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<https://github.com/The-OpenROAD-Project/OpenLane/issues/1598|#1598 Enable set_io_pin_constraint to constrain ordering of pins>
Issue created by <https://github.com/oharboe|oharboe>
*Description*

I am trying to express a constraint on the ordering of pins using `set_io_pin_constraint`, but leave the actual position to be optimized.

*Proposal*

Idea on how to express ordering, add a parameter that respects the ordering of the pins in increasing x/y respectively.

```
set_io_pin_constraint -region up:* -pin_names foo -order
```
<https://github.com/The-OpenROAD-Project/OpenLane|The-OpenROAD-Project/OpenLane>