On 24/11/20 9:44 am, David Mertz wrote:
m = Matcher(arbitrary_expression)
if m.case("StringNode(s)"):
process_string(m.val)
elif m.case("[a, 5, 6, b]"):
process_two_free_vars(*m.values)
elif m.case("PairNone(a, b)"):
a, b = m.values
process_pair(a, b)
elif m.case("DictNode"):
foo = {key, process_node(child_node) for key, child_node in
m.values.items()}
How does the Matcher object know the meanings of "StringNode",
"PairNode", etc.? Presumably they're bound to classes in the
namespace of the caller, but the Matcher doesn't know anything
about that namespace.
--
Greg
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