Hello!
Trying to analyze the attached code I get:
$ ghdl -a error.vhdl
error.vhdl:16:17: choice must be locally static expression
ghdl: compilation error
Here the choice is B and this is a constant! even when B is derived from
another constant it doesn't mean it can change at all.
What exactly means "locally static expression"? B looks locally static
to me, but I don't know what exactly means for GHDL.
Regards, SET
--
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Ing. Salvador Eduardo Tropea http://utic.inti.gov.ar/
INTI-Electrónica e Informática Tel: (+54 11) 4724 6315
Colectora de Av. General Paz 5445 San Martín - B1650KNA
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Buenos Aires * Argentina http://www.inti.gov.ar/
library IEEE;
use IEEE.std_logic_1164.all;
entity Bug is
end entity Bug;
architecture Example of Bug is
constant A : std_logic_vector(7 downto 0):=(others => '0');
constant B : std_logic_vector(5 downto 0):=A(5 downto 0);
signal c : std_logic_vector(5 downto 0);
begin
test:
process
begin
case c is
when B =>
null;
end case;
end process test;
end architecture Example; -- Entity: Bug
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