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TTCN-3 record with a field of type "port" [message #1848441]

Thu, 02 December 2021 08:43

Yann Garcia

Messages: 145
Registered: June 2016

Senior Member

Hello All,

I have the following TTCN-3 data structure

	type port MyPort  message {
		in 
			MsgIn;
		out 
			MsgOut;
	};
	type record Interface {
		MyPort myPort,
		charstring myHost,
		charstring myProtocolBinding,
		charstring mySerialization
	}

While compiling the code, I got the following error:

Port type `@OneM2M_Ports.OneM2MPort' cannot be embedded into another type

But, according to the TTCN-3 Core Language standard, this kind of data structure is authorized.

Is it a limitation of TITAN? Is there a work-around to address it?

Many thanks for your support,

BR\Yann

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Re: TTCN-3 record with a field of type "port" [message #1848475 is a reply to message #1848441]

Fri, 03 December 2021 11:57

Lenard Nagy

Messages: 54
Registered: September 2016

Member

Hi Yann,

Though the standard states that "The fields of a record type may be of any TTCN-3 type" the BNF of the Type (which is the definition of field type for records) does not allow port type as a field of a record:

404.Type ::= PredefinedType | ReferencedType
405.PredefinedType ::= BitStringKeyword |
BooleanKeyword |
CharStringKeyword |
UniversalCharString |
IntegerKeyword |
OctetStringKeyword |
HexStringKeyword |
VerdictTypeKeyword |
FloatKeyword |
AddressKeyword |
DefaultKeyword |
AnyTypeKeyword |
TimerKeyword

I have the following questions:
1: Is there something in the standard that we might have missed and port should be allowed here?
2: Could You please explain why You would need a port to be inserted in a record? We might suggest an alternative solution.

Lenard

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Re: TTCN-3 record with a field of type "port" [message #1848576 is a reply to message #1848475]

Wed, 08 December 2021 12:47

Yann Garcia

Messages: 145
Registered: June 2016

Senior Member

Hello Lenard,

Thanks a lot for your feedback.

This is about oneM2M Conformance test suite.
We have several network interface (mcc, mca...). To prevent a lot of test in send/receive functions, a component variable was created (with the type record), containing the port, the binding, the serialization and so on.
Initially, this test suite was develop with TTworkbench and I'm trying to compile it with TITAN.

Regarding the TTCN-3 type, you're right, so I have to find another way to go.

Many thanks again for your help,

BR\Yann

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