LWG 2328 Rvalue stream extraction should use perfect forwarding

[gcc.git] / libstdc++-v3 / doc / xml / manual / intro.xml

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	Here are the issues which have resulted in code changes to the library.
	The links are to the specific defect reports from a <emphasis>partial
	copy</emphasis> of the Issues List.  You can read the full version online
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      <para>
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	status will probably break.  Rather than trying to mirror the
	entire issues list on our overworked web server, we recommend
	you go to the LWG homepage instead.)
      </para>
      <para>
	If a DR is not listed here, we may simply not have gotten to
	it yet; feel free to submit a patch.  Search the include/bits
	and src directories for appearances of
	<constant>_GLIBCXX_RESOLVE_LIB_DEFECTS</constant> for examples
	of style.  Note that we usually do not make changes to the
	code until an issue has reached <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-active.html#DR">DR</link> status.
      </para>

      <variablelist>
    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#5">5</link>:
	<emphasis>string::compare specification questionable</emphasis>
    </term>
    <listitem><para>This should be two overloaded functions rather than a single function.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#17">17</link>:
	<emphasis>Bad bool parsing</emphasis>
    </term>
    <listitem><para>Apparently extracting Boolean values was messed up...
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#19">19</link>:
	<emphasis>"Noconv" definition too vague</emphasis>
    </term>
    <listitem><para>If <code>codecvt::do_in</code> returns <code>noconv</code> there are
	no changes to the values in <code>[to, to_limit)</code>.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#22">22</link>:
	<emphasis>Member open vs flags</emphasis>
    </term>
    <listitem><para>Re-opening a file stream does <emphasis>not</emphasis> clear the state flags.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#23">23</link>:
	<emphasis>Num_get overflow result</emphasis>
    </term>
    <listitem><para>Implement the proposed resolution.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#25">25</link>:
	<emphasis>String operator&lt;&lt; uses width() value wrong</emphasis>
    </term>
    <listitem><para>Padding issues.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#48">48</link>:
	<emphasis>Use of non-existent exception constructor</emphasis>
    </term>
    <listitem><para>An instance of <code>ios_base::failure</code> is constructed instead.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#49">49</link>:
	<emphasis>Underspecification of ios_base::sync_with_stdio</emphasis>
    </term>
    <listitem><para>The return type is the <emphasis>previous</emphasis> state of synchronization.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#50">50</link>:
	<emphasis>Copy constructor and assignment operator of ios_base</emphasis>
    </term>
    <listitem><para>These members functions are declared <code>private</code> and are
	thus inaccessible.  Specifying the correct semantics of
	"copying stream state" was deemed too complicated.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#60">60</link>:
	<emphasis>What is a formatted input function?</emphasis>
    </term>
    <listitem><para>This DR made many widespread changes to <code>basic_istream</code>
	and <code>basic_ostream</code> all of which have been implemented.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#63">63</link>:
	<emphasis>Exception-handling policy for unformatted output</emphasis>
    </term>
    <listitem><para>Make the policy consistent with that of formatted input, unformatted
	input, and formatted output.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#68">68</link>:
	<emphasis>Extractors for char* should store null at end</emphasis>
    </term>
    <listitem><para>And they do now.  An editing glitch in the last item in the list of
	[27.6.1.2.3]/7.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#74">74</link>:
	<emphasis>Garbled text for codecvt::do_max_length</emphasis>
    </term>
    <listitem><para>The text of the standard was gibberish.  Typos gone rampant.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#75">75</link>:
	<emphasis>Contradiction in codecvt::length's argument types</emphasis>
    </term>
    <listitem><para>Change the first parameter to <code>stateT&amp;</code> and implement
	the new effects paragraph.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#83">83</link>:
	<emphasis>string::npos vs. string::max_size()</emphasis>
    </term>
    <listitem><para>Safety checks on the size of the string should test against
	<code>max_size()</code> rather than <code>npos</code>.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#90">90</link>:
	<emphasis>Incorrect description of operator&gt;&gt; for strings</emphasis>
    </term>
    <listitem><para>The effect contain <code>isspace(c,getloc())</code> which must be
	replaced by <code>isspace(c,is.getloc())</code>.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#91">91</link>:
	<emphasis>Description of operator&gt;&gt; and getline() for string&lt;&gt;
	    might cause endless loop</emphasis>
    </term>
    <listitem><para>They behave as a formatted input function and as an unformatted
	input function, respectively (except that <code>getline</code> is
	not required to set <code>gcount</code>).
