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entity foo is
end foo;
use std.textio.all;
architecture only of foo is
signal clock : bit;
begin -- only
process (clock)
variable x : integer := 0;
variable l : line;
begin -- process
write( l, string'( "x = " ) );
write( l, x );
writeline( output, l );
x := x + 1;
end process;
process
begin -- process
clock <= '1' after 1 ns,
'0' after 2 ns,
'1' after 3 ns;
wait;
end process;
end only;
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