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The bitor operator is an alternative representation of the | operator (bitwise OR).
bitor takes integer or enumeration operands. bitor may pass two or more arguments. These arguments must be character or numeric.
When coded as a keyword, bitor can only pass two arguments. In either case, the result type is the same as the arguments: (1) unsigned if all arguments are unsigned, or (2) an integer.
In order to use the bitor operator, you need to check the Enable new operator names option (the -VM compiler switch, available on the C++ Compiler Compatibility page of the Project > Options dialog box).