SA0078: Missing CASE branches

Function

Determines CASE statements without cases, i.e. with only a single ELSE statement.

Reason

A CASE statement without cases wastes execution time and is difficult to read.

Importance

Medium

Sample:

PROGRAM MAIN
VAR
    nVar   : DINT;
    bVar   : BOOL;
END_VAR
nVar := nVar + INT#1;
 
CASE nVar OF                     // => SA0078 
ELSE
    bVar := NOT bVar;
END_CASE