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Order of members of type in a template [message #1721714]

Fri, 29 January 2016 11:49

murli sharma

Messages: 85
Registered: November 2015

Member

Hi,

Is it neccesary for the order of types initialized in a template to be same as in the definition?
For example for the following type:

type record Details {
        integer n1 optional,
        integer n2
}

Can't we define a template with order of the members changed as:

template Details fill_details := {
        n2 := 2,
        n1 := 1
}

Thanks
Murli

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Re: Order of members of type in a template [message #1721716 is a reply to message #1721714]

Fri, 29 January 2016 12:00

Elemer Lelik

Messages: 1120
Registered: January 2015

Senior Member

Hi Murli,

I'm pretty sure this is not permitted by the standard for a record.

Best regards

Elemer

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Re: Order of members of type in a template [message #1726659 is a reply to message #1721716]

Tue, 15 March 2016 11:43

murli sharma

Messages: 85
Registered: November 2015

Member

Hi Elemer,

We've got some TTCN-3 Scripts from one vendor.
In these scripts, the order of members initialized in templates is different from what is defined in corresponding ASN types.
We said them that this is not as per TTCN-3 spec (as mentioned by you) and asked them to fix it but they say that there is no such restriction and this is legal according to TTCN-3 spec.
I couldn't find a reference about it in the TTCN-3 spec to give to the vender. Can you please help me with this.

Thanks
Murli

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Re: Order of members of type in a template [message #1726661 is a reply to message #1726659]

Tue, 15 March 2016 12:32

Elemer Lelik

Messages: 1120
Registered: January 2015

Senior Member

Hi Murli,

please see

The Testing and Test Control Notation version 3;
Part 7: Using ASN.1 with TTCN-3

11 Defining ASN.1 message templates

11.3 Ordering of template fields
When TTCN-3 templates are used for ASN.1 types the significance of the order of the fields in the template will depend on the type of ASN.1 construct used to define the message type. For example: if SEQUENCE or SEQUENCE OF is used
then the message fields shall be sent or matched in the order specified in the template. If SET or SET OF is used then the message fields may be sent or matched in any order.

I think this is quite straightforward.

Best regards
Elemer

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