/// <summary>
/// Gets a relative weight of how much the conversion is matching the given types.
/// Implementation must follow that of DynValueToObjectOfType.. it's not very DRY in that sense.
/// However here we are in perf-sensitive path.. TODO : double-check the gain and see if a DRY impl is better.
/// </summary>
internal static int DynValueToObjectOfTypeWeight(DynValue value, Type desiredType, bool isOptional)
{
if (desiredType.IsByRef)
{
desiredType = desiredType.GetElementType();
}
var customConverter = Script.GlobalOptions.CustomConverters.GetScriptToClrCustomConversion(value.Type, desiredType);
if (customConverter != null)
{
return(WEIGHT_CUSTOM_CONVERTER_MATCH);
}
if (desiredType == typeof(DynValue))
{
return(WEIGHT_EXACT_MATCH);
}
if (desiredType == typeof(object))
{
return(WEIGHT_EXACT_MATCH);
}
StringConversions.StringSubtype stringSubType = StringConversions.GetStringSubtype(desiredType);
Type nt = Nullable.GetUnderlyingType(desiredType);
Type nullableType = null;
if (nt != null)
{
nullableType = desiredType;
desiredType = nt;
}
switch (value.Type)
{
case DataType.Void:
if (isOptional)
{
return(WEIGHT_VOID_WITH_DEFAULT);
}
else if ((!Framework.Do.IsValueType(desiredType)) || (nullableType != null))
{
return(WEIGHT_VOID_WITHOUT_DEFAULT);
}
break;
case DataType.Nil:
if (Framework.Do.IsValueType(desiredType))
{
if (nullableType != null)
{
return(WEIGHT_NIL_TO_NULLABLE);
}
if (isOptional)
{
return(WEIGHT_NIL_WITH_DEFAULT);
}
}
else
{
return(WEIGHT_NIL_TO_REFTYPE);
}
break;
case DataType.Boolean:
if (desiredType == typeof(bool))
{
return(WEIGHT_EXACT_MATCH);
}
if (stringSubType != StringConversions.StringSubtype.None)
{
return(WEIGHT_BOOL_TO_STRING);
}
break;
case DataType.Number:
if (Framework.Do.IsEnum(desiredType))
{ // number to enum conv
return(WEIGHT_NUMBER_TO_ENUM);
}
if (NumericConversions.NumericTypes.Contains(desiredType))
{
return(GetNumericTypeWeight(desiredType));
}
if (stringSubType != StringConversions.StringSubtype.None)
{
return(WEIGHT_NUMBER_TO_STRING);
}
break;
case DataType.String:
if (stringSubType == StringConversions.StringSubtype.String)
{
return(WEIGHT_EXACT_MATCH);
}
else if (stringSubType == StringConversions.StringSubtype.StringBuilder)
{
return(WEIGHT_STRING_TO_STRINGBUILDER);
}
else if (stringSubType == StringConversions.StringSubtype.Char)
{
return(WEIGHT_STRING_TO_CHAR);
}
break;
case DataType.Function:
if (desiredType == typeof(Closure))
{
return(WEIGHT_EXACT_MATCH);
}
else if (desiredType == typeof(ScriptFunctionDelegate))
{
return(WEIGHT_EXACT_MATCH);
}
break;
case DataType.ClrFunction:
if (desiredType == typeof(CallbackFunction))
{
return(WEIGHT_EXACT_MATCH);
}
else if (desiredType == typeof(Func <ScriptExecutionContext, CallbackArguments, DynValue>))
{
return(WEIGHT_EXACT_MATCH);
}
break;
case DataType.UserData:
if (value.UserData.Object != null)
{
var udObj = value.UserData.Object;
var udDesc = value.UserData.Descriptor;
if (udDesc.IsTypeCompatible(desiredType, udObj))
{
return(WEIGHT_EXACT_MATCH);
}
if (stringSubType != StringConversions.StringSubtype.None)
{
return(WEIGHT_USERDATA_TO_STRING);
}
}
break;
case DataType.Table:
if (desiredType == typeof(Table) || Framework.Do.IsAssignableFrom(desiredType, typeof(Table)))
{
return(WEIGHT_EXACT_MATCH);
}
else if (TableConversions.CanConvertTableToType(value.Table, desiredType))
{
return(WEIGHT_TABLE_CONVERSION);
}
break;
case DataType.Tuple:
break;
}
return(WEIGHT_NO_MATCH);
}
/// <summary>
/// Converts a DynValue to a CLR object of a specific type
/// </summary>
internal static object DynValueToObjectOfType(DynValue value, Type desiredType, object defaultValue, bool isOptional)
{
if (desiredType.IsByRef)
{
desiredType = desiredType.GetElementType();
}
var converter = Script.GlobalOptions.CustomConverters.GetScriptToClrCustomConversion(value.Type, desiredType);
if (converter != null)
{
var v = converter(value);
if (v != null)
{
return(v);
}
}
if (desiredType == typeof(DynValue))
{
return(value);
}
if (desiredType == typeof(object))
