Defines a C-style line comment token (`//...`) and categorizes it as whitespace so it is ignored by the parser.

ID: 1006

See: Add(string, TokenType, string, int, RegExGrammar, int), Introduction 
				
					using uCalcSoftware;

var uc = new uCalc();
var t = uc.NewTransformer();
// By default, a comment would cause a syntax error.
Console.Write("Before: ");
Console.WriteLine(uc.EvalStr("10 + 5 // Add 5"));

// Add a new token definition for C-style comments.
// The regex `//.*` matches from '//' to the end of the line.
// We classify it as Whitespace so the parser skips it.
uc.ExpressionTokens.Add("//.*", TokenType.Whitespace);

Console.Write("After:  ");
Console.WriteLine(uc.EvalStr("10 + 5 // Add 5"));
				
			
Before: Undefined identifier
After:  15
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					#include <iostream>
#include "uCalc.h"

using namespace std;
using namespace uCalcSoftware;

int main() {
   uCalc uc;
   auto t = uc.NewTransformer();
   // By default, a comment would cause a syntax error.
   cout << "Before: ";
   cout << uc.EvalStr("10 + 5 // Add 5") << endl;

   // Add a new token definition for C-style comments.
   // The regex `//.*` matches from '//' to the end of the line.
   // We classify it as Whitespace so the parser skips it.
   uc.ExpressionTokens().Add("//.*", TokenType::Whitespace);

   cout << "After:  ";
   cout << uc.EvalStr("10 + 5 // Add 5") << endl;
}
				
			
Before: Undefined identifier
After:  15
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					Imports System
Imports uCalcSoftware
Public Module Program
   Public Sub Main()
      Dim uc As New uCalc()
      Dim t = uc.NewTransformer()
      '// By default, a comment would cause a syntax error.
      Console.Write("Before: ")
      Console.WriteLine(uc.EvalStr("10 + 5 // Add 5"))
      
      '// Add a new token definition for C-style comments.
      '// The regex `//.*` matches from '//' to the end of the line.
      '// We classify it as Whitespace so the parser skips it.
      uc.ExpressionTokens.Add("//.*", TokenType.Whitespace)
      
      Console.Write("After:  ")
      Console.WriteLine(uc.EvalStr("10 + 5 // Add 5"))
   End Sub
End Module
				
			
Before: Undefined identifier
After:  15
Explore 600+ other examples