31 lines
953 B
Python
31 lines
953 B
Python
from smnp.error.runtime import RuntimeException
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from smnp.runtime.evaluator import Evaluator, evaluate
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from smnp.type.model import Type
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class MinusEvaluator(Evaluator):
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@classmethod
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def evaluator(cls, node, environment):
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value = evaluate(node.value, environment).value
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try:
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return {
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Type.INTEGER: cls.evaluateForInteger,
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Type.STRING: cls.evaluateForString,
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Type.LIST: cls.evaluateForList
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}[value.type](value.value)
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except KeyError:
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raise RuntimeException(f"Type {value.type.name.lower()} does not support '{node.operator.value}' operator", node.pos)
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@classmethod
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def evaluateForInteger(cls, value):
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return Type.integer(-value)
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@classmethod
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def evaluateForString(cls, value):
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return Type.string(value[::-1])
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@classmethod
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def evaluateForList(cls, value):
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return Type.list(value[::-1]) |