Function parse_run_command

cranelift/reader/src/parser.rs:183–195

Parse a CLIF comment `text` as a run command. Return: - `Ok(None)` if the comment is not intended to be a `RunCommand` (i.e. does not start with `run` or `print` - `Ok(Some(command))` if the comment is intended as a `RunCommand` and can be parsed to one - `Err` otherwise.

(text: &str, signature: &Signature)

///  - `Ok(Some(command))` if the comment is intended as a `RunCommand` and can be parsed to one
///  - `Err` otherwise.
pub fn parse_run_command(text: &str, signature: &Signature) -> ParseResult<Option<RunCommand>> {
    let _tt = timing::parse_text();
    // We remove leading spaces and semi-colons for convenience here instead of at the call sites
    // since this function will be attempting to parse a RunCommand from a CLIF comment.
    let trimmed_text = text.trim_start_matches(|c| c == ' ' || c == ';');
    let mut parser = Parser::new(trimmed_text);
    match parser.token() {
        Some(Token::Identifier("run")) | Some(Token::Identifier("print")) => {
            parser.parse_run_command(signature).map(|c| Some(c))
        }
        Some(_) | None => Ok(None),
    }
}

pub struct Parser<'a> {
    lex: Lexer<'a>,