On Fri, Jun 18, 2010 at 2:49 PM, Rich Hickey <richhic...@gmail.com> wrote:
> This L suffix idea is a non-starter. Here's why:
>
> We're in a reader based language. The reader reads objects. When the reader
> reads 42, it must return an object. It cannot return an int or a long
> primitive. Right now, it returns an Integer. I've also conducted experiments
> where it returned a Long. Certainly 42000000000 will be a Long. What
> different thing would the reader return given 42L, or 42000000000L? Given an
> int 42 what should the printer print? And long 42, Long 42? Would (= 42L
> (read-string (pr-str 42L)))?

But what if the reader reads 42 as a BigInteger (or an alternative
implementation) and 42L as a Long?
then you should be able to tell them apart.

I agree with the goals of the num branch, I'm just unconvinced by the
reader defaulting to Long for integer literals.

Christophe

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