sequence diagram message arrows

Question

Hi,

I tested the message arrows in the .
Under some conditions, it became a line different from my expectations.

@startuml
Bob_x x-> Alice : 0-4 x->
Bob_x x->x Alice_x : 0-6 x->x
Bob_x x->o Alice_o : 0-8 x->o
@enduml

Maybe else...

• Result

• allowsTest.bat script

See http://kn1661nk.blogspot.com/2019/05/test-message-arrow-of-plantuml-sequence.html

• Command line

allowsTest.bat 0

• Version

>java -jar plantuml.jar -v
(0.000 - 15 Mo) 12 Mo - PlantUML Version 1.2019.04
(0.016 - 15 Mo) 12 Mo - GraphicsEnvironment.isHeadless() false
(0.016 - 15 Mo) 12 Mo - Found 0 files
No diagram found

>

Thak you.

Comments

* Command line
>allowsTest.bat 2

* Result
https://4.bp.blogspot.com/-Kx8ieU4V2pU/XNC8qNzhOeI/AAAAAAAACLM/otZL0z3ii6crMYNEbA9EyOynTXbFzsTHQCLcBGAs/s1600/allows-2.sd.png

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I understand that in UML, x can only be attached to the end of the arrow.
In such a case, what should we do as PlantUML?
It is troublesome to keep up with changes in the UML specification, so I think that you may draw according to the instructions in the definition file.

Thank you.

Answer 1

Hi,

as mentioned here http://plantuml.com/en/sequence-diagram in section "Change arrow style":

• Add a final x to denote a lost message.

Thus a start with x is not allowed...

Answer 2

Thanks again for the feedback.

This should be fixed in last beta http://beta.plantuml.net/plantuml.jar

Best regards,

Comments

I tried beta. This problem has been resolved.

Is this another ploblem?

@startuml
participant Bob_x
participant Bob_o
participant Bob
participant Alice
participant Alice_o
participant Alice_x

Bob -\ Alice : 0-0 -\
Bob_o o-\ Alice : 0-1 o-\
Bob -\o Alice_o : 0-2 -\o
Bob_o o-\o Alice_o : 0-3 o-\o
Bob_x x-\ Alice : 0-4 x-\
Bob -\x Alice_x : 0-5 -\x
|||
Bob \-\ Alice : 2-0 \-\
Bob_o o\-\ Alice : 2-1 o\-\
Bob \-\o Alice_o : 2-2 \-\o
Bob_o o\-\o Alice_o : 2-3 o\-\o
Bob_x x\-\ Alice : 2-4 x\-\
Bob \-\x Alice_x : 2-5 \-\x
@enduml

Thank you for your quick response.

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Lines that end with \ are concatened with the following one.
So you should not let your lines end with \ and put some space after.

http://www.plantuml.com/plantuml/uml/PP51oeCm48NtSugvWA3nT_ElRCyHADQw25WZRGfPvF2TJ3gGqPNCz_6U3pA-m_GAd-SAEttTxFPf2tZrzriy4NyawhwiRbxEH5AAHG2AOsFBZV_ODcq-WV-3NfcExr_2Ioqhauc4Zh9dn3PYL9L_-PRAAAjO3Pb0IecjhMA6Djfgf7PT0IMbff0qZAgWrdrXCbKNqzQgk5vBSc04ux8zw16_

Hope this helps!

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Wow! That's right.
Thank you!

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How can I close this ticket?
There is no check mark for closing. . .

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Usually, we change the category of the question to "closed bug" by editing the question (and then changing the category). We've just did it.
Thanks!