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#103">103</link>:
	<emphasis>set::iterator is required to be modifiable, but this allows
	    modification of keys.</emphasis>
    </term>
    <listitem><para>For associative containers where the value type is the same as
	the key type, both <code>iterator</code> and <code>const_iterator
	</code> are constant iterators.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#109">109</link>:
	<emphasis>Missing binders for non-const sequence elements</emphasis>
    </term>
    <listitem><para>The <code>binder1st</code> and <code>binder2nd</code> didn't have an
	<code>operator()</code> taking a non-const parameter.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#110">110</link>:
	<emphasis>istreambuf_iterator::equal not const</emphasis>
    </term>
    <listitem><para>This was not a const member function.  Note that the DR says to
	replace the function with a const one; we have instead provided an
	overloaded version with identical contents.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#117">117</link>:
	<emphasis>basic_ostream uses nonexistent num_put member functions</emphasis>
    </term>
    <listitem><para><code>num_put::put()</code> was overloaded on the wrong types.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#118">118</link>:
	<emphasis>basic_istream uses nonexistent num_get member functions</emphasis>
    </term>
    <listitem><para>Same as 117, but for <code>num_get::get()</code>.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#129">129</link>:
	<emphasis>Need error indication from seekp() and seekg()</emphasis>
    </term>
    <listitem><para>These functions set <code>failbit</code> on error now.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#130">130</link>:
	<emphasis>Return type of container::erase(iterator) differs for associative containers</emphasis>
    </term>
    <listitem><para>Make member <code>erase</code> return iterator for <code>set</code>, <code>multiset</code>, <code>map</code>, <code>multimap</code>.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#136">136</link>:
	<emphasis>seekp, seekg setting wrong streams?</emphasis>
    </term>
    <listitem><para><code>seekp</code> should only set the output stream, and
	<code>seekg</code> should only set the input stream.
    </para></listitem></varlistentry>

<!--<varlistentry><term><ulink url="../ext/lwg-defects.html#159">159</ulink>:
	<emphasis>Strange use of underflow()</emphasis>
    </term>
    <listitem><para>In fstream.tcc, the basic_filebuf&lt;&gt;::showmanyc() function
	should probably not be calling <code>underflow()</code>.
    </para></listitem></varlistentry> -->

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#167">167</link>:
	<emphasis>Improper use of traits_type::length()</emphasis>
    </term>
    <listitem><para><code>op&lt;&lt;</code> with a <code>const char*</code> was
	calculating an incorrect number of characters to write.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#169">169</link>:
	<emphasis>Bad efficiency of overflow() mandated</emphasis>
    </term>
    <listitem><para>Grow efficiently the internal array object.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#171">171</link>:
	<emphasis>Strange seekpos() semantics due to joint position</emphasis>
    </term>
    <listitem><para>Quite complex to summarize...
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#181">181</link>:
	<emphasis>make_pair() unintended behavior</emphasis>
    </term>
    <listitem><para>This function used to take its arguments as reference-to-const, now
	it copies them (pass by value).
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#195">195</link>:
	<emphasis>Should basic_istream::sentry's constructor ever set eofbit?</emphasis>
    </term>
    <listitem><para>Yes, it can, specifically if EOF is reached while skipping whitespace.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#211">211</link>:
	<emphasis>operator&gt;&gt;(istream&amp;, string&amp;) doesn't set failbit</emphasis>
    </term>
    <listitem><para>If nothing is extracted into the string, <code>op&gt;&gt;</code> now
	sets <code>failbit</code> (which can cause an exception, etc., etc.).
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#214">214</link>:
	<emphasis>set::find() missing const overload</emphasis>
    </term>
    <listitem><para>Both <code>set</code> and <code>multiset</code> were missing
	overloaded find, lower_bound, upper_bound, and equal_range functions
	for const instances.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#231">231</link>:
	<emphasis>Precision in iostream?</emphasis>
    </term>
    <listitem><para>For conversion from a floating-point type, <code>str.precision()</code>
	is specified in the conversion specification.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#233">233</link>:
	<emphasis>Insertion hints in associative containers</emphasis>
    </term>
    <listitem><para>Implement N1780, first check before then check after, insert as close
	to hint as possible.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#235">235</link>:
	<emphasis>No specification of default ctor for reverse_iterator</emphasis>
    </term>
    <listitem><para>The declaration of <code>reverse_iterator</code> lists a default constructor.
