On Wednesday, 2 October 2019 at 17:54:20 UTC, H. S. Teoh wrote:
On Wed, Oct 02, 2019 at 05:37:57PM +0000, Brett via
Digitalmars-d-learn wrote:
struct X { int a; }
X[1] x;
x[0] = {3};
or
x[0] = {a:3};
fails;
This works:
x[0] = X(123);
I'd knew I'd gotten the impression from somewhere that this was
the
recommended way to initialize structs, but it took me a while to
find
it.
Learning D:
auto ms1 = MyStruct(10, 11);// struct literal
MyStruct ms2 = {10, 11}; // C-style, not preferred
MyStruct ms3 = {b:11, a:10};// Named initializers
..
Struct literals are convenient for simple types ...
but they only allow for direct initialization of member
variables. If more complex initialization is required, struct
constructors should be used.
And then the impression was probably just from every single
example
using the first form.
https://dlang.org/spec/struct.html#static_struct_init doesn't say
that
this is dispreferred in any way, nor does it emphasize that you
can't
use initialization syntax to assign to an already initialized
variable
(this is probably obvious to C types). But there are 'Best
Practices'
notes elsewhere in the page. This section could have one of
those, to
say to just use the constructors.
