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I'm making a trace function block meant to be used with our HMI.
Amongst other things, I need to pass a trigger variable and what to trace.
The problem is that these variables could be of any base type, unknown to me at design time.
From my understanding, I can only declare a pointer to a specific base type.
I could ofc make a struct with one pointer of each base type and then have another variable stating what type is used, but surely there must be a better way of doing this?
How can I solve this in a nice way?
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Create a union of the various pointer types instead of a structure. You may also want to consider using REFERENCE instead of POINTER; it may or may not be easier to use dending on your specific usage.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
I'm making a trace function block meant to be used with our HMI.
Amongst other things, I need to pass a trigger variable and what to trace.
The problem is that these variables could be of any base type, unknown to me at design time.
From my understanding, I can only declare a pointer to a specific base type.
I could ofc make a struct with one pointer of each base type and then have another variable stating what type is used, but surely there must be a better way of doing this?
How can I solve this in a nice way?
Create a union of the various pointer types instead of a structure. You may also want to consider using REFERENCE instead of POINTER; it may or may not be easier to use dending on your specific usage.