	However, no specification is given what this constructor should do.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#241">241</link>:
	<emphasis>Does unique_copy() require CopyConstructible and Assignable?</emphasis>
    </term>
    <listitem><para>Add a helper for forward_iterator/output_iterator, fix the existing
	one for input_iterator/output_iterator to not rely on Assignability.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#243">243</link>:
	<emphasis>get and getline when sentry reports failure</emphasis>
    </term>
    <listitem><para>Store a null character only if the character array has a non-zero size.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#251">251</link>:
	<emphasis>basic_stringbuf missing allocator_type</emphasis>
    </term>
    <listitem><para>This nested typedef was originally not specified.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#253">253</link>:
	<emphasis>valarray helper functions are almost entirely useless</emphasis>
    </term>
    <listitem><para>Make the copy constructor and copy-assignment operator declarations
	public in gslice_array, indirect_array, mask_array, slice_array; provide
	definitions.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#265">265</link>:
	<emphasis>std::pair::pair() effects overly restrictive</emphasis>
    </term>
    <listitem><para>The default ctor would build its members from copies of temporaries;
	now it simply uses their respective default ctors.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#266">266</link>:
	<emphasis>bad_exception::~bad_exception() missing Effects clause</emphasis>
    </term>
    <listitem><para>The <code>bad_</code>* classes no longer have destructors (they
	are trivial), since no description of them was ever given.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#271">271</link>:
	<emphasis>basic_iostream missing typedefs</emphasis>
    </term>
    <listitem><para>The typedefs it inherits from its base classes can't be used, since
	(for example) <code>basic_iostream&lt;T&gt;::traits_type</code> is ambiguous.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#275">275</link>:
	<emphasis>Wrong type in num_get::get() overloads</emphasis>
    </term>
    <listitem><para>Similar to 118.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#280">280</link>:
	<emphasis>Comparison of reverse_iterator to const reverse_iterator</emphasis>
    </term>
    <listitem><para>Add global functions with two template parameters.
	(NB: not added for now a templated assignment operator)
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#292">292</link>:
	<emphasis>Effects of a.copyfmt (a)</emphasis>
    </term>
    <listitem><para>If <code>(this == &amp;rhs)</code> do nothing.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#300">300</link>:
	<emphasis>List::merge() specification incomplete</emphasis>
    </term>
    <listitem><para>If <code>(this == &amp;x)</code> do nothing.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#303">303</link>:
	<emphasis>Bitset input operator underspecified</emphasis>
    </term>
    <listitem><para>Basically, compare the input character to
		    <code>is.widen(0)</code> and <code>is.widen(1)</code>.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#305">305</link>:
	<emphasis>Default behavior of codecvt&lt;wchar_t, char,
		  mbstate_t&gt;::length()</emphasis>
    </term>
    <listitem><para>Do not specify what <code>codecvt&lt;wchar_t, char,
		    mbstate_t&gt;::do_length</code> must return.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#328">328</link>:
	<emphasis>Bad sprintf format modifier in
		  money_put&lt;&gt;::do_put()</emphasis>
    </term>
    <listitem><para>Change the format string to "%.0Lf".
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#365">365</link>:
	<emphasis>Lack of const-qualification in clause 27</emphasis>
    </term>
    <listitem><para>Add const overloads of <code>is_open</code>.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#387">387</link>:
	<emphasis>std::complex over-encapsulated</emphasis>
    </term>
    <listitem><para>Add the <code>real(T)</code> and <code>imag(T)</code>
		    members;  in C++11 mode, also adjust the existing
		    <code>real()</code> and <code>imag()</code> members and
		    free functions.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#389">389</link>:
	<emphasis>Const overload of valarray::operator[] returns
		  by value</emphasis>
    </term>
    <listitem><para>Change it to return a <code>const T&amp;</code>.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#396">396</link>:
	<emphasis>what are characters zero and one</emphasis>
    </term>
    <listitem><para>Implement the proposed resolution.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#402">402</link>:
	<emphasis>Wrong new expression in [some_]allocator::construct</emphasis>
    </term>
    <listitem><para>Replace "new" with "::new".
