Method opt_parse

src/testdrive/src/parser.rs:819–833

(&mut self, name: &str)

    }

    pub fn opt_parse<T>(&mut self, name: &str) -> Result<Option<T>, anyhow::Error>
    where
        T: FromStr,
        T::Err: Error + Send + Sync + 'static,
    {
        match self.opt_string(name) {
            Some(val) => {
                let t = val
                    .parse()
                    .with_context(|| format!("parsing {} parameter", name))?;
                Ok(Some(t))
            }
            None => Ok(None),
        }
    }

    pub fn parse<T>(&mut self, name: &str) -> Result<T, anyhow::Error>
    where