{
return(DynValueToObject(value));
}
StringConversions.StringSubtype stringSubType = StringConversions.GetStringSubtype(desiredType);
string str = null;
Type nt = Nullable.GetUnderlyingType(desiredType);
Type nullableType = null;
if (nt != null)
{
nullableType = desiredType;
desiredType = nt;
}
switch (value.Type)
{
case DataType.Void:
if (isOptional)
{
return(defaultValue);
}
else if ((!Framework.Do.IsValueType(desiredType)) || (nullableType != null))
{
return(null);
}
break;
case DataType.Nil:
if (Framework.Do.IsValueType(desiredType))
{
if (nullableType != null)
{
return(null);
}
if (isOptional)
{
return(defaultValue);
}
}
else
{
return(null);
}
break;
case DataType.Boolean:
if (desiredType == typeof(bool))
{
return(value.Boolean);
}
if (stringSubType != StringConversions.StringSubtype.None)
{
str = value.Boolean.ToString();
}
break;
case DataType.Number:
if (Framework.Do.IsEnum(desiredType))
{ // number to enum conv
Type underType = Enum.GetUnderlyingType(desiredType);
return(NumericConversions.FixToType(underType, value.Number));
}
if (NumericConversions.NumericTypes.Contains(desiredType))
{
return(NumericConversions.FixToType(desiredType, value.Number));
}
if (stringSubType != StringConversions.StringSubtype.None)
{
str = value.Number.ToString();
}
break;
case DataType.String:
if (stringSubType != StringConversions.StringSubtype.None)
{
str = value.String;
}
break;
case DataType.Function:
if (desiredType == typeof(Closure))
{
return(value.Function);
}
else if (desiredType == typeof(ScriptFunctionDelegate))
{
return(value.Function.GetDelegate());
}
break;
case DataType.ClrFunction:
if (desiredType == typeof(CallbackFunction))
{
return(value.Callback);
}
else if (desiredType == typeof(Func <ScriptExecutionContext, CallbackArguments, DynValue>))
{
return(value.Callback.ClrCallback);
}
break;
case DataType.UserData:
if (value.UserData.Object != null)
{
var udObj = value.UserData.Object;
var udDesc = value.UserData.Descriptor;
if (udDesc.IsTypeCompatible(desiredType, udObj))
{
return(udObj);
}
if (stringSubType != StringConversions.StringSubtype.None)
{
str = udDesc.AsString(udObj);
}
}
break;
case DataType.Table:
if (desiredType == typeof(Table) || Framework.Do.IsAssignableFrom(desiredType, typeof(Table)))
{
return(value.Table);
}
else
{
object o = TableConversions.ConvertTableToType(value.Table, desiredType);
if (o != null)
{
return(o);
}
}
break;
case DataType.Tuple:
break;
}
if (stringSubType != StringConversions.StringSubtype.None && str != null)
{
return(StringConversions.ConvertString(stringSubType, str, desiredType, value.Type));
}
throw ScriptRuntimeException.ConvertObjectFailed(value.Type, desiredType);
}
/// <summary>
/// Tries to convert a CLR object to a MoonSharp value, using more in-depth analysis
/// </summary>
internal static DynValue ObjectToDynValue(Script script, object obj)
{
DynValue v = TryObjectToSimpleDynValue(script, obj);
if (v != null)
{
return(v);
}
v = UserData.Create(obj);
if (v != null)
{
return(v);
}
if (obj is Type)
{
v = UserData.CreateStatic(obj as Type);
}
// unregistered enums go as integers
if (obj is Enum)
{
return(DynValue.NewNumber(NumericConversions.TypeToFix(Enum.GetUnderlyingType(obj.GetType()), obj)));
}
if (v != null)
{
return(v);
}
if (obj is Delegate)
{
return(DynValue.NewCallback(CallbackFunction.FromDelegate(script, (Delegate)obj)));
}
if (obj is MethodInfo)
{
MethodInfo mi = (MethodInfo)obj;
if (mi.IsStatic)
{
return(DynValue.NewCallback(CallbackFunction.FromMethodInfo(script, mi)));
}
}
if (obj is System.Collections.IList)
{
Table t = TableConversions.ConvertIListToTable(script, (System.Collections.IList)obj);
return(DynValue.NewTable(t));
}
if (obj is System.Collections.IDictionary)
{
Table t = TableConversions.ConvertIDictionaryToTable(script, (System.Collections.IDictionary)obj);
return(DynValue.NewTable(t));
}
var enumerator = EnumerationToDynValue(script, obj);
if (enumerator != null)
{
return(enumerator);
}
throw ScriptRuntimeException.ConvertObjectFailed(obj);
}