It's possible to use a mapping like this:

    inoremap <silent> sf <c-r><c-r>=getline('.')->strcharpart(0,getpos('.')[2]-1)->substitute('.*;','','')->substitute('=.*','','')->trim()<cr>

(For older version where "method call" is not available it's possible to use

    inoremap <silent> sf <c-r><c-r>=trim(substitute(substitute(strcharpart(getline('.'),0,getpos('.')[2]-1),'.*;','',''),'=.*','',''))

instead)

So you only need to type

<pre><code>table[row][col] = std::max(<b>sf</b>, other_table[row+1][col+1])
</code></pre>

The `sf` typed will expand to `table[row][col]` in this case.