Method expect_scene_key

perro_source/runtime_project/perro_scene/src/parser.rs:63–77

(&mut self)

            other => Err(format!("Expected identifier, got {:?}", other)),
        }
    }

    fn expect_scene_key(&mut self) -> ParseResult<Cow<'a, str>> {
        let mut at_count = 0;
        while self.current == Token::At {
            self.advance();
            at_count += 1;
        }
        let ident = self.expect_ident()?;
        if at_count == 0 {
            return Ok(Cow::Borrowed(ident));
        }
        let mut key = String::with_capacity(at_count + ident.len());
        key.extend(std::iter::repeat_n('@', at_count));
        key.push_str(ident);
        Ok(Cow::Owned(key))
    }