public static Expression Var(IList <Expression> values, Stack <Expression> stack = null, JsonLogicOptions options = null)
{
if (values.Count < 1)
{
throw new JsonLogicException();
}
var a = values[0];
if (a is ConstantExpression ce)
{
if (ce.Value is string str)
{
try
{
return(JsonLogic.GetProperty(str, stack, options));
}
catch (JsonLogicException)
{
if (values.Count > 1)
{
return(values[1]);
}
throw;
}
}
if (ce.Type.IsNumericType())
{
var array = stack?.FirstOrDefault(e => e.Type.IsArray);
if (array != default)
{
return(Expression.ArrayAccess(array, ce.EnsureIndexNumber()));
}
}
}
throw new JsonLogicException();
}
public override Delegate Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) => JsonLogic.Parse <bool>(ref reader, typeof(T)).Compile();
public override void Write(Utf8JsonWriter writer, Delegate value, JsonSerializerOptions options) => JsonLogic.Assemble(writer, value, options);