def assignmentStatement(node):
"""
assignmentStatement = variable "=" expression ";".
"""
identifierNode = Node(token)
consume(IDENTIFIER)
operatorNode = Node(token)
consume("=")
node.addNode(operatorNode)
operatorNode.addNode(identifierNode)
expression(operatorNode)
consume(";")
def printStatement(node):
"""
printStatement = "print" expression ";".
"""
statementNode = Node(token)
consume("print")
node.addNode(statementNode)
expression(statementNode)
consume(";")
def program():
"""
program = statement {statement} EOF.
"""
global ast
node = Node()
statement(node)
while not found(EOF):
statement(node)
consume(EOF)
ast = node
