A simple find-and-replace to convert inches to centimeters using a single ExpressionTransformer rule.

ID: 1354

See: Project: A Unit Conversion DSL 
				
					using uCalcSoftware;

var uc = new uCalc();
// Get the transformer that pre-processes expressions.
var t = uc.ExpressionTransformer;

// Define a rule to find "X in to cm" and replace it with the calculated value.
// Note: 'val' is captured as text and must be converted to a number with Double().
t.FromTo("{@Number:val} in to cm", "({@Eval: Double(val) * 2.54})");

// Use the new syntax directly in an expression.
Console.WriteLine(uc.EvalStr("10 in to cm"));
				
			
25.4
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					#include <iostream>
#include "uCalc.h"

using namespace std;
using namespace uCalcSoftware;

int main() {
   uCalc uc;
   // Get the transformer that pre-processes expressions.
   auto t = uc.ExpressionTransformer();

   // Define a rule to find "X in to cm" and replace it with the calculated value.
   // Note: 'val' is captured as text and must be converted to a number with Double().
   t.FromTo("{@Number:val} in to cm", "({@Eval: Double(val) * 2.54})");

   // Use the new syntax directly in an expression.
   cout << uc.EvalStr("10 in to cm") << endl;
}
				
			
25.4
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					Imports System
Imports uCalcSoftware
Public Module Program
   Public Sub Main()
      Dim uc As New uCalc()
      '// Get the transformer that pre-processes expressions.
      Dim t = uc.ExpressionTransformer
      
      '// Define a rule to find "X in to cm" and replace it with the calculated value.
      '// Note: 'val' is captured as text and must be converted to a number with Double().
      t.FromTo("{@Number:val} in to cm", "({@Eval: Double(val) * 2.54})")
      
      '// Use the new syntax directly in an expression.
      Console.WriteLine(uc.EvalStr("10 in to cm"))
   End Sub
End Module
				
			
25.4
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