27 Input/output library [input.output]

27.8 String-based streams [string.streams]

27.8.2 Class template basic_stringbuf [stringbuf]

27.8.2.1 basic_stringbuf constructors [stringbuf.cons]

explicit basic_stringbuf( ios_base::openmode which = ios_base::in | ios_base::out);

1

Effects: Constructs an object of class basic_stringbuf, initializing the base class with basic_streambuf() ([streambuf.cons]), and initializing mode with which.

2

Postconditions: str() == "".

explicit basic_stringbuf( const basic_string<charT, traits, Allocator>& s, ios_base::openmode which = ios_base::in | ios_base::out);

3

Effects: Constructs an object of class basic_stringbuf, initializing the base class with basic_streambuf() ([streambuf.cons]), and initializing mode with which. Then calls str(s).

basic_stringbuf(basic_stringbuf&& rhs);

4

Effects: Move constructs from the rvalue rhs. It is implementation-defined whether the sequence pointers in *this (eback(), gptr(), egptr(), pbase(), pptr(), epptr()) obtain the values which rhs had. Whether they do or not, *this and rhs reference separate buffers (if any at all) after the construction. The openmode, locale and any other state of rhs is also copied.

5

Postconditions: Let rhs_p refer to the state of rhs just prior to this construction and let rhs_a refer to the state of rhs just after this construction.

  • (5.1)

    str() == rhs_p.str()

  • (5.2)

    gptr() - eback() == rhs_p.gptr() - rhs_p.eback()

  • (5.3)

    egptr() - eback() == rhs_p.egptr() - rhs_p.eback()

  • (5.4)

    pptr() - pbase() == rhs_p.pptr() - rhs_p.pbase()

  • (5.5)

    epptr() - pbase() == rhs_p.epptr() - rhs_p.pbase()

  • (5.6)

    if (eback()) eback() != rhs_a.eback()

  • (5.7)

    if (gptr()) gptr() != rhs_a.gptr()

  • (5.8)

    if (egptr()) egptr() != rhs_a.egptr()

  • (5.9)

    if (pbase()) pbase() != rhs_a.pbase()

  • (5.10)

    if (pptr()) pptr() != rhs_a.pptr()

  • (5.11)

    if (epptr()) epptr() != rhs_a.epptr()