function to generic

function to generic

[kotee]

hi all

i write my own data type, but i need an "=" operator for it.
i know that generic packages can get functions as
parameter. how it works exactly? i try to find out
from ref guides, but i don't find it. :((
thanks

kotee

Re: function to generic

[Preben Randhol]

On 12 Nov 2001 19:48:45 +0100, kotee@ludens.elte.hu wrote:
> hi all
> 
> i write my own data type, but i need an "=" operator for it.
> i know that generic packages can get functions as
> parameter. how it works exactly? i try to find out
> from ref guides, but i don't find it. :((

Don't read ref. books, read a text on Ada book. Here are some online.

http://www.it.bton.ac.uk/staff/je/adacraft/
http://burks.bton.ac.uk/burks/language/ada/ada95.pdf

http://www.adapower.com/learn/adadistilled.html

Preben

Re: function to generic

[kotee]

In article <slrn9v0b3e.5h0.randhol+abuse@kiuk0156.chembio.ntnu.no>, Preben Randhol <randhol+abuse@pvv.org> writes:
> On 12 Nov 2001 19:48:45 +0100, kotee@ludens.elte.hu wrote:
>> hi all
>> 
>> i write my own data type, but i need an "=" operator for it.
>> i know that generic packages can get functions as
>> parameter. how it works exactly? i try to find out
>> from ref guides, but i don't find it. :((
> 
> Don't read ref. books, read a text on Ada book. Here are some online.
> 
> http://www.it.bton.ac.uk/staff/je/adacraft/
> http://burks.bton.ac.uk/burks/language/ada/ada95.pdf
> 
> http://www.adapower.com/learn/adadistilled.html
> 
> Preben

thanks a lot, i found what i need!

kotee

Re: function to generic

[Matthew Heaney]

<kotee@ludens.elte.hu> wrote in message news:0KJ+h2G3o9zP@ludens...
> hi all
>
> i write my own data type, but i need an "=" operator for it.

Do you mean assignment, or a test for equality?  I assume you mean test for
equality:

package P is

   type T is limited private;
   function "=" (L, R : T) return Boolean;
...
end P;

> i know that generic packages can get functions as
> parameter. how it works exactly? i try to find out
> from ref guides, but i don't find it. :((

Is your package generic?  Do you want to declare a generic formal
subprogram?

generic
   type Element_Type is private;
   with function "=" (L, R : Element_Type) return Boolean is <>;
package GP is ...