On Friday, 2 January 2026 at 13:09:44 UTC, Lars Johansson wrote:
I'm writing a simple program just to get started (se below).
mat[i][z] = z; this line generate following error:
cannot implicitly convert expression `z` of type `ulong`
to `char`
There are a number of ways to avoid this conversion, but I'm
interested in best way to convert between types. How do I do
this conversion best D practice.
Is there a cheet sheet where I can find preferably all possible
conversions between types?
That sheet would save me hours and hours and lots of screaming
in agony.
import std.stdio;
void main()
{
writeln("Hello, world without explicit compilations!");
auto xmat = [
['a','a','a','a','a','a','a','a']
,['*','*','*','*','*','*','*','*']
,['*','*','*','*','*','*','*','*']
];
initmat(xmat);
}
void initmat (char[][] mat) {
import std.conv;
foreach (i, row; mat) {
foreach (z, tek; row) {
// writeln(tek);
mat[i][z] = z;
}
}
}
I found a solution wchar cast(wchar) (z + '0');
first declare the array as wchar
then add '0' to the value
then cast(wchar) (z + '0')
I do not find this very easy to figure out. I found the
conversion chapter in the manual from there I saw wchar is more
likely to work. the add zero claude helped me with.
A cheet sheet would be very nice to have.
From this I learned to hex display everything that I have
conversion problem with.
