Re: [boost] [conversion] try_lexical_cast and 200$

On 12/12/2013 4:31 PM, Matt Calabrese wrote:

On Thu, Dec 12, 2013 at 4:12 PM, Eric Niebler wrote:

...

On 12/12/2013 9:35 AM, Matt Calabrese wrote:

...

A little hackish, but:

http://codepaste.net/py5ot3

template< class T, int = 0, class S > boost::optional<T> lexical_cast( S const&, std::nothrow_t );

Is that even legal?! A non-defaulted template parameter after a defaulted one? <boggle> How will this fare on older compilers, I wonder.

Yeah. I think it's worked on GCC and Clang ever since they've supported defaults for function template parameters, but I could be mistaken. I don't know about other compilers.

Then well done. This would be my preferred interface for C++11. But what to do about older compilers? It's certainly a problem. -- Eric Niebler Boost.org http://www.boost.org