[boost] Re: Re: Re: [iostreams] Major interace changes planned -- comments requested

From: Jonathan Turkanis (technews_at_[hidden])
Date: 2005-03-09 19:28:23

Matthew Vogt wrote:
>> Suppose you write a filter which expect ASCII characters. You might
>> want to
>> perform arithmetic operations on characters, e.g.
>>
>>     if (c >= 65 && c < 91)
>>         c += 32; // Convert to lowercase.
>>
>
> Surely this is something you would want to discourage?

Why? I think it's usually discouraged because people should generally use
locales. But if you're writing, e.g., a base64 encoder, the exact numerical
values are important. I think this will be true enough of the time that I want
people to be able to write c+= 32.

Jonathan