id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
8969	boost::geometry::model::point single argument constructor should be explicit	Jared Russell <jaredrussell341@…>	Barend Gehrels	"In boost/geometry/geometries/point.hpp, the function:

point::point(CoordinateType const & v0, CoordinateType const & v1 = 0, CoordinateType const & v2 = 0)

has default arguments.  Because there is a single argument case, we can use this function for implicit conversion.  This is probably not the desired behavior.  As a result, any numerical type can be implicitly converted to a point whether you meant to or not.  Adding the ""explicit"" keyword resolves the issue.

Example:

{{{
namespace bgm = boost::geometry::model;
namespace bgc = boost::geometry::cs;

bgm::point<double, 2, bgc::cartesian> ll(0.0, 0.0); // lower left
bgm::point<double, 2, bgc::cartesian> ur(100.0, 100.0); // upper right

bgm::box<bgm::point<double, 2, bgc::cartesian> > myBox(11,ur); // Oops!  literal 11, not ""ll"".  But it will compile!
}}}"	Feature Requests	closed	Boost 1.55.0	geometry	Boost 1.55.0	Problem	fixed