Method index

src/sql/src/func.rs:663–668

(&self, i: usize)

    type Output = ParamType;

    fn index(&self, i: usize) -> &Self::Output {
        match self {
            Self::Exact(p) => &p[i],
            Self::Variadic { leading, trailing } => leading.get(i).unwrap_or(trailing),
        }
    }
}

/// Provides a shorthand function for writing `ParamList::Exact`.