A practical example using tags to build a simple syntax highlighter that categorizes matches.

ID: 995

See: Tag = [int] 
				
					using uCalcSoftware;

var uc = new uCalc();
// Practical: Basic Syntax Highlighter
var t = new uCalc.Transformer();

// Define categories with integer tags
var TAG_KEYWORD = 1;
var TAG_STRING = 2;
var TAG_COMMENT = 3;

// Define rules and tag them
t.Pattern("{ if | else | for | while }").SetTag(TAG_KEYWORD);
t.Pattern("{@String}").SetTag(TAG_STRING);
t.Pattern("// {text}").SetTag(TAG_COMMENT);

t.Text = """
for (i=0; i<10; i++) { s = "hello"; // comment }
""";
t.Find();

foreach(var match in t.Matches) {
   var tag = match.Rule.Tag;
   if (tag == TAG_KEYWORD) {
      Console.WriteLine($"TAG_KEYWORD: {match.Text}");
   } else if (tag == TAG_STRING) {
      Console.WriteLine($"TAG_STRING: {match.Text}");
   } else if (tag == TAG_COMMENT) {
      Console.WriteLine($"TAG_COMMENT: {match.Text}");
   }
}
				
			
TAG_KEYWORD: for
TAG_STRING: "hello"
TAG_COMMENT: // comment
Explore 600+ other examples
				
					#include <iostream>
#include "uCalc.h"

using namespace std;
using namespace uCalcSoftware;

int main() {
   uCalc uc;
   // Practical: Basic Syntax Highlighter
   uCalc::Transformer t;

   // Define categories with integer tags
   auto TAG_KEYWORD = 1;
   auto TAG_STRING = 2;
   auto TAG_COMMENT = 3;

   // Define rules and tag them
   t.Pattern("{ if | else | for | while }").SetTag(TAG_KEYWORD);
   t.Pattern("{@String}").SetTag(TAG_STRING);
   t.Pattern("// {text}").SetTag(TAG_COMMENT);

   t.Text(R"(for (i=0; i<10; i++) { s = "hello"; // comment })");
   t.Find();

   for(auto match : t.Matches()) {
      auto tag = match.Rule().Tag();
      if (tag == TAG_KEYWORD) {
         cout << "TAG_KEYWORD: " << match.Text() << endl;
      } else if (tag == TAG_STRING) {
         cout << "TAG_STRING: " << match.Text() << endl;
      } else if (tag == TAG_COMMENT) {
         cout << "TAG_COMMENT: " << match.Text() << endl;
      }
   }
}
				
			
TAG_KEYWORD: for
TAG_STRING: "hello"
TAG_COMMENT: // comment
Explore 600+ other examples
				
					Imports System
Imports uCalcSoftware
Public Module Program
   Public Sub Main()
      Dim uc As New uCalc()
      '// Practical: Basic Syntax Highlighter
      Dim t As New uCalc.Transformer()
      
      '// Define categories with integer tags
      Dim TAG_KEYWORD = 1
      Dim TAG_STRING = 2
      Dim TAG_COMMENT = 3
      
      '// Define rules and tag them
      t.Pattern("{ if | else | for | while }").SetTag(TAG_KEYWORD)
      t.Pattern("{@String}").SetTag(TAG_STRING)
      t.Pattern("// {text}").SetTag(TAG_COMMENT)
      
      t.Text = "for (i=0; i<10; i++) { s = ""hello""; // comment }"
      t.Find()
      
      For Each match In t.Matches
         Dim tag = match.Rule.Tag
         If tag = TAG_KEYWORD Then
            Console.WriteLine($"TAG_KEYWORD: {match.Text}")
            ElseIf tag = TAG_STRING Then
            Console.WriteLine($"TAG_STRING: {match.Text}")
            ElseIf tag = TAG_COMMENT Then
            Console.WriteLine($"TAG_COMMENT: {match.Text}")
         End If
      Next
   End Sub
End Module
				
			
TAG_KEYWORD: for
TAG_STRING: "hello"
TAG_COMMENT: // comment
Explore 600+ other examples