[ Arithmetic | The ECLiPSe Built-In Predicates | Reference Manual | Alphabetic Index ]
# \/(+Number1, +Number2, -Result)

Evaluates the bitwise disjunction Number1 \/ Number2 and unifies the
resulting value with Result.
*Number1*
- Integer.
*Number2*
- Integer.
*Result*
- A variable or integer.

## Description

This predicate is used by the ECLiPSe compiler to expand evaluable
arithmetic expressions. So the call to \/(Number1, Number2, Result) is
equivalent to
Result is Number1 \/ Number2

which should be preferred for portability.
This operation behaves as if operating on an unlimited length two's
complement representation.

In coroutining mode, if Number1 or Number2 are uninstantiated, the call
to \//3 is delayed until these variables are instantiated.

### Modes and Determinism

### Exceptions

*(4) instantiation fault *
- Number1 or Number2 is not instantiated (non-coroutining mode only).
*(5) type error *
- Result is a number but not an integer.
*(5) type error *
- Number1 or Number2 is a number but not an integer.
*(24) number expected *
- Number1 or Number2 is not of a numeric type.
*(24) number expected *
- Result is neither a number nor a variable.

## Examples

Success:
\/(11, 7, 15).
\/(11, -7, Result). (gives Result = -5)
Fail:
\/(1, 2, 4).
Error:
\/(A, 2, 6). (Error 4).
\/(6, 2.0, 6.0). (Error 5).
\/(4 + 2, 2, 6). (Error 24).
\/(5, 2, r). (Error 24).

## See Also

is / 2