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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,
_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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