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This function converts an enumerated value into an integer value associated to the enumerated value.
Related keyword:
| enum2int(in Enumerated_type inpar) return integer | 
The actual parameter passed to inpar always shall be a typed object.
Example:
	
		type enumerated MyFirstEnumType { 
			   Monday, Tuesday, Wednesday, Thursday, Friday
		};
 
    
 
		type enumerated MySecondEnumType {
			   Saturday(-3), Sunday (0), Monday
		};
		//within a dynamic language element:
		var MyFirstEnumType vl_FirstEnum := Monday;
		var MySecondEnumType vl_SecondEnum := Monday;
		
		enum2int(vl_FirstEnum) // returns 0
		enum2int(vl_SecondEnum) // returns 1
		
		vl_FirstEnum := Wednesday;
		vl_SecondEnum := Saturday;
		enum2int(vl_FirstEnum) // returns 2
		enum2int(vl_SecondEnum) // returns -3
		
		vl_FirstEnum := Friday;
		vl_SecondEnum := Sunday;
		enum2int(vl_FirstEnum) // returns 4
		enum2int(vl_SecondEnum) // returns 0