property_tree::string_path<StringT, TranslatorT>'s operator / won't accept StringT as an argument

[LRFLEW <LRFLEW.Coll@…>]

A very simple example of the problem can be seen with this code:

boost::property_tree::path_of<std::string>::type path("parent");
std::string component("child");
path / component;

This produces an error of "no match for operator/". I have tested this on G++ 6.2.0, VS 14 Update 3, and Apple's clang-800.0.38, and they all produce roughly the same error. This issue can be worked around by replacing the third line with path / boost::property_tree::path_of<std::string>::type(component) or path / component.c_str();, as those types are both explicitly overloaded. Adding an additional overload for the String type will fix this issue.