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      std::experimental::filesystem::path::concat,std::experimental::filesystem::path::operator+=

      From cppreference.com
      <cpp‎ |experimental‎ |fs‎ |path
       
       
       
      Filesystem library
      Classes
      Functions
      File types
       
      path
      Member functions
      Path decomposition
      Non-member functions
       
      path& operator+=(const path& p);
      		 (1)(filesystem TS)
      path& operator+=(const string_type& str);
      		 (2)(filesystem TS)
      path& operator+=(const value_type* ptr);
      		 (3)(filesystem TS)
      path& operator+=( value_type x);
      		 (4)(filesystem TS)
      template<class Source>
      path& operator+=(const Source& source);
      		 (5)(filesystem TS)
      template<class CharT>
      path& operator+=( CharT x);
      		 (6)(filesystem TS)
      template<class Source>
      path& concat(const Source& source);
      		 (7)(filesystem TS)
      template<class InputIt>
      path& concat( InputIterator first, InputIterator last);
      		 (8)(filesystem TS)

      Concatenates the current path and the argument.

      1) Concatenates*this andp in such a way thatnative() of the result is exactly originalnative() concatenated withp.native().
      2) Same as(1), except the resultingnative() is a concatenation of the originalnative() and the stringstr.
      3) Same as(1), except the resultingnative() is a concatenation of the originalnative() and the null-terminated string whose first character is pointed to byptr.
      4) Same as(1), except the resultingnative() is a concatenation of the originalnative() and the single characterx.
      5) Same as(1), except the resultingnative() is a concatenation of the originalnative() and the sequence (which may be in portable or native format) represented bysource, which may bestd::basic_string, null-terminated multicharacter string, or an input iterator pointing to a null-terminated multicharacter sequence.
      6) Same as(4), except that character conversion may be performed.
      7) Same as(5).
      8) Same as(5), except that the sequence is represented by any iterator pair that designates a multicharacter string.

      Contents

      [edit]Parameters

      p - path to append
      str - string to append
      ptr - pointer to the beginning of a null-terminated string to append
      x - single character to append
      source -std::basic_string, null-terminated multicharacter string, or an input iterator pointing to a null-terminated multicharacter sequence, which represents a path name (either in portable or in native format)
      first, last - pair ofLegacyInputIterators that specify a multicharacter sequence that represents a path name
      Type requirements
      -
      InputIt must meet the requirements ofLegacyInputIterator.
      -
      The value type ofInputIt must be one of the encoded character types (char,wchar_t,char16_t andchar32_t).
      -
      CharT must be one of the encoded character types (char,wchar_t,char16_t andchar32_t).

      [edit]Return value

      *this

      [edit]Exceptions

      May throwfilesystem_error on underlying OS API errors orstd::bad_alloc if memory allocation fails.

      [edit]Notes

      Unlike withappend() oroperator/=, additional directory separators are never introduced.

      [edit]Example

      Run this code
      #include <experimental/filesystem>#include <iostream>namespace fs= std::experimental::filesystem; int main(){    fs::path p1;// empty path    p1+="var";// does not insert a separatorstd::cout<<"\"\" +\"var\" == "<< p1<<'\n';    p1+="lib";// does not insert a separatorstd::cout<<"\"\" +\"var\" +\"lib\" == "<< p1<<'\n';}

      Output:

      "" + "var" == "var""" + "var" + "lib" == "varlib"

      [edit]See also

      appends elements to the path
      (public member function)[edit]
      concatenates two paths with a directory separator
      (function)[edit]
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/experimental/fs/path/concat&oldid=154865"
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