I was doing this:

cstats.stamina = cstats.stamina + 1;

but it doesn't compile

you'd think this code compile, nope, you have to uglify your code with:

cstats.stamina = cstats.stamina + cast(ubyte) 1);

or this if you do other stuff

cstats.stamina = cast(ubyte) (cstats.stamina + 1);

this makes the code messier and annoying to type

what about the following then?

cstats.stamina = cstats.stamina + ubyte(1);

..same error message...

i don't know how any of this is called, if you know, please enlighten me

but it would be cool if it'd work

On Thursday, 10 October 2024 at 17:52:36 UTC, ryuukk_ wrote:

basically the only solution is
cstats.stamina += 1;

On Thursday, 10 October 2024 at 20:25:31 UTC, Daniel N wrote:

Using a variant can also be a good solution:

alias T = ubyte;/*
          char;//*/
alias R = const char;

import std.stdio, std.variant;
void main()
{
    T u; R v;
    writefln("%d : %d", u.sizeof,
          (true ? u : v).sizeof); // 1 : 4

    ubyte x1 = 16;
    x1 *= x1; // equal x1 = cast(typeof(x1))(x1 * x1);

    typeid(x1).writeln(": ", x1); // ubyte: 0


    Variant x2 = 16;
    x2 = x2 * x2;

    typeid(x2).writeln(": ", x2); // std.variant.VariantN!32LU.VariantN: 256

}

Integer promotion is a known thing. There's nothing we can do about it. It is not a coincidence that he was chosen especially int. If you are going to work on very large numbers, use BigInt and 100% string.

SDB@79

On Thursday, 10 October 2024 at 23:21:43 UTC, Salih Dincer wrote:

I think I acted quickly before I could show exactly what I wanted to show. Now this code is talking...

    alias T = ubyte;
    Variant x2 = T(16);
    x2.type.write(": ", x2);
    writeln(" (Variant)"); // ubyte: 16 (Variant)
    
    x2 = x2 * x2;
    x2.type.write(": ", x2);
    writeln(" (Variant)"); // uint: 256 (Variant)

    auto x3 = x2.get!int;
    typeid(x3).writeln(": ", x3); // int: 256

    x3 = T.max - x3;
    typeid(x3).writeln(": ", x3); // int: -1

SDB@79

On Thursday, 10 October 2024 at 20:25:31 UTC, Daniel N wrote:

My mistake sorry, it's cdef.stamina + 1, so can't do += 1, i should have copy pasted the whole block instead for clarity

On Thursday, 10 October 2024 at 18:58:51 UTC, Richard (Rikki) Andrew Cattermole wrote:

Now that i know how it's called i could check the documentation, thanks

Here the link for future readers: https://dlang.org/spec/type.html#integer-promotions

I think the error message could be improved to mention what it actually is then