OSF DCE Problem Determination Guide

Action: Provide a <kw>([switch_is]) clause that speciﬁes a ﬁeld or parameter that is the

union discriminator, or use an encapsulated union, where the union discriminator variable

is encapsulated as a ﬁeld within the union type.

0x13283121 NIDL_NEUSWPTR

Severity: Varies Component: idl

Text: The union switch variable %1$s cannot be a [ptr] or [unique] pointer

Explanation: A <kw>([switch_is]) attribute clause in the source IDL speciﬁes its value

by dereferencing a pointer ﬁeld or parameter. This is invalid if the pointer variable has

either of the <kw>([ptr]) or <kw>([unique]) attributes, since both allow the pointer to be

<kw>(NULL). If the pointer were <kw>(NULL), there would be no way to determine the

union discriminator.

Action: Either redeclare the <kw>([switch_is]) variable to be a scalar rather than a

pointer, or change the <kw>([switch_is]) variable to be a <kw>([ref]) pointer.

0x13283122 NIDL_NEUSWTYPE

Severity: Varies Component: idl

Text: A nonencapsulated union type must have a [switch_type] attribute

Explanation: A <kw>([switch_type]) attribute is required on a deﬁnition of a

nonencapsulated union type to identify the data type of the union discriminator.

Action: Provide a <kw>([switch_type]) clause that speciﬁes a valid union discriminator

data type.

0x13283123 NIDL_NEUXMITAS

Severity: Varies Component: idl

Text: A [transmit_as] type cannot be a nonencapsulated union

Explanation: A type referenced in a <kw>([transmit_as]) clause cannot be a

nonencapsulated union, since there is no deﬁned way to communicate the union

discriminator to/from <kw>([transmit_as]) data translation routines.

Action: Use an encapsulated union for the transmissible type.

0x13283124 NIDL_NEUXMITYPE

Severity: Varies Component: idl

Text: A nonencapsulated union cannot have a [transmit_as] type

Explanation: A nonencapsulated union type cannot be deﬁned to have a transmissible

type, since there is no deﬁned way to communicate the union discriminator to/from

<kw>([transmit_as]) data translation routines.

Action: Use an encapsulated union, or reconsider the need for a different transmissible

type for the union.

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