Re: Fwd: Compiler Guided Refactoring.

> The key aspect to the Extract Method with no arguments and void return
> value (i.e. void-void extraction) is that it minimizes the risk of
> introducing side-effects.


That is what appeals to me most about it....

However, it is steps a largish notch away from the idea... ie. Tweaking
the Declarations to Tighten the constraints enforced by the compiler.

ie. Your void-void is low risk, provided the person doing the refactoring
doesn't,,,
* accidentally reorder something,
* drop a step,
* or extract copypasta into a single method that isn't copypasta but
copypasta and tiny easily missed tweak.

I wonder if there is any way of doing a reliable cross check, or a variant
of this, or a way of injecting additional steps to increase safety.

Hmm. It might need an additional check, gcc will always inline something
like that so could diff the disassembly output.

On Sun, Jul 7, 2013 at 5:31 AM, J Arrizza <[email protected]> wrote:

> The key aspect to the Extract Method with no arguments and void return
> value (i.e. void-void extraction) is that it minimizes the risk of
> introducing side-effects.
>
> The conversion of the function parameters to consts is slightly different=
,
> its purpose is to highlight the fact that the function won't introduce a
> side-effect via those parameters.
>
> Further to this, one additional refactoring I've used is Rename Variable =
to
> add a "g" prefix to all global variables. I personally don't like hungari=
an
> notation but adding the "g" is a very useful exception to this rule. All
> the globals show up clearly in the code.
>
> One other way to achieve this is to put all globals into a single struct
> called "globals". Then all uses show up as "globals.some_variable" which
> makes it very clear that there is a global side-effect in that part of th=
e
> code. But note the compiler may generate more code for this technique.
>
> John
>
>
>
> On Thu, Jul 4, 2013 at 3:28 PM, J Arrizza <[email protected]> wrote:
>
> > On Thu, Jul 4, 2013 at 7:27 AM, Richard <[email protected]> wrote:
> >
> >> **
> >>
> >> n article <
> >> CAEyOLyBfwH6uD6Z5RxBmmne4NA90cpF6N6LGacJPmRTSz7Enyg@mail.gmail.com>,
> >> J Arrizza <[email protected]> writes:
> >>
> >> > is. IMO the biggest bang for buck is the void-void extraction.
> >>
> >> This is Extract Method/Extract Function with no arguments
> >>
> > ... and void return value.
> >
> >> > The next best is the void-const extraction.
> >>
> >
> >> This is Extract Method/Extract Function with arguments
> >>
> > ... and void return value and all the arguments are const.
> >
> >>
> >> I think it's important to use the established names for well known
> >> refactorings for clear communication.
> >>
> > Absolutely.
> >
> >>
> >>
> >>
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