diff options
Diffstat (limited to 'lexer.py')
| -rw-r--r-- | lexer.py | 69 |
1 files changed, 48 insertions, 21 deletions
@@ -9,9 +9,10 @@ def inicio_lexer(data): recol_caracter = '' recol_comentario = '' recol_operador = '' + recol_ident = '' for c in data + "\n": - print (c + ' (' + selector + ')') + # print (c + ' (' + selector + ')') if selector == '': # Entradas a tokens @@ -21,28 +22,20 @@ def inicio_lexer(data): elif c == '\'': selector = 'CHAR_LIT' continue + elif c.isalpha() or c == '_': + selector = 'ID/RESERVADA' elif c == '/': recol_comentario = '/' - elif (c == '=' or c == '+' or c == '-' or c == '&' or c == '|') and len(recol_operador) == 0: + elif (c == '=' or c == '+' or c == '-' or c == '&' or c == '|') and recol_operador == '': 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)) + elif (c == '{' or c == '}' or c == '(' or c == ')' or + c == ',' or c == ';' or (c == '*' and recol_comentario == '')): + tabla.insertar(LexToken(c, None, None, 1)) + continue # Apertura de comentario if recol_comentario == '/' and c == '*': @@ -72,7 +65,6 @@ def inicio_lexer(data): recol_string = '' else: recol_string += c - continue # Caracteres if selector == 'CHAR_LIT': @@ -86,7 +78,6 @@ def inicio_lexer(data): tabla.insertar(LexToken('CHAR_LIT', None, recol_caracter, 1)) selector = '' recol_caracter = '' - continue else: recol_caracter += c @@ -94,15 +85,51 @@ def inicio_lexer(data): if selector == 'COMMENT': if c == '*': recol_comentario = c - continue elif recol_comentario == '*': if c == '/': selector = '' recol_comentario = '' - continue else: recol_comentario = '' - continue + + # Identificador o palabra reservada + if selector == 'ID/RESERVADA': + if c.isalnum() or c == '_': + recol_ident += c + else: + if recol_ident == 'booleano': + tabla.insertar(LexToken('BOOLEAN', None, None, 1)) + elif recol_ident == 'detener': + tabla.insertar(LexToken('BREAK', None, None, 1)) + elif recol_ident == 'byte': + tabla.insertar(LexToken('BYTE', None, None, 1)) + elif recol_ident == 'caracter': + tabla.insertar(LexToken('CHAR', None, None, 1)) + elif recol_ident == 'doble': + tabla.insertar(LexToken('DOUBLE', None, None, 1)) + elif recol_ident == 'sino': + tabla.insertar(LexToken('ELSE', None, None, 1)) + elif recol_ident == 'porcada': + tabla.insertar(LexToken('FOR', None, None, 1)) + elif recol_ident == 'si': + tabla.insertar(LexToken('IF', None, None, 1)) + elif recol_ident == 'entero': + tabla.insertar(LexToken('INT', None, None, 1)) + elif recol_ident == 'imprimir': + tabla.insertar(LexToken('PRINT', None, None, 1)) + elif recol_ident == 'leer': + tabla.insertar(LexToken('READ', None, None, 1)) + elif recol_ident == 'retorna': + tabla.insertar(LexToken('RETURN', None, None, 1)) + elif recol_ident == 'vacio': + tabla.insertar(LexToken('VOID', None, None, 1)) + elif recol_ident == 'mientras': + tabla.insertar(LexToken('WHILE', None, None, 1)) + else: + tabla.insertar(LexToken('IDENT', recol_ident, None, 1)) + recol_ident = '' + selector = '' + # Imprimir tabla de símbolos print (str(tabla)) |