Demonstrates the Transformer's token-aware safety by correctly renaming a variable without corrupting a string literal or comment.

ID: 1264

See: uCalc Transformer 
				
					using uCalcSoftware;

var uc = new uCalc();
var t = new uCalc.Transformer();

// Turn single-line comments into whitespace tokens (to be ignored)
t.Tokens.Add("//.*", TokenType.Whitespace);

// Define a rule to replace the alphanumeric token 'x' with 'value'
t.FromTo("x", "value");

var code = "x = 10; print('The max value is x.'); // x is 10 here";

// The Transformer correctly identifies that only the first 'x' is
// a token on its own. Imbedded occurrences of 'x' are left alone.
Console.WriteLine(t.Transform(code));
				
			
value = 10; print('The max value is x.'); // x is 10 here
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					#include <iostream>
#include "uCalc.h"

using namespace std;
using namespace uCalcSoftware;

int main() {
   uCalc uc;
   uCalc::Transformer t;

   // Turn single-line comments into whitespace tokens (to be ignored)
   t.Tokens().Add("//.*", TokenType::Whitespace);

   // Define a rule to replace the alphanumeric token 'x' with 'value'
   t.FromTo("x", "value");

   auto code = "x = 10; print('The max value is x.'); // x is 10 here";

   // The Transformer correctly identifies that only the first 'x' is
   // a token on its own. Imbedded occurrences of 'x' are left alone.
   cout << t.Transform(code) << endl;
}
				
			
value = 10; print('The max value is x.'); // x is 10 here
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					Imports System
Imports uCalcSoftware
Public Module Program
   Public Sub Main()
      Dim uc As New uCalc()
      Dim t As New uCalc.Transformer()
      
      '// Turn single-line comments into whitespace tokens (to be ignored)
      t.Tokens.Add("//.*", TokenType.Whitespace)
      
      '// Define a rule to replace the alphanumeric token 'x' with 'value'
      t.FromTo("x", "value")
      
      Dim code = "x = 10; print('The max value is x.'); // x is 10 here"
      
      '// The Transformer correctly identifies that only the first 'x' is
      '// a token on its own. Imbedded occurrences of 'x' are left alone.
      Console.WriteLine(t.Transform(code))
   End Sub
End Module
				
			
value = 10; print('The max value is x.'); // x is 10 here
Explore 600+ other examples