Is there any way to get the name and type of current variable in runtime.

for example

myDINT: DINT;
myCurrentVariableName: STRING;

myCurrentVariableName := toString(myDINT); ( myCurrentVariableName would equal "myDINT" )

if TYPE(myDINT) = DINT then
( True if variable is DINT )
endif

Hi,
to get the type of a variable you can use conditional pragmas:

PROGRAM POU
VAR
   iMyValue      : INT;
   xIsInteger      : BOOL;
END_VAR

{IF (hastype(variable : iMyValue, INT))}
   xIsInteger := TRUE;
{END_IF}

To get the name of a variable you can try the attribute ```

'parameterstringof'

``` But as far as I know this is only working inside visualizations.

By the way, would be nice from 3S to release documentation on type independent numeric variables ANY_NUM....
I know, this must work internally.... And sometimes it's useful when developing more or less generic FBs, libraries....

Also, I've noticed, that some functions (MIN, MAX) can receive more than 2 parameters in ST?

How to declare such user functions?

P.

These are really CoDeSys internals... but this features are making things elegant and excellent....

jzhvymetal hat geschrieben:
Is there any way to get the name and type of current variable in runtime.
for example
myDINT: DINT;
myCurrentVariableName: STRING;
myCurrentVariableName := toString(myDINT); ( myCurrentVariableName would equal "myDINT" )
if TYPE(myDINT) = DINT then
( True if variable is DINT )
endif

Try to search for "{attribute reflection}" and "{attribute instance-path}".
This works for FB instances... I quote online help....

{attribute 'reflection'} 
FUNCTION_BLOCK POU 
VAR 
{attribute 'instance-path'} 
{attribute 'noinit'} 
str: STRING; 
END_VAR 

In the main program PLC_PRG an instance myPOU of function block POU is called:

PROGRAM PLC_PRG 
VAR 
myPOU:POU; 
myString: STRING; 
END_VAR 
myPOU(); 
myString:=myPOU.str; 

And... you can always check an FB instance for interface compatibility....
(instead of types)

Hi Strucc,
he was asking for variable instances not for FB instances. That's why I did not offer this instance-path stuff

But anyway, you're right:
An official support of ANY_NUM would be great

And if I could add this to my whishlist:
OVERLOADING of methods!!!!

singleton hat geschrieben:
Hi Strucc,
he was asking for variable instances not for FB instances. That's why I did not offer this instance-path stuff
But anyway, you're right:
An official support of ANY_NUM would be great
And if I could add this to my whishlist:
OVERLOADING of methods!!!!

I want to raise my hand also for overloading. Also I wish CoDeSys would give more document how to use the following types:

ANY
ANY_DERIVED
ANY_ELEMENTARY
ANY_MAGNITUDE
ANY_BIT
ANY_STRING
ANY_DATE
ANY_NUM
ANY_REAL
ANY_INT