Re: [Boost-users] [proto] char vs. int behaviour when matching

Subject: Re: [Boost-users] [proto] char vs. int behaviour when matching
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2009-09-02 17:32:11

AMDG

Dominique Devienne wrote:
> On Wed, Sep 2, 2009 at 3:51 PM, Eric Niebler<eric_at_[hidden]> wrote:
>   
>> That's where you're mistaken. char, signed char and unsigned char are 3
>> distinct types.
>>     
>
> Hi Eric. After learning about int "abcd" literals from your mpl::string post,
> I'm now learning about an integral type which is neither signed nor unsigned!
>
> (sounds like my assumption that char is an integral type might be
> wrong in fact...)
>
> Would you mind expanding a little on this, possibly with pointers to
> further info please?
>
> My naive take on char was it was either equivalent to signed char or
> unsigned char
> in a platform-specific manner, but if it's boost::is_same to neither,
> I'm confused...
>   

char is always equivalent to either signed char or unsigned char,
but it is not the same type.  It is always a distinct type.

In Christ,
Steven Watanabe