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The bottom up order is the right one. The classic paper: An Incremental Approach to Compiler Construction (Abdulaziz Ghuloum) https://www.google.com/url?sa=t&r

• Mathnerd314 6y ago
  They link this paper in the bottom of the article as a different approach from the one they're using.
• tom_mellior 6y ago
  That's not really the same approach. It's not "backward", it's more "sideways": It starts with an end-to-end compiler for a tiny language, then builds out that end-to-end compiler incrementally. The featured article describes an approach where no such end-to-end compiler is available from the beginning. It's only end-to-end after the final exercise.