Shadowing of members

[Jonathan M Davis]

On Thursday, January 10, 2013 03:56:10 bearophile wrote:
> comco:
> > I won't like this code:
> > class Pu {
> > 
> > int a, b;
> > this(int a, int b) {
> > 
> > this.a = a;
> > this.b = b;
> > 
> > }
> > 
> > }
> > 
> > to issue warnings for a and b.
> 
> That's a nice warning to have, because that's bug-prone code,
> worth avoiding.

So, basically, you want the compiler to yell at you for picking a bad variable 
name? There's _nothing_ to warn about in the code above. It's perfectly valid. 
I could see warning if you did

this.a = this.a;

or

a = a;

but

this.a = a;

is perfectly valid. And it would be _really_ annoying to not be able to give 
constructor parameters the same names as the member variables that they're 
used to set. Their names will typically differ be a _ if the member variables 
are private, but for POD types, they're almost certainly going to be 
identical, and warning about that would just be stupide.

- Jonathan M Davis