tmp/tmp26xof0n9/{from.md → to.md}
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| 1 |
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#### General <a id="ifstream.general">[[ifstream.general]]</a>
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``` cpp
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namespace std {
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template<class charT, class traits = char_traits<charT>>
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class basic_ifstream : public basic_istream<charT, traits> {
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public:
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using char_type = charT;
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using int_type = typename traits::int_type;
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using pos_type = typename traits::pos_type;
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using off_type = typename traits::off_type;
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using traits_type = traits;
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// [ifstream.cons], constructors
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basic_ifstream();
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explicit basic_ifstream(const char* s,
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ios_base::openmode mode = ios_base::in);
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explicit basic_ifstream(const filesystem::path::value_type* s,
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ios_base::openmode mode = ios_base::in);// wide systems only; see [fstream.syn]
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explicit basic_ifstream(const string& s,
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ios_base::openmode mode = ios_base::in);
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template<class T>
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explicit basic_ifstream(const T& s, ios_base::openmode mode = ios_base::in);
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basic_ifstream(const basic_ifstream&) = delete;
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basic_ifstream(basic_ifstream&& rhs);
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basic_ifstream& operator=(const basic_ifstream&) = delete;
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basic_ifstream& operator=(basic_ifstream&& rhs);
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// [ifstream.swap], swap
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void swap(basic_ifstream& rhs);
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// [ifstream.members], members
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basic_filebuf<charT, traits>* rdbuf() const;
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bool is_open() const;
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void open(const char* s, ios_base::openmode mode = ios_base::in);
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void open(const filesystem::path::value_type* s,
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ios_base::openmode mode = ios_base::in); // wide systems only; see [fstream.syn]
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void open(const string& s, ios_base::openmode mode = ios_base::in);
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void open(const filesystem::path& s, ios_base::openmode mode = ios_base::in);
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void close();
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private:
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basic_filebuf<charT, traits> sb; // exposition only
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};
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}
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```
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The class `basic_ifstream<charT, traits>` supports reading from named
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files. It uses a `basic_filebuf<{}charT, traits>` object to control the
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associated sequence. For the sake of exposition, the maintained data is
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presented here as:
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- `sb`, the `filebuf` object.
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