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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 = [
'BOOLEAN',
'CHAR',
'DOUBLE',
'ELSE',
'IDENT',
'IF',
'INT',
'PRINT',
'READ',
'RETURN',
'STRING',
'VOID',
'WHILE',
'FUNCTION'
]
literales = [
'BOOLEAN_LIT',
'CHAR_LIT',
'DOUBLE_LIT',
'INT_LIT',
'STRING_LIT'
]
class Token(Enum):
BOOLEAN = 'booleano'
CHAR = 'caracter'
DOUBLE = 'doble'
ELSE = 'sino'
IDENT = 'IDENT'
IF = 'si'
INT = 'entero'
PRINT = 'imprimir'
READ = 'leer'
RETURN = 'retorna'
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'
tokens = reservadas + literales + [
'{', '}', '(', ')', ',', '\'',
'"', ';', '=', '*', '/', '+',
'-', '>', '<', '>=', '<=', '&&',
'||', '==', '!='
]
@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
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