14 lines
612 B
Markdown
14 lines
612 B
Markdown
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# Hydra; a multi-headed Python-on-Python interpreter.
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Hydra draws extensively the OCaml and Scheme prior art for coroutine based
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interpreters to produce a Python interpreter along the same lines.
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At the top of the interpreter we see an extensible `while` loop. The interpreter
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performs one "step" - evaluating a single statement - producing a new state and
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a "next PC"; a path into the AST identifying the next statement to be executed.
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This model enables single stepping, stack analysis and most importantly
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interruptions as for snapshotting or suspending.
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Hydra is the basis for the Flowmetal interpreter.
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