Fraction class prototype and test (not to be committed).

Fraction class prototype and test (not to be committed).

[regis, 2016-05-23 22:28:49]

regis@google.com changed reviewers:
+ asiva@google.com, hausner@google.com, iposva@google.com

[regis, 2016-05-23 22:28:50]

This is a working experiment showing how to wire a new numerical type extending
num in the VM.

More work would be required to test and optimize this new class before
submitting it.

I am setting this aside and will now work on a Pixel type (scaled decimal) for
Flutter.

Comments are welcome.

[Cutch, 2016-05-24 14:31:00]

On 2016/05/23 22:28:50, regis wrote:
> This is a working experiment showing how to wire a new numerical type
extending
> num in the VM.
> 
> More work would be required to test and optimize this new class before
> submitting it.
> 
> I am setting this aside and will now work on a Pixel type (scaled decimal) for
> Flutter.
> 
> Comments are welcome.

I have a high level question:

Why does this type have to extend from num? Why can't it be a distinct numeric
type like Float32x4?

[regis, 2016-05-24 16:44:01]

On 2016/05/24 14:31:00, Cutch wrote:
> On 2016/05/23 22:28:50, regis wrote:
> > This is a working experiment showing how to wire a new numerical type
> extending
> > num in the VM.
> > 
> > More work would be required to test and optimize this new class before
> > submitting it.
> > 
> > I am setting this aside and will now work on a Pixel type (scaled decimal)
for
> > Flutter.
> > 
> > Comments are welcome.
> 
> I have a high level question:
> 
> Why does this type have to extend from num? Why can't it be a distinct numeric
> type like Float32x4?

I did not give it a lot of thoughts, but it seemed natural to be able to do
arithmetic with other numerical types. e.g. multiply a fraction by 10. I suppose
that more optimizations would be possible by keeping the type separate, at the
cost of flexibility. Is it why you are asking? It is a good question we can
raise with the Flutter team when implementing a Pixel type.

[Cutch, 2016-05-24 16:45:28]

On 2016/05/24 16:44:01, regis wrote:
> On 2016/05/24 14:31:00, Cutch wrote:
> > On 2016/05/23 22:28:50, regis wrote:
> > > This is a working experiment showing how to wire a new numerical type
> > extending
> > > num in the VM.
> > > 
> > > More work would be required to test and optimize this new class before
> > > submitting it.
> > > 
> > > I am setting this aside and will now work on a Pixel type (scaled decimal)
> for
> > > Flutter.
> > > 
> > > Comments are welcome.
> > 
> > I have a high level question:
> > 
> > Why does this type have to extend from num? Why can't it be a distinct
numeric
> > type like Float32x4?
> 
> I did not give it a lot of thoughts, but it seemed natural to be able to do
> arithmetic with other numerical types. e.g. multiply a fraction by 10. I
suppose
> that more optimizations would be possible by keeping the type separate, at the
> cost of flexibility. Is it why you are asking? It is a good question we can
> raise with the Flutter team when implementing a Pixel type.

Yes, that's why I'm asking