Annex D (normative) Compatibility features [depr]

D.6 char* streams [depr.str.strstreams]

D.6.2 Class istrstream [depr.istrstream]

namespace std {
  class istrstream : public basic_istream<char> {
  public:
    explicit istrstream(const char* s);
    explicit istrstream(char* s);
    istrstream(const char* s, streamsize n);
    istrstream(char* s, streamsize n);
    virtual ~istrstream();

    strstreambuf* rdbuf() const;
    char* str();
  private:
    strstreambuf sb;  // exposition only
  };
}
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The class istrstream supports the reading of objects of class strstreambuf. It supplies a strstreambuf object to control the associated array object. For the sake of exposition, the maintained data is presented here as:

D.6.2.1 istrstream constructors [depr.istrstream.cons]

explicit istrstream(const char* s); explicit istrstream(char* s);

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Effects: Constructs an object of class istrstream, initializing the base class with istream(&sb) and initializing sb with strstreambuf(s,0). s shall designate the first element of an ntbs.

istrstream(const char* s, streamsize n); istrstream(char* s, streamsize n);

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Effects: Constructs an object of class istrstream, initializing the base class with istream(&sb) and initializing sb with strstreambuf(s,n). s shall designate the first element of an array whose length is n elements, and n shall be greater than zero.

D.6.2.2 Member functions [depr.istrstream.members]

strstreambuf* rdbuf() const;

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Returns: const_­cast<strstreambuf*>(&sb).

char* str();

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Returns: rdbuf()->str().