Issue 2207:  Need more info for custom marshalled value in C++ (cxx_revision)
Source:  (, )
Nature:  Uncategorized Issue
Severity: 
Summary: Summary: The current C++ chapter for custom marshalled values on p. 20-94 lacks
 information about how one implements a custom value.
 The "Value Type Semantics" chapter in "ptc/98-10-06, 15 Oct. 98[REVIEW]"
 p. 5-11 says,
     " The implementer of a custom value type shall provide an
     implementation of the CustomMarshaller operations. The manner
     in which this [sic] done shall be specified for each language mapping..."
 

Resolution: 
Revised Text: 
Actions taken:
November 12, 1998: received issue
Discussion: 
deferred in June 2011 to the next RTF
End of Annotations:=====
Return-Path: <mcheng@us.ibm.com>
From: Michael Cheng <mcheng@us.ibm.com>
To: <issues@omg.org>
Cc: <nash@hursley.ibm.com>, Kim Rochat <krochat@us.ibm.com>
Subject: Need more info for custom marshalled value in C++
Date: Thu, 12 Nov 1998 17:54:22 -0500

The current C++ chapter for custom marshalled values on p. 20-94 lacks
information about how one implements a custom value.
The "Value Type Semantics" chapter in "ptc/98-10-06, 15
Oct. 98[REVIEW]"
p. 5-11 says,
    " The implementer of a custom value type shall provide an
    implementation of the CustomMarshaller operations. The manner
    in which this [sic] done shall be specified for each language
mapping..."

    Since register_streaming_policy, lookup_streaming_policy, and
unregister_streaming_policy have  disappeared from  chapter 5, the
information
we need for C++ are:
 -- How/where a user implements marshal() and unmarshal(). This could
be as
    simple as having the implementation inherit the CustomMashaller
interface,
    but something should be said about it.
 -- How the implementations of  DataInputStream/DataOutputStream  know
that a
 value is custom in read_value()/write_value(). Or does it not need to
know
this information?

Michael Cheng
mcheng@us.ibm.com