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SA0025: Unqualified enumeration constants

Detects enumeration constants for which a qualified name does not prepend the enumeration

Justification: Qualified access makes the code more readable and easier to maintain. Without the forcing of qualified variable names, an additional enumeration could be inserted when the program is extended. This enumeration contains a constant with the same name as an existing enumeration (see the example below: "red"). This would result in ambiguous access to this piece of code.

In every case, we recommend to use only enumerations with the pragma {attribute 'qualified-only'}.

Importance: Medium

Example 37. Example
TYPE COLOR :
    (red,
    green,
    blue);
END_TYPE
PROGRAM PLC_PRG
VAR
    myColor : COLOR;
END_VAR

myColor := COLOR.red;    // OK
myColor := red;    // SA0025

Output in the Messages view:

  • sa_icon_message.png SA0025: Enumeration constant 'red' not qualified



For more information, see:

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