SCSS selectors for the first and last row of a table

table-rows.scss

// http://www.w3.org/TR/html5/tabular-data.html#the-table-element

@mixin first-row() {
    & >,
    > thead >,
    > tbody:first-child >,
    > caption:first-child + tbody >,
    > caption:first-child ~ colgroup + tbody >,
    > colgroup:first-child + tbody >,
    > colgroup:first-child ~ colgroup + tbody >,
    > caption:first-child +,
    > caption:first-child ~ colgroup +,
    > colgroup:first-child +,
    > colgroup:first-child ~ colgroup +,
    > caption:first-child + tfoot:last-child >,
    > caption:first-child ~ colgroup + tfoot:last-child >,
    > colgroup:first-child + tfoot:last-child >,
    > colgroup:first-child ~ colgroup + tfoot:last-child > {
        tr:first-child > {
            @content;
        }
    }
}

@mixin last-row() {
    > tfoot >,
    > caption:first-child + tbody:last-child >,
    > caption:first-child ~ colgroup + tbody:last-child >,
    > caption:first-child ~ thead + tbody:last-child >,
    > caption:first-child + tbody ~ tbody:last-child >,
    > caption:first-child ~ colgroup + tbody ~ tbody:last-child >,
    > caption:first-child ~ thead + tbody ~ tbody:last-child >,
    > colgroup:first-child + tbody:last-child >,
    > colgroup:first-child ~ colgroup + tbody:last-child >,
    > colgroup:first-child ~ thead + tbody:last-child >,
    > colgroup:first-child + tbody ~ tbody:last-child >,
    > colgroup:first-child ~ colgroup + tbody ~ tbody:last-child >,
    > colgroup:first-child ~ thead + tbody ~ tbody:last-child >,
    > thead:first-child + tbody:last-child >,
    > thead:first-child + tbody ~ tbody:last-child >,
    > tbody:first-child ~ tbody:last-child >,
    > tbody:first-child:last-child >,
    > caption:first-child +,
    > caption:first-child ~ colgroup +,
    > caption:first-child ~ thead +,
    > caption:first-child + tr ~,
    > caption:first-child ~ colgroup + tr ~,
    > caption:first-child ~ thead + tr ~,
    > colgroup:first-child +,
    > colgroup:first-child ~ colgroup +,
    > colgroup:first-child ~ thead +,
    > colgroup:first-child + tr ~,
    > colgroup:first-child ~ colgroup + tr ~,
    > colgroup:first-child ~ thead + tr ~,
    > thead:first-child +,
    > thead:first-child + tr ~,
    > tr:first-child ~ {
        tr:last-child > {
            @content;
        }
    }

    > tr:first-child:last-child {
        @content;
    }
}