There has been some debate at work about using the merits of using the alternative spellings for C/C++ logical operators in iso646.h:

and        &&
and_eq     &=
bitand     &
bitor      |
compl      ~
not        !
not_eq     !=
or         ||
or_eq      |=
xor        ^
xor_eq     ^=

According to Wikipedia, these macros facilitate typing logical operators in international (non-US English?) and non-QWERTY keyboards. All of our development team is in the same office in Orlando, FL, USA and from what I have seen we all use the US English QWERTY keyboard layout; even Dvorak provides all the necessary characters.

Supporters of using the iso646.h macros claim we should them because they are part of the C and C++ standards. I think this argument is moot since digraphs and trigraphs are also part of these standards and they are not even supported by default in many compilers.

My rationale for opposing these macros in our team is that we do not need them since:

• Everybody on our team uses the US English QWERTY keyboard layout;
• C and C++ programming books from the US barely mention iso646.h, if at all; and
• new developers may not be familiar with iso646.h (this is expected if they are from the US).

/rant

Finally, to my set of questions:

• Does anyone in this site use the iso646.h logical operator macros? Why?
• What is your opinion about using the iso646.h logical operator macros in code written and maintained on US English QWERTY keyboards?
• Is my digraph and trigraph analogy a valid argument against using iso646.h with US English QWERTY keyboard layouts?

EDIT:

I missed two similar questions in StackOverflow:

• Is anybody using the named boolean operators?
• Which C++ logical operators do you use: and, or, not and the ilk or C style operators? why?