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
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
#!/bin/env python
# -*- coding: utf-8 -*-
# Copyright (C) 2022 Iván Alejandro Ávalos Díaz <avalos@disroot.org>
# Edgar Alexis López Martínez <edgarmlmp@gmail.com>
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
import json, os
from enum import Enum, auto
from dataclasses import dataclass
from typing import Any
# from more_itertools import seekable
from nanoiter import NanoIter
reservadas = [
'booleano',
'cadena',
'caracter',
'continuar',
'detener',
'entero',
'funcion',
'imprimir',
'leer',
'mientras',
'retornar',
'si',
'sino',
'vacio',
]
literales = [
'BOOLEAN_LIT',
'CHAR_LIT',
'DOUBLE_LIT',
'INT_LIT',
'STRING_LIT'
]
tokens = reservadas + literales + [
'{', '}', '(', ')', ',', '\'',
'"', ';', '=', '*', '/', '+',
'-', '>', '<', '>=', '<=', '&&',
'||', '==', '!='
]
class Token(Enum):
BOOLEAN = 'booleano'
CHAR = 'caracter'
DOUBLE = 'doble'
ELSE = 'sino'
IDENT = 'IDENT'
IF = 'si'
INT = 'entero'
PRINT = 'imprimir'
READ = 'leer'
BREAK = 'detener'
CONTINUE = 'continuar'
RETURN = 'retornar'
STRING = 'cadena'
VOID = 'vacio'
FUNCTION = 'funcion'
WHILE = 'mientras'
BOOLEAN_LIT = 'BOOLEAN_LIT'
INT_LIT = 'INT_LIT'
CHAR_LIT = 'CHAR_LIT'
STRING_LIT = 'STRING_LIT'
L_BRACKET = '{'
R_BRACKET = '}'
L_PAREN = '('
R_PAREN = ')'
COMMA = ','
SQUOTE = '\''
DQUOTE = '"'
SEMICOLON = ';'
EQUAL = '='
TIMES = '*'
SLASH = '/'
PLUS = '+'
MINUS = '-'
GT = '>'
LT = '<'
GEQ = '>='
LEQ = '<='
AND = '&&'
OR = '||'
EQEQ = '=='
NOTEQ = '!='
EOF = 'EOF'
@dataclass
class LexToken:
tipo: Token
nombre: str
valor: Any
numlinea: int
def __str__(self):
return "LexToken(%s,%s,%s,%i)" % (
self.tipo.name, 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 iterar(self):
return NanoIter(self.tabla)
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.value,
'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(Token(t['tipo']),
t['nombre'],
t['valor'],
t['numlinea']))
def __str__(self):
output = ""
for t in self.tabla:
output += str(t) + "\n"
return output
|
