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