// Convert the given value to a boolean value.
public static bool ToBoolean(object value)
{
double d;
if (value == null || value is JUndefinedObject)
return false;
else if (value is bool)
return (bool)value;
else if (PrimSupport.AsNumber(value, out d))
return (d != 0 && !Double.IsNaN(d));
else if (value is string)
return ((string)value).Length > 0;
else
return true;
} // ToBoolean
} // ToString
// Convert the given value to a string value.
public static object ToObject(object value)
{
double d;
if (value is string)
return new JStringObject((string)value);
else if (PrimSupport.AsNumber(value, out d))
return new JNumberObject(d);
else if (value is bool)
return new JBooleanObject((bool)value);
else if (value == null)
throw new TypeError("attempt to convert null to an object");
else if (value is JUndefinedObject)
throw new TypeError("attempt to convert undefined to an object");
else
return value;
} // ToObject
} // ToUInt16
// Convert the given value to a string value.
public static string ToString(object value)
{
double d;
if (value is string)
return (string)value;
else if (PrimSupport.AsNumber(value, out d))
{
// HACK snewman 7/26/01: format according to grammar in 9.8.1 on p. 47
return System.Convert.ToString(d);
}
else if (value == null)
return "null";
else if (value is JUndefinedObject)
return "undefined";
else if (value is bool)
return (bool)value ? "true" : "false";
JObject asObj = value as JObject;
if (asObj != null)
return ToString(asObj.DefaultValue(JObject.ValueHintType.String));
else
return value.ToString();
} // ToString
} // ToBoolean
// Convert the given value to a numeric value.
public static double ToNumber(object value)
{
double d;
if (PrimSupport.AsNumber(value, out d))
return d;
else if (value == null)
return 0;
else if (value is JUndefinedObject)
return Double.NaN;
else if (value is bool)
return (bool)value ? 1 : 0;
else if (value is string)
{
// HACK snewman 7/26/01: parse according to grammar in 9.3.1 on p. 43
return System.Convert.ToDouble((string)value);
}
JObject asObj = value as JObject;
if (asObj != null)
return ToNumber(asObj.DefaultValue(JObject.ValueHintType.Number));
else
throw new TypeError("attempt to convert non-JavaScript object to number");
} // ToNumber
