SA0134: Explicit signed/unsigned conversions

Function	Determines explicitly performed conversions from signed to unsigned data types or vice versa.
Reason	Excessive use of type conversions may mean that incorrect data types have been selected for variables. There are therefore programming guidelines that require an explicit justification for data type conversions.
Importance	Low

Samples:

PROGRAM MAIN
VAR
    nBYTE    : BYTE;
    nUDINT   : UDINT;
    nULINT   : ULINT;
    nWORD    : WORD;
    nLWORD   : LWORD;
    nSINT    : SINT;
    nINT     : INT;
    nDINT    : DINT;
    nLINT    : LINT;
END_VAR

nLINT  := ULINT_TO_LINT(nULINT); // => SA0134
nUDINT := DINT_TO_UDINT(nDINT);  // => SA0134
nSINT  := BYTE_TO_SINT(nBYTE);   // => SA0134
nWORD  := INT_TO_WORD(nINT);     // => SA0134
nLWORD := SINT_TO_LWORD(nSINT);  // => SA0134