On Monday, 16 October 2017 at 12:00:13 UTC, drug wrote:
I refactored `MyStructure` added own implementation of malloced
array based on pureRealloc/pureFree instead of dynamic array I
used before and now I have error:
Error: cannot implicitly convert expression get(msg.getData())
of type const(MyStructure) to MyStructure.
What operators should I overload to let this conversion? I've
tryed opCast and it fails in other call sites, also I've tried
opAssign - it didn't works, what worked is wrapping in ctor -
MyStruct(const_var). But using ctor is not convenient.
The reason this doesn't work is you have some sort of
non-immutable pointer, reference or array in your struct. I'm not
sure why this worked before, since I have no idea what your code
looks like. Hence, I can only give limited advice. Notably, the
reasons this gives you a warning is because it would be unsafe to
do a simple cast.
You might have turned immutable(T)[] into T[] (where T is int,
byte, char, what-have-you). If this is the case, consider why
this happened, and try to turn it back into immutable(T)[]. The
same goes for immutable(T)*. Remember that an alias can make
something immutable, so it might not be immediately obvious.
If you're fine with being unsafe, and can't find a solution like
the above, consider this:
struct MyStruct {
MyStruct getUnsafe() const {
return cast(MyStruct)this;
}
alias getUnsafe this;
}
--
Biotronic
