diff options
Diffstat (limited to 'lexer.py')
| -rw-r--r-- | lexer.py | 45 |
1 files changed, 23 insertions, 22 deletions
@@ -1,10 +1,13 @@ from enum import Enum -from symbol import LexToken, TablaLex, tokens +from tabla import LexToken, TablaLex, tokens +from parser import Parser +from shared import Control op_compuestos = ['>=', '<=', '==', '!=', '&&', '||', '++', '--'] op_simples_a = ['=', '+', '-', '&', '|'] # pueden ir al final del op compuesto op_simples_b = ['!', '<', '>'] # solo pueden ir al inicio del op compuesto op_simples = op_simples_a + op_simples_b +otros_tokens = ['{', '}', '(', ')', ',', '.', ';'] reservadas = { 'booleano': 'BOOLEAN', 'detener': 'BREAK', @@ -29,24 +32,21 @@ class Selector(Enum): COMMENT = 4 ENTERO = 5 -class Control(Enum): - SIGUIENTE = 0 - REPETIR = 1 - ERROR = 2 - class Lexer: - tabla = TablaLex() - numlinea = 1 - selector = Selector.NINGUNO - recol_string = '' - recol_caracter = '' - recol_comentario = '' - recol_operador = '' - recol_ident = '' - recol_entero = '' - - def inicio_lexer(self, data): - for l in data.splitlines(): + def __init__(self, data): + self.tabla = TablaLex() + self.numlinea = 1 + self.selector = Selector.NINGUNO + self.recol_string = '' + self.recol_caracter = '' + self.recol_comentario = '' + self.recol_operador = '' + self.recol_ident = '' + self.recol_entero = '' + self.data = data + + def inicio(self): + for l in self.data.splitlines(): for c in l + "\n": r = self.procesar(c) if r == 2: return @@ -57,10 +57,12 @@ class Lexer: # Imprimir tabla de símbolos print (str(self.tabla)) + Parser(self.tabla).inicio() + def procesar(self, c): - if c != "\t" and c != "\n": - print (c + ' (' + str(self.selector) + ')') + # if c != "\t" and c != "\n": + # print (c + ' (' + str(self.selector) + ')') if self.selector == Selector.NINGUNO: # Entrada a string @@ -89,8 +91,7 @@ class Lexer: self.recol_operador = c return Control.SIGUIENTE # Entrada a tokens simples - elif (c == '{' or c == '}' or c == '(' or c == ')' or - c == ',' or c == '.' or c == ';' or (c == '*' and self.recol_comentario == '')): + elif c in otros_tokens or (c == '*' and self.recol_comentario == ''): self.insertar_tabla(c, None, None) return Control.SIGUIENTE |