looks like different methods are called:
for: user=> (unchecked-multiply 25214903917 0x5DEECE66D)
this method: static public long unchecked_multiply(long x, long y){return x
* y;}
for: (unchecked-multiply seed1 0x5DEECE66D)
this method: static public Number unchecked_multiply(long x, Object
y){return multiply(x,y);}
long story short this gets called:
static public long multiply(long x, long y){
long ret = x * y;
if (y != 0 && ret/y != x)
return throwIntOverflow();
return ret;
}
On Wed, Feb 20, 2013 at 11:25 PM, John Lawrence Aspden <
aspd...@googlemail.com> wrote:
> Hi, I'm getting an unexpected exception trying to do unchecked
> arithmetic:
>
> user=> (def seed1 25214903917)
> #'user/seed1
> user=> (type seed1)
> java.lang.Long
> user=> (type 25214903917)
> java.lang.Long
> user=> (unchecked-multiply seed1 0x5DEECE66D)
> ArithmeticException integer overflow
> clojure.lang.Numbers.throwIntOverflow (Numbers.java:1388)
>
> user=> (unchecked-multiply 25214903917 0x5DEECE66D)
> 8602081037417187945
>
> Could someone explain what's going on for me?
>
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Please correct me if I'm wrong or incomplete,
even if you think I'll subconsciously hate it.
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