[ Arithmetic | The ECLiPSe Built-In Predicates | Reference Manual | Alphabetic Index ]
\(+Number, ?Result)
Evaluates the bitwise complement of Number and unifies the resulting value
with Result.
- +Number
- Integer.
- ?Result
- A variable or integer.
Description
This predicate is used by the ECLiPSe compiler to expand evaluable
arithmetic expressions. So the call to \(Number, Result) is equivalent
to
Result is \Number
which should be preferred for portability.
In coroutining mode, if Number is a free variable, the call to \/2 is
delayed until this variable is instantiated.
Fail Conditions
Fails if the result of the evaluation does not unify with Result.
Resatisfiable
No
Exceptions
- (4) instantiation fault
- Number is not instantiated (non-coroutining mode only).
- (5) type error
- Result is a number but not an integer.
- (5) type error
- Number is a number but not an integer.
- (24) number expected
- Number is not of a numeric type.
- (24) number expected
- Result is neither a number nor a variable.
Examples
Success:
\(1, -2).
\(5, Result). (gives Result = -6)
\(-6, Result). (gives Result = 5)
Fail:
\(1, 0).
Error:
\(A, 6). (Error 4).
\(0.0, 0.0). (Error 5).
\(4 + 2, -7). (Error 24).
\(1, r). (Error 24).
See Also
is / 2