"Structural pattern matching" for Python, part 2 [LWN.net]

"Structural pattern matching" for Python, part 2

Posted Sep 6, 2020 11:35 UTC (Sun) by kleptog (subscriber, #1183)
In reply to: "Structural pattern matching" for Python, part 2 by ecree
Parent article: "Structural pattern matching" for Python, part 2

An alternative to algebraic pattern matching is allowing extra conditional, like in elixir (which also offers algebraic matching). Then it could look like:

match size:
    case (x,y) if x == y:
        circle()
    case (x,y):
        ellipse()

The whole power of such a match statement is that you can match entire nested structures, which this PEP does offer. An optional extra if clause for the more fancy cases can help here.

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