Hi,
i was trying to initialize a list of strings (related to my previous post
about assembling bytecode) into an associative array,
i got the following error message "null is not an lvalue"
the array declaration is
     const ubyte[char[]] mnemonics;

this is an example for one of the lines i used to initialize the array:

    mnemonics["EXIT"]=cast(ubyte)0xFF;

any ideas ?

- Asaf.

i feel so stupid :)
i forgot to remove the const from the array declaration when i changed it to
an associative array..

- Asaf.


"Asaf Karagila" <kas1@netvision.net.il> wrote in message news:cpeolu$1vjf$1@digitaldaemon.com...
> Hi,
> i was trying to initialize a list of strings (related to my previous post
> about assembling bytecode) into an associative array,
> i got the following error message "null is not an lvalue"
> the array declaration is
>     const ubyte[char[]] mnemonics;
>
> this is an example for one of the lines i used to initialize the array:
>
>    mnemonics["EXIT"]=cast(ubyte)0xFF;
>
> any ideas ?
>
> - Asaf.
> 

I don't understand the reason why you want a constant associative array, because this easy solvable using an enumeration and a normal array, just as the following:

/*CODE*/
public enum Codes {Exit};
public const static ubyte map[] = [0xff : Codes.Exit];
/*END_CODE*/

You are able to select the right values using the Codes enumeration.

Regards,
Sjoerd

Asaf Karagila wrote:
> i feel so stupid :)
> i forgot to remove the const from the array declaration when i changed it to an associative array..
> 
> - Asaf.
> 
> 
> "Asaf Karagila" <kas1@netvision.net.il> wrote in message news:cpeolu$1vjf$1@digitaldaemon.com...
> 
>>Hi,
>>i was trying to initialize a list of strings (related to my previous post about assembling bytecode) into an associative array,
>>i got the following error message "null is not an lvalue"
>>the array declaration is
>>    const ubyte[char[]] mnemonics;
>>
>>this is an example for one of the lines i used to initialize the array:
>>
>>   mnemonics["EXIT"]=cast(ubyte)0xFF;
>>
>>any ideas ?
>>
>>- Asaf.
>>
> 
> 
> 

Correction:

public enum Codes {Exit = 0xff};

This is sufficient.


Regards,
Sjoerd

Sjoerd van Leent wrote:
> I don't understand the reason why you want a constant associative array, because this easy solvable using an enumeration and a normal array, just as the following:
> 
> /*CODE*/
> public enum Codes {Exit};
> public const static ubyte map[] = [0xff : Codes.Exit];
> /*END_CODE*/
> 
> You are able to select the right values using the Codes enumeration.
> 
> Regards,
> Sjoerd
> 
> Asaf Karagila wrote:
> 
>> i feel so stupid :)
>> i forgot to remove the const from the array declaration when i changed it to an associative array..
>>
>> - Asaf.
>>
>>
>> "Asaf Karagila" <kas1@netvision.net.il> wrote in message news:cpeolu$1vjf$1@digitaldaemon.com...
>>
>>> Hi,
>>> i was trying to initialize a list of strings (related to my previous post about assembling bytecode) into an associative array,
>>> i got the following error message "null is not an lvalue"
>>> the array declaration is
>>>    const ubyte[char[]] mnemonics;
>>>
>>> this is an example for one of the lines i used to initialize the array:
>>>
>>>   mnemonics["EXIT"]=cast(ubyte)0xFF;
>>>
>>> any ideas ?
>>>
>>> - Asaf.
>>>
>>
>>
>>

On Sat, 11 Dec 2004 16:05:23 +0100, Sjoerd van Leent <svanleent@wanadoo.nl> wrote:

> Correction:
>
> public enum Codes {Exit = 0xff};
>
> This is sufficient.
>
<snip>

Except he probably wants to be reading strings. An AA is the easiest way to do
that by far. Doing this with a Key Value pair array is the only way I can think
of doing this without an AA involved.

struct code {char[] name; ubyte value};

const code[] codemap = {{"EXIT", 0xFF}, {"SOMETHING ELSE", 0x3E}};

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