def compileLine(visitor, line):
lexer = ExprLexer(InputStream(line))
token_stream = CommonTokenStream(lexer)
parser = ExprParser(token_stream)
tree = parser.root()
return visitor.visit(tree)
import sys
from antlr4 import *
from ExprLexer import ExprLexer
from ExprParser import ExprParser
input_stream = InputStream(input('? ')) # solicitar una linea
# input_stream = StdinStream() # stdin
# input_stream = FileStream(sys.argv[1]) # archivo por parametro
# input_stream = FileStream(sys.argv[1], encoding='utf-8') # archivo con acentos
lexer = ExprLexer(input_stream)
token_stream = CommonTokenStream(lexer)
parser = ExprParser(token_stream)
tree = parser.root()
print(tree.toStringTree(recog=parser))
