Hi Patrick,
concerning your question:
-- Here if the cast is removed,
-- error is issued while trying to run ghdl with the -a option :
-- test.vhdl:xyz:7: no interface for 'theoutput' in association
theOutput => std_logic_vector(instanceMatrix(1)));
ghdl is right: the type of theOutput is std_logic_vector while the
type of instanceMatrix is myVector. As these are different types, a
type convertion (what you call a cast) is required.
You can avoid this type convertion by declaring MyVector as:
subtype myvector is std_logic_vector (size_o - 1 downto 0);
I am investigating the other point.
Tristan.
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