struct mess
{
union
{
int i;
string s;
}
double x;
}
How do I cleanly initialize this, assuming it's i that I want to
give an overt value to?
The docs say "If there are anonymous unions in the struct, only
the first member of the anonymous union can be initialized with a
struct literal, and all subsequent non-overlapping fields are
default initialized". This is not helpful.
https://dlang.org/spec/struct.html#struct-literal
The above is a toy example distilled from a real problem. The
struct comes from a C library and is very long and contains
several anonymous unions. The D declaration of the struct was
made by someone else who made the library available to D.
I printed out such a struct returned by a call to the library,
and wanted to create my own from scratch. But it seems that I
can't just copy what writeln printed and edit it into an
initialization analogous to
mess m = { 99, 3.14 };
with the above, because I just get the analog of
Error: overlapping initialization for field i and s
Error: cannot implicitly convert expression (3.14) of type double
to string
and the alternative more like what is printed by writeln,
auto m = mess(99, 3.14);
produces a similar error message.
So it seems I am forced to assign explicitly to each member of
the struct, an ugly process.
What is a nice way to solve this problem?
