import sys
from Mparser import parser
from scanner import lexer as scanner
from TreePrinter import TreePrinter
from TypeChecker import NodeVisitor
if __name__ == '__main__':
try:
filename = sys.argv[1] if len(sys.argv) > 1 else "example3.m"
file = open(filename, "r")
except IOError:
print("Cannot open {0} file".format(filename))
sys.exit(0)
text = file.read()
ast = parser.parse(text, lexer=scanner)
visitor = NodeVisitor()
visitor.visit(ast)
