Function cranelift_reader::parse_options

pub fn parse_options<'a, I>(
    iter: I,
    config: &mut dyn Configurable,
    loc: Location
) -> Result<(), ParseOptionError>where
    I: Iterator<Item = &'a str>,

Parse an iterator of command line options and apply them to config.

Examples found in repository

src/parser.rs (lines 1161-1165)

    fn parse_target_specs(&mut self, options: &ParseOptions) -> ParseResult<isaspec::IsaSpec> {
        // Were there any `target` commands?
        let mut seen_target = false;
        // Location of last `set` command since the last `target`.
        let mut last_set_loc = None;

        let mut targets = Vec::new();
        let mut flag_builder = settings::builder();

        let unwind_info = if options.unwind_info { "true" } else { "false" };
        flag_builder
            .set("unwind_info", unwind_info)
            .expect("unwind_info option should be present");

        while let Some(Token::Identifier(command)) = self.token() {
            match command {
                "set" => {
                    last_set_loc = Some(self.loc);
                    isaspec::parse_options(
                        self.consume_line().trim().split_whitespace(),
                        &mut flag_builder,
                        self.loc,
                    )
                    .map_err(|err| ParseError::from(err))?;
                }
                "target" => {
                    let loc = self.loc;
                    // Grab the whole line so the lexer won't go looking for tokens on the
                    // following lines.
                    let mut words = self.consume_line().trim().split_whitespace().peekable();
                    // Look for `target foo`.
                    let target_name = match words.next() {
                        Some(w) => w,
                        None => return err!(loc, "expected target triple"),
                    };
                    let triple = match Triple::from_str(target_name) {
                        Ok(triple) => triple,
                        Err(err) => return err!(loc, err),
                    };
                    let mut isa_builder = match isa::lookup(triple) {
                        Err(isa::LookupError::SupportDisabled) => {
                            continue;
                        }
                        Err(isa::LookupError::Unsupported) => {
                            return warn!(loc, "unsupported target '{}'", target_name);
                        }
                        Ok(b) => b,
                    };
                    last_set_loc = None;
                    seen_target = true;
                    // Apply the target-specific settings to `isa_builder`.
                    isaspec::parse_options(words, &mut isa_builder, self.loc)?;

                    // Construct a trait object with the aggregate settings.
                    targets.push(
                        isa_builder
                            .finish(settings::Flags::new(flag_builder.clone()))
                            .map_err(|e| ParseError {
                                location: loc,
                                message: format!(
                                    "invalid ISA flags for '{}': {:?}",
                                    target_name, e
                                ),
                                is_warning: false,
                            })?,
                    );
                }
                _ => break,
            }
        }

        if !seen_target {
            // No `target` commands, but we allow for `set` commands.
            Ok(isaspec::IsaSpec::None(settings::Flags::new(flag_builder)))
        } else if let Some(loc) = last_set_loc {
            err!(
                loc,
                "dangling 'set' command after ISA specification has no effect."
            )
        } else {
            Ok(isaspec::IsaSpec::Some(targets))
        }
    }