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from enum import Enum
from symbol import LexToken, TablaLex, tokens
t_boolean = 'booleano'
t_break = 'detener'
t_char = 'caracter'
t_double = 'doble'
t_else = 'si no'
t_for = 'por cada'
t_ident = r'[a-zA-Z_][a-zA-Z0-9_]?'
t_if = 'si'
t_int = 'entero'
t_print = 'imprimir'
t_read = 'leer'
t_return = 'retorna'
t_string = 'cadena'
t_void = 'vacio'
t_while = 'mientras'
t_boolean_lit = r'verdadero|falso'
t_char_lit = r'\'[[:print:]]\''
t_double_lit = r'\d+.\d+'
t_int_lit = r'\d+'
t_string_lit = r'"[[:print]]*"'
def inicio_lexer(data):
tabla = TablaLex()
es_string = False
es_caracter = False
es_comentario = False
selector = ''
recol_string = ''
recol_caracter = ''
recol_comentario = ''
recol_operador = ''
for c in data + "\n":
print (c + ' (' + selector + ')')
if selector == '':
# Entradas a tokens
if c == '"':
selector = 'STRING_LIT'
continue
elif c == '\'':
selector = 'CHAR_LIT'
continue
elif c == '/':
recol_comentario = '/'
elif (c == '=' or c == '+' or c == '-' or c == '&' or c == '|') and len(recol_operador) == 0:
recol_operador = c
continue
elif c == '!' or c == '<' or c == '>':
recol_operador = c
continue
elif c == '{':
tabla.insertar(LexToken('{', None, None, 1))
elif c == '}':
tabla.insertar(LexToken('}', None, None, 1))
elif c == '(':
tabla.insertar(LexToken('(', None, None, 1))
elif c == ')':
tabla.insertar(LexToken(')', None, None, 1))
elif c == ',':
tabla.insertar(LexToken(',', None, None, 1))
elif c == ';':
tabla.insertar(LexToken(';', None, None, 1))
elif c == '*':
tabla.insertar(LexToken('*', None, None, 1))
# Apertura de comentario
if recol_comentario == '/' and c == '*':
selector = 'COMMENT'
recol_comentario = ''
continue
# Apertura de operador compuesto
if len(recol_operador) > 0:
rc = recol_operador + c
if (rc == '>=' or rc == '<=' or rc == '==' or rc == '!=' or
rc == '&&' or rc == '||' or rc == '++' or rc == '--'):
# Operador compuesto
tabla.insertar(LexToken(rc, None, None, 1))
recol_operador = ''
continue
else:
# Operador simple
tabla.insertar(LexToken(recol_operador, None, None, 1))
recol_operador = ''
# Cadenas de texto
if selector == 'STRING_LIT':
if c == '"':
tabla.insertar(LexToken('STRING_LIT', None, recol_string, 1))
selector = ''
recol_string = ''
else:
recol_string += c
continue
# Caracteres
if selector == 'CHAR_LIT':
if len(recol_caracter) > 1:
print ('Error: más de un caracter en una literal de caracter')
break
if c == '\'':
if len(recol_caracter) == 0:
print ('Error: literal de caracter vacía')
break
tabla.insertar(LexToken('CHAR_LIT', None, recol_caracter, 1))
selector = ''
recol_caracter = ''
continue
else:
recol_caracter += c
# Comentarios
if selector == 'COMMENT':
if c == '*':
recol_comentario = c
continue
elif recol_comentario == '*':
if c == '/':
selector = ''
recol_comentario = ''
continue
else:
recol_comentario = ''
continue
print (str(tabla))
'''
tabla = TablaLex()
# booleano ivan = verdadero
tabla.insertar(LexToken('BOOLEAN', None, None, 1))
tabla.insertar(LexToken('IDENT', 'ivan', None, 1))
tabla.insertar(LexToken('=', None, None, 1))
tabla.insertar(LexToken('BOOLEAN_LIT', None, True, 1))
print (str(tabla))
ident = tabla.buscar('ivan')
print (str(ident))
ident.valor = True
tabla.actualizar('ivan', ident)
ident = tabla.buscar('ivan')
print (str(ident))
'''
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