v2.7.2

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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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v2.7.0

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• ADDED: Code Compiler now return additional information when an exception happens
• ADDED: Using one dictionary + parameter from key now change dictionary value
• ADDED: Using ExpandoObject + parameter from key now change ExpandoObject value

var variables = new Dictionary<string, object>();
variables.Add("x", 0);

Eval.Execute("x = 2;", variables);
var x2 = variables["x"];

dynamic expandoObject = new ExpandoObject();

expandoObject.x = 2;

Eval.Execute("x = 0;", expandoObject);
var x = expandoObject.x;

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v2.6.5

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v2.6.3

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FIXED: Issue with (??) operator not converting the right part.

var data = new Dictionary<string, double?> { { "A", 2 }, { "B", 3 }, { "C", null } };
var result = Z.Expressions.Eval.Execute<double?>("A + B + C ?? 7", data);

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v2.6.2

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ADDED: Support to nullable when using directly dictionary key for a null value

var data = new Dictionary<string, double?> { { "A", 2 }, { "B", 3 }, { "C", null } };
var result = Z.Expressions.Eval.Execute<double?>("A + B + C.GetValueOrDefault(0)", data);

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v2.5.0

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FIXED: Issue with method overload + double type

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v2.4.21

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ADDED: VariableFactory event (Assign variable value on the fly)

var context = new EvalContext();

context.VariableFactory = arg =>
{
    var name = arg.Name;
    if (name == "X")
    {
        arg.Value = 2;
        arg.IsHandled = true;
    }
    else if (name == "Y")
    {
        arg.Value = 3;
        arg.IsHandled = true;
    }
};

var r = context.Execute("X + Y");

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v2.4.20

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ADDED: Support for implicit operator for method parameter

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v2.4.19

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