Why can't I increment this `std_logic_vector`

Question

What\'s going on here? Why am I getting an \'operator argument type mismatch\', and what can I do to fix it?

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-- 32-bit counter with enable and async reset         


        

Answer 1

This will also work:

nextvalue <= value + '1'; 

Dont know if you are really well versed in VHDL. The following syntax ist logicaly correct if you are using std_logic_arith package