io = {};
io.wchar = 111111;
debug((string)io.wchar); // (null)
So the problem here is that io.wchar is still null. You can look at the whole class here: https://github.com/stsdc/monitor/blob/dev/src/Managers/Process.vala
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2 Answers
I think the issue is you are using a cast, try using io.wchar.to_string() [https://valadoc.org/glib-2.0/uint64.to_string.html]
Edit: This worked for me based on your code, casting gave me a segfault.
struct Monitor.IO {
public uint64 wchar;
}
int main (string[] args) {
Monitor.IO io = {};
io.wchar = 111111;
warning (io.wchar.to_string ()); // Struct.vala:9: 111111
return 0;
}
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In my case it showed
0. And also, please note, that I'm using this inside a class. Maybe there is something wrong with a declaration?– stsdcJan 5, 2020 at 23:59 -
I would try switching to just defining the property, rather than using get; set; I think there is an issue there but I do not know what. Jan 6, 2020 at 1:17
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Okay, I ran your code, I think you need those two changes and it works for me. Jan 6, 2020 at 1:24
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1I think io.wchar = 111111; is getting a copy of io as it is running (io.get().wchar, where get passes a copy not a reference), and then changing the value of wchar of the copy, and then the printing is getting a new copy of io, but the modified version is not being set. Jan 6, 2020 at 1:55
Two possible solutions:
- Boxing:
IO? io { get; set; default = IO(); }Note the question mark. (Solution by David Hewitt) - Removing get/set:
IO io;(Solution by thalexander)