SA0059: Comparison operations always returning TRUE or FALSE

Detects comparisons with literals whose result is always TRUE or FALSE, and can already be processed during at the compile.

Justification: An operation that consistently yields TRUE or FALSE is an indication of a programming error.

Importance: High

PROGRAM PLC_PRG
VAR
    byTemp1 : BYTE;
END_VAR

WHILE byTemp1 <= 255 DO
    byTemp1 := byTemp1 + 1;
END_WHILE