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Path

The Path

  • class std::filesystem::path
  • like std::string but for paths
using namespace std::filesystem;

path nothing {};
assert(nothing.empty() == true);

path bin = "/usr/bin";
path gcc = bin / "gcc";

std::cout << gcc << std::endl;

path p = "/";
p /= "opt";
path p2 = p / "gcc" / "7.3.0" / "bin";

Path Constructors

  • Default-, Copy and Move-Constructors
  • From string, string_view or C-Style const char*
  • From iterator range to char

Operators are not explicit.

Path operators

  • Copy- and Move-Assignment
  • /, /= or append() to join path
  • += or concat() to append text to a path

Decomposition

path p {"/usr/share/cppughb/README.md"};
  • p.root_directory() == "/" or "C:\\"
  • p.relative_path() == "usr/share/cppughb/README.md"
  • p.parent_path() == "/usr/share/cppughb"
  • p.filename() == "README.md"
  • p.stem() == "README"
  • p.extension() == ".md"

Queries

path p = "/usr/share/cppughb/README.md";
  • p.empty() == false
  • p.has_*() == (not p.*().empty())
  • p.is_absolute() == true
  • p.is_relative() == false

Modifiers

path p {"/usr/share/cppughb/README.md"};
  • p.clear()
  • p.make_preferred() == "\\usr\\share\\cppughb\\README.md" (on Windows)
  • p.remove_filename()
  • p.replace_filename("LIESMICH.md")
  • p.replace_extension(".txt")