Aa Puntambekar Pdf 71 2021 — Compiler Design Book Of

return Token(EOF, None)

# Example usage lexer = Lexer('2 + 3') token = lexer.get_next_token()

def integer(self): result = '' while self.current_char is not None and self.current_char.isdigit(): result += self.current_char self.advance() return int(result) compiler design book of aa puntambekar pdf 71 2021

if self.current_char == '+': self.advance() return Token(PLUS, '+')

while token.type != EOF: print(token) token = lexer.get_next_token() To get more information you may have to download and read the book with detailed explnation and examples return Token(EOF, None) # Example usage lexer =

import re

# Lexer class class Lexer: def __init__(self, text): self.text = text self.pos = 0 self.current_char = self.text[self.pos] compiler design book of aa puntambekar pdf 71 2021

if self.current_char.isdigit(): return Token(INTEGER, self.integer())