Method is_declaration_start

crates/hll-to-ir/src/parser.rs:1709–1724

(&self)

                Ok(Type::Named {
                    name: Path::from_segments(segments),
                    args,
                })
            }
            Some(Token::LBrace) => self.parse_struct_type(),
            Some(Token::LParen) => self.parse_function_pointer_type(),
            Some(tok) => Err(self.error_with_token("expected type", tok)),
            None => Err(self.error("unexpected end of input while parsing type")),
        }
    }

    fn parse_function_pointer_type(&mut self) -> Result<Type, ParserError> {
        self.expect_lparen()?;
        let mut params = Vec::new();
        self.consume_terminators();
        if !self.check_rparen() {
            loop {
                params.push(self.parse_type()?);
                self.consume_terminators();