Error passing type access to function in VHDL

问题

I have a record in VHDL that contains a pointer (access). I need to create a function that receives this record as parameter and from its data write in a file.

But simulating with MODELSIM I get the following error:

**Error: (vcom-1462) Illegal declaration of constant "xxx" of type x_file_format (type is or contains access type).

How can I pass a pointer as parameter to a function?

回答1:

Function parameters can only be constant (or signal or file) inputs. Access types must be variables. Therefore you must write a procedure to do it, with the access type passed in as a variable.

Procedure proc ( variable ptr : someAccessType ) is

来源：https://stackoverflow.com/questions/53694255/error-passing-type-access-to-function-in-vhdl