Re: [patch, fortran] Handling of .and. and .or. expressions

["N.M. Maclaren" <nmm1 at cam dot ac dot uk>]

On Jun 28 2018, Toon Moene wrote:
> And - most interesting - that's how Fortran 77 formulated it (way before 
> PURE/IMPURE functions entered the language):
>
> "6.6.1 Evaluation of Operands
>
> It is not necessary for a processor to evaluate all of the operands of 
> an expression if the value of the expression can be determined 
> otherwise. ...

Or even Fortran 66 :-)

6.4 Evaluation of Expressions.  A part of an expression need be evaluated
only if such action is necessary to establish the value of the expression.
... When two elements are combined by an operator, the order of evaluation
of the elements is optional.  ...

Regards,
Nick Maclaren.