c++ - boost::bind or boost::lambda on std::lower_bound -

c++ - boost::bind or boost::lambda on std::lower_bound -

suppose want utilize std::lower_bound on std::vector of pointers this:

struct x { int x; double y; }; // overloads normal comparisons bool operator< (int left, const x& right) { homecoming left < right.x; } bool operator< (const x& left, int right) { homecoming left.x < right; } std::vector<x*> v; int searchvalue = 5; std::vector<x*>::iterator = std::lower_bound(v.begin(), v.end(), searchvalue, ? // heck set here? );

would utilize boost::bind or boost::lambda here, , if so, how?

i think this:

std::lower_bound(v.begin(), v.end(), searchvalue, searchvalue < *_1);

however illegal indirection error on this.

try following

struct mylessthan { bool operator()( const x* xval, int ival ) { homecoming xval->x < ival; } }; std::vector<x*> v; int searchvalue = 5; std::vector<x*>::iterator = std::lower_bound(v.begin(), v.end(), searchvalue, mylessthan() );

that should work.

c++ boost