// HACK snewman 7/26/01: ensure that the type analysis in these methods is
// complete, e.g. that "value is double" will fire for all numeric values.
// Might need to add additional tests for 64-bit int, for example.
// Convert the given value to a primitive type.
public static object ToPrimitive(object value, JObject.ValueHintType hint)
{
// If the value is already a JavaScript primitive type, just return it.
if (JObject.IsPrimitive(value))
return value;
// Otherwise, convert it to a primitive.
JObject asObj = value as JObject;
if (asObj != null)
return asObj.DefaultValue(hint);
else
throw new TypeError("attempt to convert non-JavaScript object to primitive");
} // ToPrimitive
} // 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
