53 lines
2.1 KiB
Python
53 lines
2.1 KiB
Python
from smnp.error.runtime import RuntimeException
|
|
from smnp.runtime.evaluator import Evaluator
|
|
from smnp.runtime.evaluators.expression import expressionEvaluator
|
|
from smnp.type.model import Type
|
|
|
|
|
|
class RelationEvaluator(Evaluator):
|
|
|
|
@classmethod
|
|
def evaluator(cls, node, environment):
|
|
left = expressionEvaluator(doAssert=True)(node.left, environment).value
|
|
right = expressionEvaluator(doAssert=True)(node.right, environment).value
|
|
|
|
if node.operator.value == "==":
|
|
return cls.equalOperatorEvaluator(left, node.operator, right)
|
|
|
|
if node.operator.value == "!=":
|
|
return cls.notEqualOperatorEvaluator(left, node.operator, right)
|
|
|
|
return cls.otherRelationOperatorsEvaluator(left, node.operator, right)
|
|
|
|
@classmethod
|
|
def equalOperatorEvaluator(cls, left, operator, right):
|
|
if left.type in [Type.INTEGER, Type.FLOAT] and right.type in [Type.INTEGER, Type.FLOAT]:
|
|
return Type.bool(left.value == right.value)
|
|
|
|
return Type.bool(left.type == right.type and left.value == right.value)
|
|
|
|
@classmethod
|
|
def notEqualOperatorEvaluator(cls, left, operator, right):
|
|
if left.type in [Type.INTEGER, Type.FLOAT] and right.type in [Type.INTEGER, Type.FLOAT]:
|
|
return Type.bool(left.value != right.value)
|
|
|
|
return Type.bool(left.type != right.type or left.value != right.value)
|
|
|
|
@classmethod
|
|
def otherRelationOperatorsEvaluator(cls, left, operator, right):
|
|
if left.type in [Type.INTEGER, Type.FLOAT] and right.type in [Type.INTEGER, Type.FLOAT]:
|
|
if operator.value == ">":
|
|
return Type.bool(left.value > right.value)
|
|
|
|
if operator.value == ">=":
|
|
return Type.bool(left.value >= right.value)
|
|
|
|
if operator.value == "<":
|
|
return Type.bool(left.value < right.value)
|
|
|
|
if operator.value == "<=":
|
|
return Type.bool(left.value <= right.value)
|
|
|
|
raise RuntimeException(f"Operator {operator.value} is not supported by {left.type.name.lower()} and {right.type.name.lower()} types", operator.pos)
|
|
|