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| <HEAD> |
| <TITLE>basic_ostringstream</TITLE> |
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| <H2>basic_ostringstream</H2> |
| <P><B>Library:</B> <A HREF="2-11.html">Input/output</A></P> |
| |
| <PRE><HR><B><I>basic_ostringstream</I></B> <IMG SRC="images/inherits.gif"> <B><I><A HREF="basic-ostream.html">basic_ostream</A></I></B> <IMG SRC="images/inherits.gif"> <B><I><A HREF="basic-ios.html">basic_ios</A></I></B> <IMG SRC="images/inherits.gif"> <B><I><A HREF="ios-base.html">ios_base</A></I></B><HR></PRE> |
| |
| <UL> |
| <LI><A HREF="#sec1">Local Index</A></LI> |
| <LI><A HREF="#sec2">Summary</A></LI> |
| <LI><A HREF="#sec3">Synopsis</A></LI> |
| <LI><A HREF="#sec4">Description</A></LI> |
| <LI><A HREF="#sec5">Interface</A></LI> |
| <LI><A HREF="#sec6">Member Types</A></LI> |
| <LI><A HREF="#sec7">Nonmember Types</A></LI> |
| <LI><A HREF="#sec8">Constructors</A></LI> |
| <LI><A HREF="#sec9">Destructors</A></LI> |
| <LI><A HREF="#sec10">Member Functions</A></LI> |
| <LI><A HREF="#sec11">Example</A></LI> |
| <LI><A HREF="#sec12">See Also</A></LI> |
| <LI><A HREF="#sec13">Standards Conformance</A></LI> |
| </UL> |
| <A NAME="sec1"><H3>Local Index</H3></A> |
| <H4>Members</H4> |
| <UL><TABLE CELLPADDING=3> |
| <TR><TD VALIGN=top> |
| <A HREF="#idx259">allocator_type</A><BR> |
| <A HREF="#idx268">basic_ostringstream()</A><BR> |
| <A HREF="#idx260">char_type</A><BR> |
| </TD> |
| <TD VALIGN=top><A HREF="#idx261">int_type</A><BR> |
| <A HREF="#idx262">ios_type</A><BR> |
| <A HREF="#idx263">off_type</A><BR> |
| </TD> |
| <TD VALIGN=top><A HREF="#idx264">pos_type</A><BR> |
| <A HREF="#idx271">rdbuf()</A><BR> |
| <A HREF="#idx272">str()</A><BR> |
| </TD> |
| <TD VALIGN=top><A HREF="#idx265">traits_type</A><BR> |
| <A HREF="#idx270">~basic_ostringstream()</A><BR> |
| </TD></TR> |
| </TABLE></UL> |
| <H4>Non-Members</H4> |
| <UL><TABLE CELLPADDING=3> |
| <TR><TD VALIGN=top> |
| <A HREF="#idx266">ostringstream</A><BR> |
| </TD> |
| <TD VALIGN=top><A HREF="#idx267">wostringstream</A><BR> |
| </TD> |
| <TD VALIGN=top></TD></TR> |
| </TABLE></UL> |
| |
| <A NAME="sec2"><H3>Summary</H3></A> |
| <P>Class that supports writing objects of specializations of class template <B><I><A HREF="basic-string.html">basic_string</A></I></B> </P> |
| <A NAME="sec3"><H3>Synopsis</H3></A> |
| |
| <PRE>#include <sstream> |
| |
| namespace std { |
| template<class charT, class traits = char_traits<charT>, |
| class Allocator = allocator<void> > |
| class basic_ostringstream; |
| } |
| </PRE> |
| <A NAME="sec4"><H3>Description</H3></A> |
| <P>The class template <B><I>basic_ostringstream</I></B> writes to an array in memory. It supports writing objects of class <B><I><A HREF="basic-string.html">basic_string</A></I></B>. It uses a <B><I><A HREF="basic-stringbuf.html">basic_stringbuf</A></I></B> object to control the associated storage. It inherits from <B><I><A HREF="basic-ostream.html">basic_ostream</A></I></B>, and therefore can use all the formatted and unformatted output functions. </P> |
| <A NAME="sec5"><H3>Interface</H3></A> |
