1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
import json, os
from enum import Enum
from dataclasses import dataclass
from typing import Any
reservadas = [
'BOOLEAN',
'BREAK',
'CHAR',
'DOUBLE',
'ELSE',
'FOR'
'IDENT',
'IF',
'INT',
'PRINT',
'READ',
'RETURN',
'STRING',
'VOID',
'WHILE'
]
literales = [
'BOOLEAN_LIT',
'CHAR_LIT',
'DOUBLE_LIT',
'INT_LIT',
'STRING_LIT'
]
tokens = reservadas + literales + [
'{', '}', '(', ')', ',', '\'',
'"', ';', '=', '*', '/', '+',
'-', '>', '<', '>=', '<=', '&&',
'||', '==', '!=', '++', '--', '//'
]
@dataclass
class LexToken:
tipo: str
nombre: str
valor: Any
numlinea: int
def __str__(self):
return "LexToken(%s,%s,%s,%i)" % (
self.tipo, self.nombre, self.valor, self.numlinea
)
class TablaLex:
def __init__(self):
self.tabla = []
def insertar(self, tok: LexToken):
self.tabla.append(tok)
def buscar(self, nombre: str):
return [t for t in self.tabla if t.nombre == nombre][0]
def actualizar(self, nombre: str, tok: LexToken):
for i, t in enumerate(self.tabla):
if t.nombre == nombre:
self.tabla[i] = tok
return
def exportar(self, output_file):
data = []
for t in self.tabla:
data.append({
'tipo': t.tipo,
'nombre': t.nombre,
'valor': t.valor,
'numlinea': t.numlinea
})
output = json.dumps(data)
if os.path.exists(output_file):
os.remove(output_file)
with open(output_file, 'w+') as f:
f.truncate(0)
f.write(output)
def importar(self, input_file):
with open(input_file, 'r') as f:
data = json.loads(f.read())
for t in data:
self.insertar(LexToken(t['tipo'],
t['nombre'],
t['valor'],
t['numlinea']))
def __str__(self):
output = ""
for t in self.tabla:
output += str(t) + "\n"
return output
|
