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I need my struct to convertable to 'wchar'
Jun 17
Zoda
Jun 17
monkyyy
Jun 17
Zoda
Jun 17
Zoda
Jun 18
Zoda
June 17
Gravatar of ZodaPosted by ZodaReply
Zoda
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Hi, I need my struct to convertable to 'wchar' my struct looks like this

struct ColoredChar {
    int[3] rgb;
    wchar ch;
}

// Existing functions looks like this
void doSomething(wchar ch) {
    ...
}

i don't want my existing functions to break so i need my struct to be convertable to a 'wchar', how can achieve this?

Thanks, Zoda.

June 17
Gravatar of monkyyyPosted by monkyyy
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On Tuesday, 17 June 2025 at 19:15:33 UTC, Zoda wrote:

>

Hi, I need my struct to convertable to 'wchar' my struct looks like this

struct ColoredChar {
    int[3] rgb;
    wchar ch;
}

// Existing functions looks like this
void doSomething(wchar ch) {
    ...
}

i don't want my existing functions to break so i need my struct to be convertable to a 'wchar', how can achieve this?

Thanks, Zoda.

 
import std;
struct ColoredChar {
	int[3] rgb;
	wchar ch(){
		return 'a';
	}
	alias ch this;
}

// Existing functions looks like this
void doSomething(wchar ch) {
	ch.writeln;
}
unittest{
	ColoredChar().doSomething;
}
June 17
Gravatar of H. S. TeohPosted by H. S. Teoh
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H. S. Teoh
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On Tue, Jun 17, 2025 at 07:15:33PM +0000, Zoda via Digitalmars-d wrote:
> Hi, I need my struct to convertable to 'wchar' my struct looks like this
> ```d
> struct ColoredChar {
>     int[3] rgb;
>     wchar ch;
> }
> 
> // Existing functions looks like this
> void doSomething(wchar ch) {
>     ...
> }
> ```
> i don't want my existing functions to break so i need my struct to be
> convertable to a 'wchar', how can achieve this?
[...]

```d
struct ColoredChar {
	int[3] rgb;
	wchar ch;
	alias ch this;
}
```


--T
June 17
Gravatar of ZodaPosted by Zoda
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Zoda
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Posted in reply to monkyyy


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On Tuesday, 17 June 2025 at 19:29:16 UTC, monkyyy wrote:

>

On Tuesday, 17 June 2025 at 19:15:33 UTC, Zoda wrote:

>

Hi, I need my struct to convertable to 'wchar' my struct looks like this

struct ColoredChar {
    int[3] rgb;
    wchar ch;
}

// Existing functions looks like this
void doSomething(wchar ch) {
    ...
}

i don't want my existing functions to break so i need my struct to be convertable to a 'wchar', how can achieve this?

Thanks, Zoda.

 
import std;
struct ColoredChar {
	int[3] rgb;
	wchar ch(){
		return 'a';
	}
	alias ch this;
}

// Existing functions looks like this
void doSomething(wchar ch) {
	ch.writeln;
}
unittest{
	ColoredChar().doSomething;
}

Thanks, i works but can i want to do something like ColoredChar([255,0,0], '█')
can its possible?

Thanks again, Zoda.

June 17
Gravatar of ZodaPosted by Zoda
in reply to H. S. Teoh		Reply
Zoda
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Posted in reply to H. S. Teoh


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On Tuesday, 17 June 2025 at 19:31:30 UTC, H. S. Teoh wrote:
> On Tue, Jun 17, 2025 at 07:15:33PM +0000, Zoda via Digitalmars-d wrote:
>> Hi, I need my struct to convertable to 'wchar' my struct looks like this
>> ```d
>> struct ColoredChar {
>>     int[3] rgb;
>>     wchar ch;
>> }
>> 
>> // Existing functions looks like this
>> void doSomething(wchar ch) {
>>     ...
>> }
>> ```
>> i don't want my existing functions to break so i need my struct to be
>> convertable to a 'wchar', how can achieve this?
> [...]
>
> ```d
> struct ColoredChar {
> 	int[3] rgb;
> 	wchar ch;
> 	alias ch this;
> }
> ```
>
>
> --T

Oh thanks thats works just fine now. Thanks for you answer.
June 17
Gravatar of H. S. TeohPosted by H. S. Teoh
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H. S. Teoh
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On Tue, Jun 17, 2025 at 07:36:27PM +0000, Zoda via Digitalmars-d wrote:
> On Tuesday, 17 June 2025 at 19:31:30 UTC, H. S. Teoh wrote:
[...]
> > ```d
> > struct ColoredChar {
> > 	int[3] rgb;
> > 	wchar ch;
> > 	alias ch this;
> > }
> > ```
[...]
> Oh thanks thats works just fine now. Thanks for you answer.

Glad it works.

But you should know that `alias this` is generally regarded as an anti-pattern; it's great for a quick hack to get things done, but in the long term, you should probably refactor your code to avoid it.


T

-- 
If you want to solve a problem, you need to address its root cause, not just its symptoms. Otherwise it's like treating cancer with Tylenol...
June 18
Gravatar of ZodaPosted by Zoda
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Zoda
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On Tuesday, 17 June 2025 at 21:39:59 UTC, H. S. Teoh wrote:
> On Tue, Jun 17, 2025 at 07:36:27PM +0000, Zoda via Digitalmars-d wrote:
>> On Tuesday, 17 June 2025 at 19:31:30 UTC, H. S. Teoh wrote:
> [...]
>> > ```d
>> > struct ColoredChar {
>> > 	int[3] rgb;
>> > 	wchar ch;
>> > 	alias ch this;
>> > }
>> > ```
> [...]
>> Oh thanks thats works just fine now. Thanks for you answer.
>
> Glad it works.
>
> But you should know that `alias this` is generally regarded as an anti-pattern; it's great for a quick hack to get things done, but in the long term, you should probably refactor your code to avoid it.
>
>
> T

I'm currently working on refactoring my code. Thanks again, Zoda.