def apply(self, expr, rules, evaluation):
'Switch[expr_, rules___]'
rules = rules.get_sequence()
if len(rules) % 2 != 0:
evaluation.message('Switch', 'argct', 'Switch', len(rules) + 1)
return
for pattern, value in zip(rules[::2], rules[1::2]):
if match(expr, pattern, evaluation):
return value.evaluate(evaluation)
def apply(self, expr, rules, evaluation):
'Switch[expr_, rules___]'
rules = rules.get_sequence()
if len(rules) % 2 != 0:
evaluation.message('Switch', 'argct', 'Switch', len(rules) + 1)
return
for pattern, value in zip(rules[::2], rules[1::2]):
if match(expr, pattern, evaluation):
return value.evaluate(evaluation)
