ISTF validator #45
Description
At some point, we should start with validator, which will validate the ISTF array for correctness.
Use cases
- It will be needed to control the output from CSS parser or from a objects->istf transformer.
- It will ease the life of those who try to implement their own *-to-istf compiler and want to be sure they are doing it right.
- One could use it to validate a package installed from npm with istf inside and make sure the produced istf is correct.
Tasks
- Make sure validator knows all constraints we put into ISTF Reducing ISTF spec to a CSS subset for consistency #44
- Make sure it outputs meaningful error messages