Re: [Boost-users] [multi_index] index based on case-insensitive strings

On Fri, 23 Feb 2007 11:24:35 +0200, Joaquín Mª López Muñoz wrote:

[...]Yep, it is correct, though possibly a little overkill; you could use a simpler key extractor for the task at hand, like this:

struct employee_case_insensitive_name_extractor { typedef std::string result_type;

std::string operator()(const employee& x) const { return boost::algorithm::to_lower_copy(x.name); } };

If the existing key extractors had a fourth template parameter to accept an unary function object I think it would be a bit easier to create user-defined key extractors? Imagine a (simplified) member defintion like this: template struct member { typedef Type result_type; Type& operator()(const Class& x)const { return Functor(x.*PtrToMember); } }; Now I could create my multi_index_container like this: typedef multi_index_container< employee, indexed_by< hashed_unique >

mi2;

Do I miss anything? If not please regard this as a proposal to improve Boost.Multi-index. :) Boris