The whole boxes-and-glue model reminds of TeX. Sure, constraint-based layout models are nothing new, but here we've got some specific similarities: line-based p

The whole boxes-and-glue model reminds of TeX. Sure, constraint-based layout models are nothing new, but here we've got some specific similarities: line-based processing, optional arguments (H|V) in front, and especially priorities. Assigning priorities to different constraints is what allows TeX to degrade gracefully... before manifesting myriads of hard-to-trace bugs.