Message du 05/05/11 19:48 De : "Stewart, Robert" A : "'boost@lists.boost.org'" Copie à : Objet : Re: [boost] [review] string convert
Vicente BOTET wrote:
are we discussing here a generic interface from type-to-type or one that uses an intermediary stream to make the conversion?
I've been considering it the former. Why does using a stream to make the conversion affect that?
The fact that we want to add some formatting parameters, apply manipulators and so on to a generic interface disturb me.
- T convert_cast(S, formatting = none); can throw - T convert_cast(S, T, formatting = none) - optional name_me_1(S, formatting = none) - optional name_me_1(S, T, formatting = none) - pair name_me_2(S, T, formatting = none)
I would prefer to don't pay for these defaulted parameters in the generic case. Maybe I'm wrong, but the manipulators are only useful when converting from a string or to a string. If this is the case, all the stream stuff should be moved to a string conversion interface. I would even prefer that the stream part stay away and independent. In another post I proposed to use an istream proxy when converting from a string to a type as_istream(str) >> std::hex >> i; For conversions from a type to a string, we can use an ostream proxy, which is implicitly convertible to string. string str = as_ostream() << std::hex << i; Best, Vicente