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fix(+Number, ?Result)
Unifies the integer part of Number with Result (Truncation towards zero).
- +Number
- A number.
- ?Result
- A variable or integer.
Description
This predicate is used by the ECLiPSe compiler to expand evaluable
arithmetic expressions. So the call to fix(Number, Result) is
equivalent to
Result is fix(Number)
which should be preferred for portability.
In coroutining mode, if Number is a free variable, the call to fix/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.
- (24) number expected
- Number is not of a numeric type.
- (24) number expected
- Result is neither a number nor a variable.
Examples
Success:
fix(1.5, 1).
fix(-6.4, -6).
Fail:
fix(1, 0).
Error:
fix(A, 6.0). (Error 4).
fix(0.0, 0.0). (Error 5).
fix(4 + 2.3, 6). (Error 24).
fix(1, r). (Error 24).
See Also
is / 2