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-closed.html#408">408</link>:
	<emphasis>
	Is vector&lt;reverse_iterator&lt;char*&gt; &gt; forbidden?
	</emphasis>
    </term>
    <listitem><para>Tweak the debug-mode checks in _Safe_iterator.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#409">409</link>:
	<emphasis>Closing an fstream should clear the error state</emphasis>
    </term>
    <listitem><para>Have <code>open</code> clear the error flags.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-closed.html#431">431</link>:
	<emphasis>Swapping containers with unequal allocators</emphasis>
    </term>
    <listitem><para>Implement Option 3, as per N1599.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#432">432</link>:
	<emphasis>stringbuf::overflow() makes only one write position
	    available</emphasis>
    </term>
    <listitem><para>Implement the resolution, beyond DR 169.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#434">434</link>:
	<emphasis>bitset::to_string() hard to use</emphasis>
    </term>
    <listitem><para>Add three overloads, taking fewer template arguments.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#438">438</link>:
	<emphasis>Ambiguity in the "do the right thing" clause</emphasis>
    </term>
    <listitem><para>Implement the resolution, basically cast less.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#445">445</link>:
	<emphasis>iterator_traits::reference unspecified for some iterator categories</emphasis>
    </term>
    <listitem><para>Change <code>istreambuf_iterator::reference</code> in C++11 mode.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#453">453</link>:
	<emphasis>basic_stringbuf::seekoff need not always fail for an empty stream</emphasis>
    </term>
    <listitem><para>Don't fail if the next pointer is null and newoff is zero.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#455">455</link>:
	<emphasis>cerr::tie() and wcerr::tie() are overspecified</emphasis>
    </term>
    <listitem><para>Initialize cerr tied to cout and wcerr tied to wcout.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#464">464</link>:
	<emphasis>Suggestion for new member functions in standard containers</emphasis>
    </term>
    <listitem><para>Add <code>data()</code> to <code>std::vector</code> and
	<code>at(const key_type&amp;)</code> to <code>std::map</code>.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#467">467</link>:
	<emphasis>char_traits::lt(), compare(), and memcmp()</emphasis>
    </term>
    <listitem><para>Change <code>lt</code>.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#508">508</link>:
	<emphasis>Bad parameters for ranlux64_base_01</emphasis>
    </term>
    <listitem><para>Fix the parameters.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-closed.html#512">512</link>:
	<emphasis>Seeding subtract_with_carry_01 from a single unsigned long</emphasis>
    </term>
    <listitem><para>Construct a <code>linear_congruential</code> engine and seed with it.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-closed.html#526">526</link>:
	<emphasis>Is it undefined if a function in the standard changes in
	    parameters?</emphasis>
    </term>
    <listitem><para>Use &amp;value.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#538">538</link>:
	<emphasis>241 again: Does unique_copy() require CopyConstructible
	    and Assignable?</emphasis>
    </term>
    <listitem><para>In case of input_iterator/output_iterator rely on Assignability of
	input_iterator' value_type.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#539">539</link>:
	<emphasis>partial_sum and adjacent_difference should mention
	    requirements</emphasis>
    </term>
    <listitem><para>We were almost doing the right thing, just use std::move
	in adjacent_difference.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#541">541</link>:
	<emphasis>shared_ptr template assignment and void</emphasis>
    </term>
    <listitem><para>Add an auto_ptr&lt;void&gt; specialization.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#543">543</link>:
	<emphasis>valarray slice default constructor</emphasis>
    </term>
    <listitem><para>Follow the straightforward proposed resolution.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#550">550</link>:
	<emphasis>What should the return type of pow(float,int) be?</emphasis>
    </term>
    <listitem><para>In C++11 mode, remove the pow(float,int), etc., signatures.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#586">586</link>:
	<emphasis>string inserter not a formatted function</emphasis>
    </term>
    <listitem><para>Change it to be a formatted output function (i.e. catch exceptions).
