// rustfmt-single_line_let_else_max_width: 100

fn main() {
    let Some(a) = opt else {};

    let Some(b) = opt else { return };

    let Some(c) = opt else { return };

    let Some(c) = opt else {
        // a comment should always force the block to be multi-lined
        return;
    };

    let Some(c) = opt else {
        /* a comment should always force the block to be multi-lined */
        return;
    };

    let Some(d) = some_very_very_very_very_long_name else { return };

    let Expr::Slice(ast::ExprSlice {
        lower,
        upper,
        step,
        range: _,
    }) = slice.as_ref()
    else {
        return;
    };

    let Some((base_place, current)) = self.lower_expr_as_place(current, *base, true)? else {
        return Ok(None);
    };

    let Some(doc_attr) = variant
        .attrs
        .iter()
        .find(|attr| attr.path().is_ident("doc"))
    else {
        return Err(Error::new(variant.span(), r#"expected a doc comment"#));
    };

    let Some((base_place, current)) = self.lower_expr_as_place(current, *base, true) else {
        return Ok(None);
    };

    let Stmt::Expr(
        Expr::Call(ExprCall {
            args: some_args, ..
        }),
        _,
    ) = last_stmt
    else {
        return Err(Error::new(
            last_stmt.span(),
            "expected last expression to be `Some(match (..) { .. })`",
        ));
    };
}