Appending to boost::filesystem::path

Question

I have a certain boost::filesystem::path in hand and I'd like to append a string (or path) to it.

boost::filesystem::path p("c:\\dir"); p.append(".foo"); // should result in p pointing to c:\dir.foo 

The only overload boost::filesystem::path has of append wants two InputIterators.

My solution so far is to do the following:

boost::filesystem::path p2(std::string(p.string()).append(".foo")); 

Am I missing something?

Answer 1

If it's really just the file name extension you want to change then you are probably better off writing:

p.replace_extension(".foo"); 

for most other file path operations you can use the operators /= and / allowing to concatenate parts of a name. For instance

boost::filesystem::path p("c:\\dir"); p /= "subdir"; 

will refer to c:\dir\subdir.