private AggCastResult bindExplicitConversionToEnum(AggregateType aggTypeDest)
{
Debug.Assert(_typeSrc != null);
Debug.Assert(aggTypeDest != null);
AggregateSymbol aggDest = aggTypeDest.getAggregate();
if (!aggDest.IsEnum())
{
return(AggCastResult.Failure);
}
if (_typeSrc.isPredefType(PredefinedType.PT_DECIMAL))
{
return(bindExplicitConversionFromDecimalToEnum(aggTypeDest));
}
if (_typeSrc.isNumericType() || (_typeSrc.isPredefined() && _typeSrc.getPredefType() == PredefinedType.PT_CHAR))
{
// Transform constant to constant.
if (_exprSrc.GetConst() != null)
{
ConstCastResult result = _binder.bindConstantCast(_exprSrc, _exprTypeDest, _needsExprDest, out _exprDest, true);
if (result == ConstCastResult.Success)
{
return(AggCastResult.Success);
}
if (result == ConstCastResult.CheckFailure)
{
return(AggCastResult.Abort);
}
}
if (_needsExprDest)
{
_binder.bindSimpleCast(_exprSrc, _exprTypeDest, out _exprDest);
}
return(AggCastResult.Success);
}
else if (_typeSrc.isPredefined() &&
(_typeSrc.isPredefType(PredefinedType.PT_OBJECT) || _typeSrc.isPredefType(PredefinedType.PT_VALUE) || _typeSrc.isPredefType(PredefinedType.PT_ENUM)))
{
if (_needsExprDest)
{
_binder.bindSimpleCast(_exprSrc, _exprTypeDest, out _exprDest, EXPRFLAG.EXF_UNBOX);
}
return(AggCastResult.Success);
}
return(AggCastResult.Failure);
}