Re: default instance for IsString

On Tue, Apr 24, 2012 at 02:14, J. Garrett Morris wrote:

On Mon, Apr 23, 2012 at 11:10 PM, Yitzchak Gale wrote:

...

This is true; the use of polymorphism for numeric literals is also unsound.

By this logic, head is "unsound", since head [] throws an error.

Oddly enough, it's actually widely recognized that non-total functions like `head` pose problems. it still remains that string (or indeed numeric) literals are not expected to cause runtime exceptions. -- brandon s allbery allbery.b@gmail.com wandering unix systems administrator (available) (412) 475-9364 vm/sms