Re: How to move append to an array?
On Monday, 15 May 2017 at 21:38:52 UTC, Yuxuan Shui wrote:
Suppose I have a
struct A {
@disable this(this);
} x;
How do I append it into an array?
Do I have to do
array.length++;
moveEmplace(x, array[$-1]);
?
Judging form the way you write the struct. It is of C/C++ style.
With that said,
it's not clear what you are trying to do. There is a basic
reference about array here:
http://dlang.org/spec/arrays.html
And this works:
cat arrayappend.d
// arrayappend.d content
unittest {
auto a = [1, 2];
a ~= 3;
assert( a == [1, 2, 3]);
}
// Finish content
Running test:
rdmd -unittest -main arrayappend.d
No error message means the test passes.
Re: How to move append to an array?
On Tuesday, 16 May 2017 at 01:34:50 UTC, Stanislav Blinov wrote: On Tuesday, 16 May 2017 at 01:22:49 UTC, Yuxuan Shui wrote: Can I expand an array with uninitialized object? Or can I rely on the compiler to optimize the initialization away? Built-in arrays always default-initialize their elements. If you need something that unsafe, there's std.array.uninitializedArray: http://dlang.org/phobos/std_array.html#uninitializedArray What are you trying to achieve? I just wish ~= could take moved objects.
Re: How to move append to an array?
On Tuesday, 16 May 2017 at 01:22:49 UTC, Yuxuan Shui wrote: Can I expand an array with uninitialized object? Or can I rely on the compiler to optimize the initialization away? Built-in arrays always default-initialize their elements. If you need something that unsafe, there's std.array.uninitializedArray: http://dlang.org/phobos/std_array.html#uninitializedArray What are you trying to achieve?
Re: How to move append to an array?
On Monday, 15 May 2017 at 23:36:06 UTC, Stanislav Blinov wrote:
On Monday, 15 May 2017 at 21:38:52 UTC, Yuxuan Shui wrote:
Suppose I have a
struct A {
@disable this(this);
} x;
How do I append it into an array?
Do I have to do
array.length++;
moveEmplace(x, array[$-1]);
?
moveEmplace is for moving an initialized object into an
uninitialized one. Use the two-argument move() function:
move(x, array[$-1]);
Can I expand an array with uninitialized object? Or can I rely on
the compiler to optimize the initialization away?
Re: How to move append to an array?
On Monday, 15 May 2017 at 21:38:52 UTC, Yuxuan Shui wrote:
Suppose I have a
struct A {
@disable this(this);
} x;
How do I append it into an array?
Do I have to do
array.length++;
moveEmplace(x, array[$-1]);
?
moveEmplace is for moving an initialized object into an
uninitialized one. Use the two-argument move() function:
move(x, array[$-1]);
