131 lines
3.6 KiB
Python
131 lines
3.6 KiB
Python
from smnp.ast.node.expression import ExpressionNode
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from smnp.ast.node.ignore import IgnoredNode
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from smnp.ast.node.model import Node, ParseResult
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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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def abstractIterableParser(iterableNodeType, openTokenType, closeTokenType, itemParser):
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class AbstractIterableTailNode(ExpressionNode):
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def __init__(self, pos):
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super().__init__(pos)
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self.children.append(NoneNode())
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@property
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def next(self):
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return self[1]
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@next.setter
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def next(self, value):
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self[1] = value
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@classmethod
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def _parse(cls, input):
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return Parser.oneOf(
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AbstractIterableTailNode._parser1(),
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AbstractIterableTailNode._parser2(),
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)(input)
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@staticmethod
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def _parser1():
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return Parser.terminalParser(closeTokenType)
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@staticmethod
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def _parser2():
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def createNode(comma, expr, iterableTail):
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node = AbstractIterableTailNode(expr.pos)
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node.value = expr
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node.next = iterableTail
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return node
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return Parser.allOf(
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Parser.terminalParser(TokenType.COMMA, doAssert=True),
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itemParser,
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AbstractIterableTailNode.parse,
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createNode=createNode
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)
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class AbstractIterableNode(ExpressionNode):
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def __init__(self, pos):
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super().__init__(pos)
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self.children.append(NoneNode())
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@property
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def next(self):
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return self[1]
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@next.setter
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def next(self, value):
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self[1] = value
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@classmethod
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def _parse(cls, input):
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return Parser.oneOf(
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AbstractIterableNode._parser1(),
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AbstractIterableNode._parser2()
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)(input)
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@staticmethod
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def _parser1():
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def emptyIterable(openToken, closeToken):
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node = AbstractIterableNode(openToken.pos)
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node.value = openToken
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node.next = closeToken
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return node
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return Parser.allOf(
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Parser.terminalParser(openTokenType),
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Parser.terminalParser(closeTokenType),
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createNode=emptyIterable
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)
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@staticmethod
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def _parser2():
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def createNode(openParen, expr, iterableTail):
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node = AbstractIterableNode(openParen.pos)
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node.value = expr
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node.next = iterableTail
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return node
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return Parser.allOf(
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Parser.terminalParser(openTokenType, lambda val, pos: Node(pos)),
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itemParser,
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AbstractIterableTailNode.parse,
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createNode=createNode
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)
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return toFlatDesiredNode(iterableNodeType, AbstractIterableNode.parse)
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def toFlatDesiredNode(iterableNodeType, parser):
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def parse(input):
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result = parser(input)
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if result.result:
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value = flattenList(result.node)
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node = iterableNodeType(result.node.pos)
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node.children.clear()
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for v in value:
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node.append(v)
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return ParseResult.OK(node)
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return ParseResult.FAIL()
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return parse
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def flattenList(node, output=None):
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if output is None:
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output = []
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if type(node.value) != IgnoredNode:
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output.append(node.value)
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if type(node.next) != IgnoredNode:
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flattenList(node.next, output)
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return output
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