uCalc.h"

using namespace std;
using namespace uCalcSoftware;

int main() {
   uCalc uc;
   // 1. Setup the Transformer
   {
      uCalc::Transformer t;
      t.Owned(); // Causes t to be released when it goes out of scope
      // Allow patterns to match across multiple lines
      t.DefaultRuleSet().StatementSensitive(false);

      // 2. Define the conversion rules

      // Simple inline tags
      t.FromTo("'['b']'{text}'['/b']'", "**{text}**");
      t.FromTo("'['i']'{text}'['/i']'", "*{text}*");
      t.FromTo("'['u']'{text}'['/u']'", "<u>{text}</u>");

      // URL tag with attribute
      t.FromTo("'['url={href}']'{text}'['/url']'", "[{text}]({href})");

      // Quote block tag
      t.FromTo("'['quote']'{content}'['/quote']'", "> {content}");

      // 3. Define the input BBCode text
      auto bbCode = R"(
Hello, this is a test of the converter.

This text is [b]bold[/b] and this is [i]italic[/i].
You can also [u]underline[/u] text.

Here is a link to the uCalc website: [url=https://www.ucalc.com]uCalc[/url].

[quote]This is a block of quoted text.
It can span multiple lines.[/quote]
)";

      // 4. Run the transformation and print the result
      cout << t.Transform(bbCode) << endl;
   }
}
				
			
Hello, this is a test of the converter.

This text is **bold** and this is *italic*.
You can also <u>underline</u> text.

Here is a link to the uCalc website: [uCalc](https://www.ucalc.com).

> This is a block of quoted text.
It can span multiple lines.
Explore 600+ other examples
				
					Imports System
Imports uCalcSoftware
Public Module Program
   Public Sub Main()
      Dim uc As New uCalc()
      '// 1. Setup the Transformer
      Using t As New uCalc.Transformer()
         '// Allow patterns to match across multiple lines
         t.DefaultRuleSet.StatementSensitive = false
         
         '// 2. Define the conversion rules
         
         '// Simple inline tags
         t.FromTo("'['b']'{text}'['/b']'", "**{text}**")
         t.FromTo("'['i']'{text}'['/i']'", "*{text}*")
         t.FromTo("'['u']'{text}'['/u']'", "<u>{text}</u>")
         
         '// URL tag with attribute
         t.FromTo("'['url={href}']'{text}'['/url']'", "[{text}]({href})")
         
         '// Quote block tag
         t.FromTo("'['quote']'{content}'['/quote']'", "> {content}")
         
         '// 3. Define the input BBCode text
         Dim bbCode = "
Hello, this is a test of the converter.

This text is [b]bold[/b] and this is [i]italic[/i].
You can also [u]underline[/u] text.

Here is a link to the uCalc website: [url=https://www.ucalc.com]uCalc[/url].

[quote]This is a block of quoted text.
It can span multiple lines.[/quote]
"
         
         '// 4. Run the transformation and print the result
         Console.WriteLine(t.Transform(bbCode))
      End Using
   End Sub
End Module
				
			
Hello, this is a test of the converter.

This text is **bold** and this is *italic*.
You can also <u>underline</u> text.

Here is a link to the uCalc website: [uCalc](https://www.ucalc.com).

> This is a block of quoted text.
It can span multiple lines.
Explore 600+ other examples