How can I assign sequences to constants in the CONSTANTS section of a TLA+ configuration file?

Question

I've tried

CONSTANTS seq = <<5,6,7>>

but TLC gives me a syntax error:

Error: TLC found an error in the configuration file at line 1. It was expecting = or <- and didn't find it.

I've also tried to include the Sequences module in the configuration file, to no avail.

So... what do I have to do to assign a sequence?

Answer 1

I don't remember ever facing this problem and my TLC is too rusty to try and give you a first hand answer (I just restarted using the TLA+ toolbox).

From the post linked bellow, however, I figure that you can't instantiate constants with sequences through the TLC config files.

http://bbpress.tlaplus.net/topic/creating-a-sequence-from-a-set

Even though the question is old, leaving an answer may help future TLAers.

Answer 2

You can't directly assign to a constant in the TLA+ file. If you're using the toolbox, write CONSTANTS seq, then in the model add the tuple you want as an ordinary assignment.