def teardown(self, g: grammar.Grammar):
"""We have introduced new nodes, so we need
to recalculate min tokens.
FIXME: Increasingly min tokens looks like it shouldn't
be part of initial grammar creation.
"""
g._calc_min_tokens()
g._calc_pot_tokens()
def teardown(self, g: grammar.Grammar):
"""Prune orphan symbols"""
# Cannot remove start symbol!
self.unit_symbols.discard(g.start)
symbols = list(g.symbols.keys())
for name in symbols:
if g.symbols[name] in self.unit_symbols:
del g.symbols[name]
g._calc_min_tokens()
g._calc_pot_tokens()