/// <summary>
/// Converts any JavaScript value to a primitive string value.
/// </summary>
/// <param name="value"> The value to convert. </param>
/// <returns> A primitive string value. </returns>
public static string ToString(object value)
{
if (value == null || value == Undefined.Value)
{
return("undefined");
}
if (value == Null.Value)
{
return("null");
}
if (value is bool)
{
return((bool)value ? "true" : "false");
}
if (value is int)
{
return(((int)value).ToString());
}
if (value is uint)
{
return(((uint)value).ToString());
}
if (value is double)
{
// Check if the value is in the cache.
double doubleValue = (double)value;
var cache = numberToStringCache;
if (doubleValue == cache.Value)
{
return(cache.Result);
}
// Convert the number to a string.
var result = NumberFormatter.ToString((double)value, 10, NumberFormatter.Style.Regular);
// Cache the result.
// This is thread-safe on Intel but not architectures with weak write ordering.
numberToStringCache = new NumberToStringCache()
{
Value = doubleValue, Result = result
};
return(result);
}
if (value is string)
{
return((string)value);
}
if (value is ConcatenatedString)
{
return(value.ToString());
}
if (value is SymbolInstance)
{
throw new JavaScriptException(((SymbolInstance)value).Engine, ErrorType.TypeError, "Cannot convert a Symbol value to a string.");
}
if (value is ObjectInstance)
{
return(ToString(ToPrimitive(value, PrimitiveTypeHint.String)));
}
throw new ArgumentException(string.Format("Cannot convert object of type '{0}' to a string.", value.GetType()), nameof(value));
}