Enumerated attributes with same name

# 8 years ago
sriggi	Dear all, a simple question on enumerated attributes. Since it is not possible to add new states other than the predefined ones (14 states) (i.e. see this post) I would like to use enum attributes to define a state parameter with "unconventional" name (unfortunately I must adopt such names without re-mapping to the TANGO predefined states). My question is: is it possible to have two or more enum attributes within a device server having the same labels? For example: stateParam1 {OK,DEGRADED,OFFLINE} stateParam2 {OK,DEGRADED} The compiler complains a label redeclaration. Do you have suggestions? Cheers, Simone ************************************************************** Simone Riggi INAF, Osservatorio Astrofisico di Catania Via S. Sofia 78 95123, Catania - Italy phone: +39 095 7332 extension 282 e-mail: simone.riggi@gmail.com, sriggi@oact.inaf.it skype: simone.riggi **************************************************************

# 8 years ago

Dear all,

a simple question on enumerated attributes.
Since it is not possible to add new states other than the predefined ones (14 states) (i.e. see this post)
I would like to use enum attributes to define a state parameter with "unconventional" name (unfortunately I must adopt such names without re-mapping to the TANGO predefined states).

My question is: is it possible to have two or more enum attributes within a device server having the same labels? For example:

stateParam1 {OK,DEGRADED,OFFLINE}
stateParam2 {OK,DEGRADED}

The compiler complains a label redeclaration.
Do you have suggestions?

Cheers,

Simone

****************************************************************
Simone Riggi
INAF, Osservatorio Astrofisico di Catania
Via S. Sofia 78
95123, Catania - Italy
phone: +39 095 7332 extension 282
e-mail: simone.riggi@gmail.com,
sriggi@oact.inaf.it
skype: simone.riggi
****************************************************************

# 8 years ago
Manu	Hi Simone, Because you are talking about compiler pb, I assume your Tango class is C++. If you use the C++ 11 way of enum declaration, you can have the same label several times. `enum class _FirstEnum { FIRST = 0, SECOND }; typedef _FirstEnum FirstEnum; enum class _SecondEnum { FIRST = 0, SECOND }; typedef _SecondEnum SecondEnum;` Then use enum label like FirstEnum::FIRST or SecondEnum::FIRST Hoping this help Emmanuel

# 8 years ago

Manu

Hi Simone,

Because you are talking about compiler pb, I assume your Tango class is C++.
If you use the C++ 11 way of enum declaration, you can have the same label several times.


enum class _FirstEnum
{
	FIRST = 0,
	SECOND
};
typedef _FirstEnum FirstEnum;

enum class _SecondEnum
{
	FIRST = 0,
	SECOND
};
typedef _SecondEnum SecondEnum;

Then use enum label like FirstEnum::FIRST or SecondEnum::FIRST

Hoping this help

Emmanuel

# 8 years ago
sriggi	Dear Emmanuel, thanks a lot. It works. Pogo regenerates that piece of code every time, but the rest is fine. Cheers, Simone ************************************************************** Simone Riggi INAF, Osservatorio Astrofisico di Catania Via S. Sofia 78 95123, Catania - Italy phone: +39 095 7332 extension 282 e-mail: simone.riggi@gmail.com, sriggi@oact.inaf.it skype: simone.riggi **************************************************************

# 8 years ago

sriggi

Dear Emmanuel,

thanks a lot. It works. Pogo regenerates that piece of code every time, but the rest is fine.

Cheers,

Simone

# 8 years ago
sriggi	Dear Manu, after long time, I forgot to add to the previous question that, as suggested in the User Guide examples (pag. 163), I needed to add a ": short" in your enum class definition: `enum class _FirstEnum : short { FIRST = 0, SECOND }; typedef _FirstEnum FirstEnum;` otherwise I get this error while reading the attribute: Invalid enumeration type. Supported types are C++11 scoped enum with short as underlying data type or old enum Thanks again, Simone ************************************************************** Simone Riggi INAF, Osservatorio Astrofisico di Catania Via S. Sofia 78 95123, Catania - Italy phone: +39 095 7332 extension 282 e-mail: simone.riggi@gmail.com, sriggi@oact.inaf.it skype: simone.riggi **************************************************************

# 8 years ago

sriggi

Dear Manu,
after long time, I forgot to add to the previous question that, as suggested in the User Guide examples (pag. 163), I needed to add a ": short" in your enum class definition:


enum class _FirstEnum : short
{
	FIRST = 0,
	SECOND
};
typedef _FirstEnum FirstEnum;

otherwise I get this error while reading the attribute:

Invalid enumeration type. Supported types are C++11 scoped enum with short as underlying data type or old enum

Thanks again,

Simone