On 30/05/13 16:21, Ali Çehreli wrote:
On 05/29/2013 06:54 PM, Peter Williams wrote: > Wouldn't a better rule for pass by value be that any changes to > the data part of the array (including assignment to an element) causes > reallocation of the entire data portion.The type of a slice parameter is not different than a local slice variable. Since we wouldn't want an entire copy of the elements due to an element mutation: int[] whole = // ...; int[] firstHalf = whole[0 .. $/2]; firstHalf = 42; // this should affect whole Moving the last two lines to a new function should not change meaning: int[] whole = // ...; setFirstHalf(whole, 42); // should still affect whole
I think that setFirstHalf() should only effect whole if it's passed in by reference. I certainly intend to adopt that practice in my D code.
Peter
