On Friday, 5 July 2013 at 02:45:47 UTC, Maxim Fomin wrote:
On Thursday, 4 July 2013 at 21:31:43 UTC, TommiT wrote:
On Thursday, 4 July 2013 at 20:43:45 UTC, Maxim Fomin wrote:
Implementation may do other way, at first instantiate
template (with deduced type) and then try to plug arguments
as in case of non-template function (including implicit
conversion). If it cannot, implementation issues error
message for a particular problem and then general "template
error instantiation".
Well, it doesn't really matter how it is implemented. What
matters is that the implicit conversion does happen.
Issue in this case is not that it happens per se (of course, it
does), but whether implicit conversion influences type
deduction. As it was mentioned previously about particular
example, it does not.
Of course implicit conversion influences type deduction. If it
didn't, if implicit conversion didn't have any say in type
deduction, then the call foo(sa) would not compile. The compiler
needs to know, and thus has to be influenced by the knowledge of
implicit conversion, in order to be able to deduce T to be int.
On Friday, 5 July 2013 at 02:45:47 UTC, Maxim Fomin wrote:
What are your points regarding type deduction and implicit
conversion in D?
I thought my point would have been made painstakingly clear by
now. My point is that D behaves in a way that's very different
from C++ or any other language which does heterogeneous
translation of type parameters. And I've never seen any
mention of this neither in the spec nor in TDPL (nor have I
seen this discussed before). This difference should be
mentioned somewhere newcomers are guaranteed to see it.
Please provide evidence which support your point about D.
Previous example doesn't do that. Piece of dmd implementation
is appreciated. Otherwise claims about what implementation does
are of little value.
The evidence of that D behaves differently from C++ is that
foo(sa) compiles. I only talked about a possible implementation
of it in DMD in order to explain this thing to you. But the
actual implementation of it in DMD doesn't matter.
