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#!/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/>.
from typing import List
from parse.base import BaseParser
from lexer import LexToken, Token
from astree.type import Type, BuiltinType, FuncType, FuncParam
from errors import Error
class ParseType:
def __init__(self, parser: BaseParser):
self.parser = parser
def _type(self) -> (Type | Error):
types = [Token.BOOLEAN, Token.CHAR, Token.INT, Token.STRING, Token.VOID]
tok = self.parser.want(*types)
if type(tok) is Error:
return tok
return BuiltinType(tok.tipo)
def prototype(self, _type: Type) -> (FuncType | Error):
params: List[FuncParam] = []
# (
tok = self.parser.want(Token.L_PAREN)
if type(tok) is Error:
return tok
while not self.parser._try(Token.R_PAREN):
# Tipo
__type = ParseType(self.parser)._type()
if type(__type) is Error:
return __type
# Identificador
name = self.parser.want(Token.IDENT)
if type(name) is Error:
return name
params.append(FuncParam(name = name.nombre,
_type = __type))
# ,
if self.parser._try(Token.COMMA):
continue
# )
if self.parser._try(Token.R_PAREN):
break
return FuncType(result = _type,
params = params)
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