Method optional_memflags

cranelift/reader/src/parser.rs:902–925

Match and a consume a possibly empty sequence of memory operation flags.

(&mut self)

    // Match and a consume a possibly empty sequence of memory operation flags.
    fn optional_memflags(&mut self) -> ParseResult<MemFlagsData> {
        let mut flags = MemFlagsData::new();
        loop {
            match self.token() {
                Some(Token::Identifier(text)) => match flags.set_by_name(text) {
                    Ok(true) => {
                        self.consume();
                    }
                    Ok(false) => break,
                    Err(msg) => return err!(self.loc, msg),
                },
                Some(Token::AliasRegion(n)) => {
                    if flags.alias_region().is_some() {
                        return err!(self.loc, "cannot set more than one alias region");
                    }
                    let region = ir::AliasRegion::new(n as usize);
                    flags.set_alias_region(Some(region));
                    self.consume();
                }
                _ => break,
            }
        }
        Ok(flags)
    }

    // Match and consume an identifier.
    fn match_any_identifier(&mut self, err_msg: &str) -> ParseResult<&'a str> {