On Thursday, 15 August 2013 at 02:30:54 UTC, Jonathan M Davis
wrote:
On Thursday, August 15, 2013 02:57:25 Tommi wrote:
Thus, my point is this:
Shouldn't this magical property of static arrays (implicitly
converting to dynamic array during type deduction) extend to
all
type deduction situations?
No. If anything, we should get rid of the implicit conversion
from a static
array to a dynamic one. It's actually unsafe to do so. It's
just like if you
implicitly converted a local variable to the address of that
local variable
when you passed it to a function that accepted a pointer. IMHO,
it never
should have been allowed in the first place. At least with
taking the address
of a local variable, the compiler treats it as @system. The
compiler doesn't
currently do that with taking the slice of a static array.
http://d.puremagic.com/issues/show_bug.cgi?id=8838
If you want a dynamic array from a static one, then slice it.
That works just
fine with templated functions, and makes what you want
explicit. Also, making
it so that IFTI instantiated templates with the dynamic array
type when given
a static array would make it so that you would have to
explicitly instantiate
any templates where you actually wanted to pass a static array,
which is a
definite negative IMHO.
At this point, I don't really expect that it'll be changed so
that static
arrays do not implicitly convert to dynamic ones (much as it
would be ideal to
make that change), but I really don't think that we should do
anything to make
the problem worse by adding yet more such implicit conversions.
- Jonathan M Davis
+1
