C++20 STL Cookbook/

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Use Manipulation Functions with Path

Use Manipulation Functions with Path

Learn to use manipulation functions with path.

We'll cover the following...

The filesystem library includes functions for manipulating the contents of path objects. In this recipe, we will consider a few of these tools.

How to do it

In this recipe, we examine some functions that manipulate the contents of path objects:

  • We start with the namespace directive and our formatter specialization. We do this in every recipe in this chapter:

namespace fs = std::filesystem;
template<>
struct std::formatter<fs::path>: std::formatter<std::string> {
    template<typename FormatContext>
    auto format(const fs::path& p, FormatContext& ctx) {
        return format_to(ctx.out(), "{}", p.string());
    }
};

  • We can get the current working directory with the current_path() function, which returns a path object:

cout << format("current_path: {}\n", fs::current_path());

Output:

current_path: /usr/include

  • The ...