Re: [boost] Variadic append for std::string

Subject: Re: [boost] Variadic append for std::string
From: Christof Donat (cd_at_[hidden])
Date: 2017-01-25 12:44:33

Hi,

Am 25.01.2017 18:37, schrieb Richard Hodges:
>> The string factories, of course need more than only begin() and end().
>> They also have to provide a way to estimate the size of the output, 
>> because
>> we want to be able to allocate the complete buffer upfront. In the 
>> naive
>> implementation I called that size().
> 
> If you have size(), it means you know the size because the conversion 
> work
> has already been done.

I think, it is fine, if it returns a reasonable upper bound, like e.g. 4 
for a 16 bit value in hex representation. It is just meant, to make 
sure, that we can allocate enough memory upfront, and avoid calls to 
realloc().

Christof