============================= isnum.d
import std.stdio ;
import std.string ;
void main(string[] args) {
  for(int i = 1 ; i< args.length ; i++)
    writefln("\"%s\" is%s a numeric.", args[i], isNumeric(args[i], true)? "": " not") ;
}
============================= output
>isnum.exe 9.9e+99 99e+9.9 9.9e+9.9
"9.9e+99" is a numeric.
"99e+9.9" is a numeric.
"9.9e+9.9" is not a numeric.

The last one should give affirmative.

badmadevil <badmadevil@gmail.com> wrote:
> ============================= isnum.d
> import std.stdio ;
> import std.string ;
> void main(string[] args) {
>   for(int i = 1 ; i< args.length ; i++)
>     writefln("\"%s\" is%s a numeric.", args[i], isNumeric(args[i], true)? "": " not") ;
> }
> ============================= output
> >isnum.exe 9.9e+99 99e+9.9 9.9e+9.9
> "9.9e+99" is a numeric.
> "99e+9.9" is a numeric.
> "9.9e+9.9" is not a numeric.
> 
> The last one should give affirmative.

Yes, I think there is a bug, too.  Though not where you're pointing it out.  D doesn't support fractional exponents.  This means that both "99e+9.9" and "9.9e+9.9" are not numbers.

-- 
SnakE

Sergey Gromov wrote:
> badmadevil <badmadevil@gmail.com> wrote:
>> ============================= isnum.d
>> import std.stdio ;
>> import std.string ;
>> void main(string[] args) {
>>   for(int i = 1 ; i< args.length ; i++)
>>     writefln("\"%s\" is%s a numeric.", args[i], isNumeric(args[i], true)? "": " not") ;
>> }
>> ============================= output
>>> isnum.exe 9.9e+99 99e+9.9 9.9e+9.9
>> "9.9e+99" is a numeric.
>> "99e+9.9" is a numeric.
>> "9.9e+9.9" is not a numeric.
>>
>> The last one should give affirmative.
> 
> Yes, I think there is a bug, too.  Though not where you're pointing it out.  D doesn't support fractional exponents.  This means that both "99e+9.9" and "9.9e+9.9" are not numbers.
> 

ic, i check these strings with ruby eval() function
by if exception raise, and give last 2 non-numeric.

But, I also check if 9.9e99 (vs 9.9e+99)is numeric.
In ruby, it is numeric; in D isNumeric, it is not.
However, to!(real)("9.9e99") give 9.9e+99. ie. in D
> isnum2 9.9e99 99e9.9 9.9e9.9
"9.9e99" is not a numeric(9.9e+99).
"99e9.9" is not a numeric<conv error>.
"9.9e9.9" is not a numeric<conv error>.