74 lines
2.1 KiB
Python
74 lines
2.1 KiB
Python
from smnp.ast.node.expression import MaxPrecedenceExpressionParser
|
|
from smnp.ast.node.model import Node
|
|
from smnp.ast.node.none import NoneNode
|
|
from smnp.ast.node.statement import StatementParser
|
|
from smnp.ast.parser import Parser
|
|
from smnp.token.type import TokenType
|
|
|
|
|
|
class IfElse(Node):
|
|
def __init__(self, pos):
|
|
super().__init__(pos)
|
|
self.children = [NoneNode(), NoneNode(), NoneNode()]
|
|
|
|
@property
|
|
def condition(self):
|
|
return self[0]
|
|
|
|
@condition.setter
|
|
def condition(self, value):
|
|
self[0] = value
|
|
|
|
@property
|
|
def ifNode(self):
|
|
return self[1]
|
|
|
|
@ifNode.setter
|
|
def ifNode(self, value):
|
|
self[1] = value
|
|
|
|
@property
|
|
def elseNode(self):
|
|
return self[2]
|
|
|
|
@elseNode.setter
|
|
def elseNode(self, value):
|
|
self[2] = value
|
|
|
|
@classmethod
|
|
def createNode(cls, ifNode, condition, elseNode=NoneNode()):
|
|
node = cls(ifNode.pos)
|
|
node.ifNode = ifNode
|
|
node.condition = condition
|
|
node.elseNode = elseNode
|
|
return node
|
|
|
|
|
|
def IfElseStatementParser(input):
|
|
ifStatementParser = Parser.allOf(
|
|
Parser.terminalParser(TokenType.IF),
|
|
Parser.terminalParser(TokenType.OPEN_PAREN),
|
|
MaxPrecedenceExpressionParser,
|
|
Parser.terminalParser(TokenType.CLOSE_PAREN),
|
|
StatementParser,
|
|
createNode=lambda _, __, condition, ___, ifStatement: IfElse.createNode(ifStatement, condition),
|
|
name="if statement"
|
|
)
|
|
|
|
ifElseStatementParser = Parser.allOf(
|
|
Parser.terminalParser(TokenType.IF),
|
|
Parser.terminalParser(TokenType.OPEN_PAREN),
|
|
MaxPrecedenceExpressionParser,
|
|
Parser.terminalParser(TokenType.CLOSE_PAREN),
|
|
StatementParser,
|
|
Parser.terminalParser(TokenType.ELSE),
|
|
StatementParser,
|
|
createNode=lambda _, __, condition, ___, ifStatement, ____, elseStatement: IfElse.createNode(ifStatement, condition, elseStatement),
|
|
name="if-else statement"
|
|
)
|
|
|
|
return Parser.oneOf(
|
|
ifElseStatementParser,
|
|
ifStatementParser,
|
|
name="if-else/if statement"
|
|
)(input) |