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#596">596</link>:
	<emphasis>27.8.1.3 Table 112 omits "a+" and "a+b" modes</emphasis>
    </term>
    <listitem><para>Add the missing modes to fopen_mode.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#630">630</link>:
	<emphasis>arrays of valarray</emphasis>
    </term>
    <listitem><para>Implement the simple resolution.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#660">660</link>:
	<emphasis>Missing bitwise operations</emphasis>
    </term>
    <listitem><para>Add the missing operations.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#691">691</link>:
	<emphasis>const_local_iterator cbegin, cend missing from TR1</emphasis>
    </term>
    <listitem><para>In C++11 mode add cbegin(size_type) and cend(size_type)
		    to the unordered containers.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#693">693</link>:
	<emphasis>std::bitset::all() missing</emphasis>
    </term>
    <listitem><para>Add it, consistently with the discussion.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#695">695</link>:
	<emphasis>ctype&lt;char&gt;::classic_table() not accessible</emphasis>
    </term>
    <listitem><para>Make the member functions table and classic_table public.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#696">696</link>:
	<emphasis>istream::operator&gt;&gt;(int&amp;) broken</emphasis>
    </term>
    <listitem><para>Implement the straightforward resolution.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#761">761</link>:
	<emphasis>unordered_map needs an at() member function</emphasis>
    </term>
    <listitem><para>In C++11 mode, add at() and at() const.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#775">775</link>:
	<emphasis>Tuple indexing should be unsigned?</emphasis>
    </term>
    <listitem><para>Implement the int -&gt; size_t replacements.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#776">776</link>:
	<emphasis>Undescribed assign function of std::array</emphasis>
    </term>
    <listitem><para>In C++11 mode, remove assign, add fill.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#781">781</link>:
	<emphasis>std::complex should add missing C99 functions</emphasis>
    </term>
    <listitem><para>In C++11 mode, add std::proj.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#809">809</link>:
	<emphasis>std::swap should be overloaded for array types</emphasis>
    </term>
    <listitem><para>Add the overload.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#853">853</link>:
	<emphasis>to_string needs updating with zero and one</emphasis>
    </term>
    <listitem><para>Update / add the signatures.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#865">865</link>:
	<emphasis>More algorithms that throw away information</emphasis>
    </term>
    <listitem><para>The traditional HP / SGI return type and value is blessed
		    by the resolution of the DR.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#1339">1339</link>:
       <emphasis>uninitialized_fill_n should return the end of its range</emphasis>
    </term>
    <listitem><para>Return the end of the filled range.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2021">2021</link>:
       <emphasis>Further incorrect uses of <code>result_of</code></emphasis>
    </term>
    <listitem><para>Correctly decay types in signature of <code>std::async</code>.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2049">2049</link>:
	<emphasis><code>is_destructible</code> underspecified</emphasis>
    </term>
    <listitem><para>Handle non-object types.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2056">2056</link>:
	<emphasis>future_errc enums start with value 0 (invalid value for broken_promise)</emphasis>
    </term>
    <listitem><para>Reorder enumerators.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2059">2059</link>:
	<emphasis>C++0x ambiguity problem with map::erase</emphasis>
    </term>
    <listitem><para>Add additional overloads.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2063">2063</link>:
	<emphasis>Contradictory requirements for string move assignment</emphasis>
    </term>
    <listitem><para>Respect propagation trait for move assignment.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2064">2064</link>:
	<emphasis>More noexcept issues in basic_string</emphasis>
    </term>
    <listitem><para>Add noexcept to the comparison operators.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2067">2067</link>:
	<emphasis>packaged_task should have deleted copy c'tor with const parameter</emphasis>
    </term>
    <listitem><para>Fix signatures.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2101">2101</link>:
	<emphasis>Some transformation types can produce impossible types</emphasis>
    </term>
    <listitem><para>Use the referenceable type concept.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2106">2106</link>:
	<emphasis>move_iterator wrapping iterators returning prvalues</emphasis>
    </term>
    <listitem><para>Change the <code>reference</code> type.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2108">2108</link>:
	<emphasis>No way to identify allocator types that always compare equal</emphasis>
    </term>
    <listitem><para>Define and use <code>is_always_equal</code> even for C++11.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2118">2118</link>:
	<emphasis><code>unique_ptr</code> for array does not support cv qualification conversion of actual argument</emphasis>
    </term>
    <listitem><para>Adjust constraints to allow safe conversions.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2132">2132</link>:
