script_exam.py

from antlr4 import InputStream, FileStream, CommonTokenStream
from gen.ExamenLexer import ExamenLexer
from gen.ExamenParser import ExamenParser

# Entrada del usuario
user_input = FileStream("archivo.txt")

# Crear el lexer
lexer = ExamenLexer(user_input)

# Obtener los tokens
tokens = CommonTokenStream(lexer)
tokens.fill()

# Imprimir los tokens
print("\nTOKENS:\n")
for token in tokens.tokens:
    if token.type != -1:  
        token_type = lexer.symbolicNames[token.type]
        print(f"token: {token.text}, tipo: {token_type}")
#for token in lexer.getAllTokens():
#    print(f"token: {token.text}, tipo: {lexer.symbolicNames[token.type]}")


# Generar el AST
parser = ExamenParser(tokens)
tree = parser.source() 
print("\nAST:\n")
print(tree.toStringTree(recog=parser))