Marking a struct as constant results in "object undeclared" error

[Alex_Kolesen]

Hello. I was wondering if it is possible to declare structs as constant in AS? If I try to do so it results in compilation failure stating that the struct is undeclared.
Here is a minimal example of how to replicate the problem.
Types.typ file:

TYPE
	TestConstStruct : 	STRUCT 
		value1 : DINT;
		value2 : DINT;
	END_STRUCT;
END_TYPE

Variables.var file:

VAR CONSTANT
	test_struct : TestConstStruct := (value1:=10,value2:=20);
END_VAR
VAR
	test_var : DINT;
	test_struct2 : TestConstStruct := (value1:=10,value2:=20);
END_VAR

Main.c file:

#include <bur/plctypes.h>

#ifdef _DEFAULT_INCLUDES
	#include <AsDefault.h>
#endif

void _INIT ProgramInit(void)
{

}

void _CYCLIC ProgramCyclic(void)
{	
	test_var = test_struct.value1;
}

void _EXIT ProgramExit(void)
{

}

I used table view to declare the variables so .var and .typ files were generated by AS. The only difference between test_struct and test_struct2 is that I marked test_struct as constant. test_struct2 can be used just file but using test_struct result in compilation error:

149 Error: ‘test_struct’ undeclared (first use in this function);

[valerio.manenti]

Hi @Alex_Kolesen ,
I don’t think you can define a structure variable as a constant inside the .var table, but there are other members in the community with much more coding knowledge than me.

Double check the Limitations when declaring PLC variables and data types in ANSI C

Is it ok for you the classic const struct declaration in ANSI C?

Ciao
Valerio