v2.7.1

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• ADDED: IsExpressionValue property to the VariableFactoryArgument. When true, a parameter will no longer be used from the value, the expression will be returned directly. This new option allows creating dictionary value on the fly.

var variables = new Dictionary<string, object>();
var eval = new EvalContext();

eval.VariableFactory = argument =>
{
    variables[argument.Name] = 2;
    argument.IsHandled = true;
    argument.IsExpressionValue = true;

    var dict = Expression.Constant(variables);
    var dictionaryItemPropertyInfo = typeof(IDictionary).GetProperty("Item", new[] { typeof(string) });
    Expression innerExpression = Expression.Property(dict, dictionaryItemPropertyInfo, Expression.Constant(argument.Name));
    argument.Value = Expression.Convert(innerExpression, typeof(int));
};

eval.Execute("x = 0; x = 6 + x;", variables);
var value = variables["x"];
var counter = variables.Count;

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