public virtual void VisitUnaryExpression(BoundUnaryEx x)
{
Accept(x.Operand);
}
public virtual TResult VisitUnaryExpression(BoundUnaryEx x) => DefaultVisitOperation(x);
protected virtual void Visit(BoundUnaryEx x, ConditionBranch branch)
{
base.VisitUnaryExpression(x);
}
public sealed override void VisitUnaryExpression(BoundUnaryEx x) => Visit(x, ConditionBranch.Default);
public virtual void VisitUnaryExpression(BoundUnaryEx x)
{
Accept(x.Operand);
}
TypeRefMask ResolveUnaryOperatorExpression(BoundUnaryEx x, ConditionBranch branch)
{
//
Accept(x.Operand);
//
switch (x.Operation)
{
case Operations.AtSign:
return x.Operand.TypeRefMask;
case Operations.BitNegation:
return TypeCtx.GetLongTypeMask(); // TODO: or byte[]
case Operations.Clone:
return x.Operand.TypeRefMask;
case Operations.LogicNegation:
return TypeCtx.GetBooleanTypeMask();
case Operations.Minus:
if (IsDoubleOnly(x.Operand))
return TypeCtx.GetDoubleTypeMask(); // double in case operand is double
return TypeCtx.GetNumberTypeMask(); // TODO: long in case operand is not a number
case Operations.ObjectCast:
if (IsClassOnly(x.Operand.TypeRefMask))
return x.Operand.TypeRefMask; // (object)<object>
return TypeCtx.GetSystemObjectTypeMask(); // TODO: return the exact type in case we know, return stdClass in case of a scalar
case Operations.Plus:
if (IsNumberOnly(x.Operand.TypeRefMask))
return x.Operand.TypeRefMask;
return TypeCtx.GetNumberTypeMask();
case Operations.Print:
return TypeCtx.GetLongTypeMask();
case Operations.BoolCast:
return TypeCtx.GetBooleanTypeMask();
case Operations.Int8Cast:
case Operations.Int16Cast:
case Operations.Int32Cast:
case Operations.UInt8Cast:
case Operations.UInt16Cast:
// -->
case Operations.UInt64Cast:
case Operations.UInt32Cast:
case Operations.Int64Cast:
return TypeCtx.GetLongTypeMask();
case Operations.DecimalCast:
case Operations.DoubleCast:
case Operations.FloatCast:
return TypeCtx.GetDoubleTypeMask();
case Operations.UnicodeCast: // TODO
case Operations.StringCast:
return TypeCtx.GetStringTypeMask(); // binary | unicode | both
case Operations.BinaryCast:
return TypeCtx.GetWritableStringTypeMask(); // binary string builder
case Operations.ArrayCast:
return TypeCtx.GetArrayTypeMask(); // TODO: can we be more specific?
case Operations.UnsetCast:
return TypeCtx.GetNullTypeMask(); // null
default:
throw ExceptionUtilities.Unreachable;
}
}
protected override void Visit(BoundUnaryEx x, ConditionBranch branch)
{
x.TypeRefMask = ResolveUnaryOperatorExpression(x, branch);
}
