59 lines
1.4 KiB
Python
59 lines
1.4 KiB
Python
from smnp.ast.node.expression import ExpressionNode
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from smnp.ast.node.none import NoneNode
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from smnp.ast.parser import Parser
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from smnp.token.type import TokenType
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class RelationOperatorNode(ExpressionNode):
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def __init__(self, pos):
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super().__init__(pos)
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self.children = [ NoneNode(), NoneNode(), NoneNode()]
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@property
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def left(self):
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return self[0]
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@left.setter
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def left(self, value):
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self[0] = value
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@property
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def operator(self):
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return self[1]
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@operator.setter
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def operator(self, value):
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self[1] = value
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@property
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def right(self):
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return self[2]
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@right.setter
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def right(self, value):
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self[2] = value
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@classmethod
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def relationParser(cls):
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def createNode(left, operator, right):
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node = RelationOperatorNode(right.pos)
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node.left = left
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node.operator = operator
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node.right = right
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return node
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return Parser.leftAssociativeOperatorParser(
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cls._relationLhs(),
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TokenType.EQUAL,
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cls._relationRhs(),
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createNode=createNode
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)
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@classmethod
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def _relationLhs(cls):
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raise RuntimeError(f"_relationLhs() is not implemented in {cls.__name__} class")
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@staticmethod
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def _relationRhs():
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# TODO doAssert
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return ExpressionNode.parse |