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cppdraft/fstream/members.md

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+[fstream.members]
+
+# 31 Input/output library [[input.output]](./#input.output)
+
+## 31.10 File-based streams [[file.streams]](file.streams#fstream.members)
+
+### 31.10.6 Class template basic_fstream [[fstream]](fstream#members)
+
+#### 31.10.6.4 Member functions [fstream.members]
+
+[🔗](#lib:rdbuf,basic_fstream)
+
+`basic_filebuf<charT, traits>* rdbuf() const;
+`
+
+[1](#1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L12479)
+
+*Returns*: const_cast<basic_filebuf<charT, traits>*>(addressof(*sb*))[.](#1.sentence-1)
+
+[🔗](#lib:native_handle,basic_fstream)
+
+`native_handle_type native_handle() const noexcept;
+`
+
+[2](#2)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L12490)
+
+*Effects*: Equivalent to: return rdbuf()->native_handle();
+
+[🔗](#lib:is_open,basic_fstream)
+
+`bool is_open() const;
+`
+
+[3](#3)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L12501)
+
+*Returns*: rdbuf()->is_open()[.](#3.sentence-1)
+
+[🔗](#lib:open,basic_fstream)
+
+`void open(
+  const char* s,
+  ios_base::openmode mode = ios_base::in | ios_base::out);
+void open(
+  const filesystem::path::value_type* s,
+  ios_base::openmode mode = ios_base::in | ios_base::out);  // wide systems only; see [[fstream.syn]](fstream.syn "31.10.1 Header <fstream> synopsis")
+`
+
+[4](#4)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L12517)
+
+*Effects*: Callsrdbuf()->open(s, mode)[.](#4.sentence-1)
+
+If that function does not return a null pointer calls clear(),
+otherwise callssetstate(failbit) (which may throwios_base​::​failure) ([[iostate.flags]](iostate.flags "31.5.4.4 Flags functions"))[.](#4.sentence-2)
+
+[🔗](#lib:open,basic_fstream_)
+
+`void open(
+  const string& s,
+  ios_base::openmode mode = ios_base::in | ios_base::out);
+void open(
+  const filesystem::path& s,
+  ios_base::openmode mode = ios_base::in | ios_base::out);
+`
+
+[5](#5)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L12539)
+
+*Effects*: Calls open(s.c_str(), mode)[.](#5.sentence-1)
+
+[🔗](#lib:close,basic_fstream)
+
+`void close();
+`
+
+[6](#6)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L12550)
+
+*Effects*: Callsrdbuf()->close() and, if that function
+returns a null pointer,
+callssetstate(failbit) (which may throwios_base​::​failure) ([[iostate.flags]](iostate.flags "31.5.4.4 Flags functions"))[.](#6.sentence-1)