unconstrained args for procedures

[Olaf Petzold]

Hi,

this time a question to unconstrained args for procedures. Is there a
way to write it something like:

package oo is
procedure foo (
signal a, b : in std_logic_vector(natural range <>);
....

package body oo is

procedure foo(
signal a, b : std_logic_vector(natural range <>);
...) is
constant WIDTH : natural := a'range;
...
begin
...

I got syntax errors. Imo there is no reasing why isn't possible.

Thank you
Olaf

 

[Olaf Petzold]

Hi,

this time a question to unconstrained args for procedures. Is there a
way to write it something like:

package oo is
procedure foo (
signal a, b : in std_logic_vector(natural range <>);
....

package body oo is

procedure foo(
signal a, b : std_logic_vector(natural range <>);
...) is
constant WIDTH : natural := a'range;
...
begin
...

I got syntax errors. Imo there is no reasing why isn't possible.

Wow, it's easy - even leave the range specs empty. Unfortunally vsim
crashs on accessing a's range:

generating 'RANGE in gen_attr()
** Fatal: Unexpected signal: 11.

Regards,
Olaf

 

[Andy Peters]

Hi,

this time a question to unconstrained args for procedures. Is there a
way to write it something like:

package oo is
procedure foo (
signal a, b : in std_logic_vector(natural range <>);
....

Drop the (natural range <>) part.

Simply declare it as std_logic_vector.

-a