| |
| <UL><PRE>namespace std { |
| |
| template<class charT, class traits = char_traits<charT>, |
| class Allocator = allocator<charT> > |
| class basic_ostringstream |
| : public basic_ostream<charT, traits> |
| { |
| public: |
| |
| typedef traits traits_type; |
| typedef charT char_type; |
| typedef Allocator allocator_type; |
| typedef typename traits_type::int_type int_type; |
| typedef typename traits_type::pos_type pos_type; |
| typedef typename traits_type::off_type off_type; |
| |
| explicit |
| basic_ostringstream(ios_base::openmode = ios_base::out); |
| |
| explicit |
| basic_ostringstream(const basic_string<char_type, |
| traits_type, allocator_type>&, |
| ios_base::openmode = ios_base::out); |
| |
| virtual ~basic_ostringstream(); |
| |
| basic_stringbuf<char_type, traits_type, allocator_type>* |
| rdbuf() const; |
| basic_string<char_type, traits_type, allocator_type> |
| str() const; |
| void |
| str(const basic_string<char_type, traits_type, |
| allocator_type>& str); |
| }; |
| } |
| </PRE></UL> |
| <A NAME="sec6"><H3>Member Types</H3></A> |
| |
| <A NAME="idx259"></A><PRE><B>allocator_type</B></PRE> |
| <UL> |
| <P>The type <SAMP>allocator_type</SAMP> is a synonym for the template parameter <SAMP>Allocator</SAMP>.</P> |
| </UL> |
| |
| |
| <A NAME="idx260"></A><PRE><B>char_type</B></PRE> |
| <UL> |
| <P>The type <SAMP>char_type</SAMP> is a synonym for the template parameter <SAMP>charT</SAMP>.</P> |
| </UL> |
| |
| |
| <A NAME="idx261"></A><PRE><B>int_type</B></PRE> |
| <UL> |
| <P>The type <SAMP>int_type</SAMP> is a synonym of type <SAMP>traits::in_type</SAMP>.</P> |
| </UL> |
| |
| |
| <A NAME="idx262"></A><PRE><B>ios_type</B></PRE> |
| <UL> |
| <P>The type<SAMP> ios_type</SAMP> is an instantiation of class <B><I><A HREF="basic-ios.html">basic_ios</A></I></B> on type <SAMP>charT</SAMP>.</P> |
| </UL> |
| |
| |
| <A NAME="idx263"></A><PRE><B>off_type</B></PRE> |
| <UL> |
| <P>The type <SAMP>off_type</SAMP> is a synonym of type <SAMP>traits::off_type</SAMP>.</P> |
| </UL> |
| |
| |
| <A NAME="idx264"></A><PRE><B>pos_type</B></PRE> |
| <UL> |
| <P>The type <SAMP>pos_type</SAMP> is a synonym of type <SAMP>traits::pos_type</SAMP>.</P> |
| </UL> |
| |
| |
| <A NAME="idx265"></A><PRE><B>traits_type</B></PRE> |
| <UL> |
| <P>The type <SAMP>traits_type</SAMP> is a synonym for the template parameter <SAMP>traits</SAMP>.</P> |
| </UL> |
| |
| <A NAME="sec7"><H3>Nonmember Types</H3></A> |
| |
| <A NAME="idx266"></A><PRE><B>ostringstream</B></PRE> |
| <UL> |
| <P>The type <SAMP>ostringstream</SAMP> is a specialization of class <B><I>basic_ostringstream</I></B> on type <SAMP>char</SAMP>:</P> |
| <P><SAMP>typedef basic_ostringstream<char> ostringstream;</SAMP></P> |
| </UL> |
| |
| |
| <A NAME="idx267"></A><PRE><B>wostringstream</B></PRE> |
| <UL> |
| <P>The type <SAMP>wostringstream</SAMP> is a specialization of class <B><I>basic_ostringstream</I></B> on type <SAMP>wchar_t</SAMP>:</P> |
| <P><SAMP>typedef basic_ostringstream<wchar_t> wostringstream;</SAMP></P> |
| </UL> |
| |
| <A NAME="sec8"><H3>Constructors</H3></A> |
| |
