Re: Numeric constants and 'D' as an exponent

["Peter Cawley" <lua@...>]

Lua uses the C library function strtod to convert strings to numbers.
Some CRT implementations only permit 'e' and 'E' to be used to begin
the exponent (i.e. as described on
http://www.cplusplus.com/reference/clibrary/cstdlib/strtod.html ),
while others permit 'e', 'E', 'd' or 'D' to be used (i.e. the MSVC CRT
described on http://msdn.microsoft.com/en-us/library/kxsfc1ab(VS.71).aspx
)

2008/11/3 Ken Smith <kgsmith@gmail.com>:
> 5.1.3 doesn't appear to accept D or d.
>
> Lua 5.1.3  Copyright (C) 1994-2008 Lua.org, PUC-Rio
>> =tonumber('2d2')
> nil
>> =tonumber('2D2')
> nil
>> =tonumber('2e2')
> 200
>> =tonumber('2E2')
> 200
>
>
> On Mon, Nov 3, 2008 at 11:30 AM, Dave Nichols <dave.nichols@make247.co.uk>
> wrote:
>>
>> The tonumber function appears to accept a 'D' (or 'd') as the exponent
>> character as well as the documented 'E' (or 'e'). Is this intended?
>> E.g. tonumber'2d2' returns 200
>> This is version 5.1.2 but there are no patches related to this up to 5.1.4
>>
>> --
>> Regards,
>>
>> Dave Nichols
>> Match-IT Limited
>> Tel: 0845 1300 510
>> Fax: 0845 1300 610
>> mailto:dave.nichols@make247.co.uk
>> http://www.make247.co.uk
>>
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>
>