Add expression-evaluator: DAGs & state machines tutorial project

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Educational calculator teaching FSMs (explicit transition table tokenizer)
and DAGs (recursive descent parser with AST evaluation). Includes CLI with
REPL, graphviz visualization, and 61 tests.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

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dl92

2026-02-08 18:09:42 +00:00

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python/expression-evaluator/tests/__init__.py Normal file