| <A NAME="idx268"></A><PRE>explicit <B>basic_ostringstream</B>(ios_base::openmode which = |
| ios_base::out); </PRE> |
| <UL> |
| <P>Constructs an object of class <B><I>basic_ostringstream</I></B>, initializing the base class <B><I><A HREF="basic-ostream.html">basic_ostream</A></I></B> with the associated string buffer. The string buffer is initialized by calling the <B><I><A HREF="basic-stringbuf.html">basic_stringbuf</A></I></B> constructor:</P> |
| <P> <SAMP>basic_stringbuf<charT,traits,Allocator>(which);</SAMP></P> |
| </UL> |
| |
| |
| <A NAME="idx269"></A><PRE>explicit <B>basic_ostringstream</B>(const basic_string<char_type, |
| traits_type, allocator_type>& str, |
| ios_base::openmode which = |
| ios_base::out);</PRE> |
| <UL> |
| <P>Constructs an object of class <B><I>basic_ostringstream</I></B>, initializing the base class <B><I><A HREF="basic-ostream.html">basic_ostream</A></I></B> with the associated string buffer. The string buffer is initialized by calling the <B><I><A HREF="basic-stringbuf.html">basic_stringbuf</A></I></B> constructor:</P> |
| <P> <SAMP>basic_stringbuf<char_type, traits_type,<br> allocator_type>(str, which)</SAMP>;</P> |
| </UL> |
| |
| <A NAME="sec9"><H3>Destructors</H3></A> |
| |
| <A NAME="idx270"></A><PRE>virtual <B>~basic_ostringstream</B>();</PRE> |
| <UL> |
| <P>Destroys an object of class <B><I>basic_ostringstream</I></B>.</P> |
| </UL> |
| |
| <A NAME="sec10"><H3>Member Functions</H3></A> |
| |
| <A NAME="idx271"></A><PRE>basic_stringbuf<char_type, traits_type, allocator_type>* |
| <B>rdbuf</B>() const; </PRE> |
| <UL> |
| <P>Returns a pointer to the <B><I><A HREF="basic-stringbuf.html">basic_stringbuf</A></I></B> associated with the stream.</P> |
| </UL> |
| |
| |
| <A NAME="idx272"></A><PRE>basic_string<char_type, traits_type, allocator_type> |
| <B>str</B>() const;</PRE> |
| <UL> |
| <P>Returns <SAMP>rdbuf()->str()</SAMP>.</P> |
| </UL> |
| |
| |
| <A NAME="idx273"></A><PRE>void |
| <B>str</B>(const basic_string<char_type, traits_type, allocator_type>& str);</PRE> |
| <UL> |
| <P>Calls <SAMP>rdbuf()->str (str)</SAMP>. </P> |
| </UL> |
| |
| <A NAME="sec11"><H3>Example</H3></A> |
| <P>See <B><I><A HREF="basic-stringstream.html">basic_stringstream</A></I></B>, <B><I><A HREF="basic-istringstream.html">basic_istringstream</A></I></B> and <B><I><A HREF="basic-stringbuf.html">basic_stringbuf</A></I></B> examples.</P> |
| <A NAME="sec12"><H3>See Also</H3></A> |
| <P><B><I><A HREF="char-traits.html">char_traits</A></I></B>, <B><I><A HREF="ios-base.html">ios_base</A></I></B>, <B><I><A HREF="basic-ios.html">basic_ios</A></I></B>, <B><I><A HREF="basic-stringbuf.html">basic_stringbuf</A></I></B>, <B><I><A HREF="basic-string.html">basic_string</A></I></B>, <B><I><A HREF="basic-istringstream.html">basic_istringstream</A></I></B>, <B><I><A HREF="basic-stringstream.html">basic_stringstream</A></I></B></P> |
| <A NAME="sec13"><H3>Standards Conformance</H3></A> |
| <P><I>ISO/IEC 14882:1998 -- International Standard for Information Systems --Programming Language C++, Section 27.7.3</I></P> |
| |
| <BR> |
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