Eric Niebler wrote:
On 10/27/2010 2:46 PM, Stiles Watson wrote:
I'm a new to metaprogramming so please bare with the stupid questions:
I have a requirement to convert string literals to a specified format at compile-time. In otherwords, given a literal like "3A689", I need to verify the value and, if not valid, generate a correct value such that:
//pseudocode const char ch[] = verify<"3A689">::valid_value;
would result in something like:
const char ch[] = "03A689X";
Can I use Boost to write a template to do this?
I know that is extremely vague, but does anyone have any thoughts?
Use mpl::string:
http://www.boost.org/doc/libs/1_44_0/libs/mpl/doc/refmanual/string.html
You might find the interface less than ideal. C++ doesn't allow strings as template parameters.
Thanks Eric. Question. For the example given at the link above, it has typedef mpl::string<'hell','o wo','rld'> hello; Why would it not be typedef mpl::string<'h','e','l','l','o',' ','w','o','r','l','d'> hello; OR if the example is correct, why could you not simply do typedef mpl::string<'hello world'> hello; Like I said, I'm new to this so I'm sure there is something fundamental that I'm missing. Stiles