boolean expression with decimals

[jpoorrandp]

Is it possible to use decimal type in a boolean expression such as:: "myDecVar >= 10.0" ?

If MyDecVar is something like 3.1, flee throws an error, saying:

"Error: CompareElement: Operation 'GreaterThanOrEqual' is not defined for types 'Decimal' and 'Double'"

Same for GreaterThan and Equals.

Works fine with integers.
Is there a way to use decimals this way in flee, or should I just convert to decimals.
Thanks
Jonathan

[silvairsoares]

For this type of operation, you may need to configure the locale of the expression resolver.

Here I did something like this:

using Flee.PublicTypes;

public class DynamicExpressions
{
	private readonly ExpressionContext expressionContext = new();

	public DynamicExpressions()
	{
		// Inclusion of System.Math, to allow the use of all its methods
		expressionContext.Imports.AddType(typeof(Math), "Math");

		// Regionality settings
		expressionContext.ParserOptions.DecimalSeparator = '.';
		expressionContext.ParserOptions.FunctionArgumentSeparator = ',';
		expressionContext.ParserOptions.RecreateParser();
	}

	/// <summary>
	/// Receives a boolean expression in string format and returns the result
	/// <Examples: "(10.90 - 5.0 < 0.0)", "("123" <> "")"
	/// </summary>
	/// <param name="expression"></param>
	/// <returns></returns>
	public bool EvaluateBoolExpression(string expression)
	{
		bool result;
		try
		{
			IGenericExpression<bool> e = expressionContext.CompileGeneric<bool>(expression);
			result = e.Evaluate();
		}
		catch (Exception ex)
		{
			throw new Exception("Erro ao validar a expressão booleana: (" + expression + ") - '" + ex.Message + "'");
		}
		return result;
	}

	// Example of using a System.Math method
	// double valorArredondado = expressionContext.CompileGeneric<double>("Math.Round(1.55540040, 2)").Evaluate();
	public double EvaluateDoubleExpression(string expression)
	{
		double result;

		try
			IGenericExpression<double> e = expressionContext.CompileGeneric<double>(expression);
			result = e.Evaluate();
		}
		catch (Exception ex)
		{
			throw new Exception("Error validating mathematical expression: (" + expression + ") - '" + ex.Message + "'");
		}
		return result;
	}
}