[Issue 4673] New: Bug in std.string (isNumeric)

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http://d.puremagic.com/issues/show_bug.cgi?id=4673

           Summary: Bug in std.string (isNumeric)
           Product: D
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: nobody at puremagic.com
        ReportedBy: petitv.isat at gmail.com


--- Comment #0 from Petit Vincent <petitv.isat at gmail.com> 2010-08-18 12:08:20 CEST ---
Created an attachment (id=725)
Source code (from description)

Hi. I was doing some recursivity with D and I probably found a bug with the
isNumeric() function.


Here's the source code (also in attach) :

import std.stdio;
import std.string;
import std.conv;

int main(string[] args)
{
    if(args.length > 1)
    {
        int number;

        foreach(item; args)
        {
            if(isNumeric(item))
            {
                number = parse!(uint)(item);    // seems to have a bug with 'L'
and 'F' values
                writeln("Facto of ", number, " is ", facto(number));
            }
        }
    }
    else
    {
        writeln("You must specified a number.");
    }
    return 0;
}


uint facto(uint number)
{
    uint result;

    if(number <= 1)
    {
        result = 1;
    }
    else
    {
        result = number * facto(number - 1);
    }
    return result;
}




See the result when running the compiled executables with these args : 5 8 A F

>facto 5 8 A F
Facto of 5 is 120
Facto of 8 is 40320
std.conv.ConError : std.conv(1070) : Can't convert 'F' of type string to type
uint


It seems that "F" and "L" alone are recognized as Float and Long specifier but
... there's no digit. I accept that 0F, 1L are digits but F and L alone are
not.

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