On Wednesday, 21 October 2015 at 19:18:44 UTC, Andrei
Alexandrescu wrote:
On 10/21/2015 02:24 PM, Robert burner Schadek wrote:
On Wednesday, 21 October 2015 at 17:23:15 UTC, Andrei
Alexandrescu wrote:
Even simpler, hasMethod!(Container, "append") -- Andrei
I know this goes against your talk at DConf, but having to
write string
parameters does not feel good. I'm will properly not be the
only one who
will mistype "apend" and wonder why the other template
function will be
chosen. I rather have the compiler scream at me telling me
there is no
symbol hasApend. And hasAppend!Container is less typing than
hasMethod!(Container, "append").
Yah, but defining isXxx for dozens of Xxx doesn't sit well
either. -- Andrei
So, instead we make it ad hoc where only the name is tested
rather than anything about what the function is or does, and we
make it that much harder for folks to know what the vocabulary
list of functions is, because there's no list of traits to test
for them and just a table in some piece of documentation
somewhere? I just don't see this scaling well if we're not more
rigorous about it than hasMethod!(Container, "append"). If all of
the containers are in Phobos and nothing outside of Phobos is
actually testing for any of these methods, then it's a much
smaller issue, but if any of this method testing is going to
happen outside of Phobos, then I definitely think that it's a bad
idea to be this ad hoc about it.
- Jonathan M Davis