	<emphasis><code>std::function</code> ambiguity</emphasis>
    </term>
    <listitem><para>Constrain the constructor to only accept callable types.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2141">2141</link>:
	<emphasis><code>common_type</code> trait produces reference types</emphasis>
    </term>
    <listitem><para>Use <code>decay</code> for the result type.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2144">2144</link>:
	<emphasis>Missing <code>noexcept</code> specification in <code>type_index</code></emphasis>
    </term>
    <listitem><para>Add <code>noexcept</code>
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2145">2145</link>:
	<emphasis><code>error_category</code> default constructor</emphasis>
    </term>
    <listitem><para>Declare a public constexpr constructor.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2162">2162</link>:
	<emphasis><code>allocator_traits::max_size</code> missing <code>noexcept</code></emphasis>
    </term>
    <listitem><para>Add <code>noexcept</code>.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2187">2187</link>:
	<emphasis><code>vector&lt;bool&gt;</code> is missing <code>emplace</code> and <code>emplace_back</code> member functions</emphasis>
    </term>
    <listitem><para>Add <code>emplace</code> and <code>emplace_back</code> member functions.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2196">2196</link>:
	<emphasis>Specification of <code>is_*[copy/move]_[constructible/assignable]</code> unclear for non-referencable types</emphasis>
    </term>
    <listitem><para>Use the referenceable type concept.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2212">2212</link>:
	<emphasis><code>tuple_size</code> for <code>const pair</code> request <code>&lt;tuple&gt;</code> header</emphasis>
    </term>
    <listitem><para>The <code>tuple_size</code> and <code>tuple_element</code>
    partial specializations are defined in <code>&lt;utility&gt;</code> which
    is included by <code>&lt;array&gt;</code>.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2313">2313</link>:
	<emphasis><code>tuple_size</code> should always derive from <code>integral_constant&lt;size_t, N&gt;</code></emphasis>
    </term>
    <listitem><para>Update definitions of the partial specializations for const and volatile types.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2328">2328</link>:
       <emphasis>Rvalue stream extraction should use perfect forwarding</emphasis>
    </term>
    <listitem><para>Use perfect forwarding for right operand.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2329">2329</link>:
       <emphasis><code>regex_match()/regex_search()</code> with <code>match_results</code> should forbid temporary strings</emphasis>
    </term>
    <listitem><para>Add deleted overloads for rvalue strings.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2332">2332</link>:
       <emphasis><code>regex_iterator/regex_token_iterator</code> should forbid temporary regexes</emphasis>
    </term>
    <listitem><para>Add deleted constructors.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2399">2399</link>:
	<emphasis><code>shared_ptr</code>'s constructor from <code>unique_ptr</code> should be constrained</emphasis>
    </term>
    <listitem><para>Constrain the constructor to require convertibility.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2400">2400</link>:
	<emphasis><code>shared_ptr</code>'s <code>get_deleter()</code> should use <code>addressof()</code></emphasis>
    </term>
    <listitem><para>Use <code>addressof</code>.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2401">2401</link>:
	<emphasis><code>std::function</code> needs more <code>noexcept</code></emphasis>
    </term>
    <listitem><para>Add <code>noexcept</code> to the assignment and comparisons.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2407">2407</link>:
       <emphasis><code>packaged_task(allocator_arg_t, const Allocator&amp;, F&amp;&amp;)</code>
                 should neither be constrained nor <code>explicit</code>
       </emphasis>
    </term>
    <listitem><para>Remove <code>explicit</code> from the constructor.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2415">2415</link>:
       <emphasis>Inconsistency between <code>unique_ptr</code> and <code>shared_ptr</code></emphasis>
    </term>
    <listitem><para>Create empty an <code>shared_ptr</code> from an empty
                    <code>unique_ptr</code>.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2418">2418</link>:
       <emphasis><code>apply</code> does not work with member pointers</emphasis>
    </term>
    <listitem><para>Use <code>mem_fn</code> for member pointers.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2440">2440</link>:
       <emphasis><code>seed_seq::size()</code> should be <code>noexcept</code></emphasis>
    </term>
    <listitem><para>Add <code>noexcept</code>.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2454">2454</link>:
       <emphasis>Add <code>raw_storage_iterator::base()</code> member
       </emphasis>
    </term>
    <listitem><para>Add the <code>base()</code> member function.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2455">2455</link>:
       <emphasis>Allocator default construction should be allowed to throw
       </emphasis>
    </term>
    <listitem><para>Make <code>noexcept</code> specifications conditional.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2458">2458</link>:
       <emphasis>N3778 and new library deallocation signatures
       </emphasis>
    </term>
    <listitem><para>Remove unused overloads.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2459">2459</link>:
       <emphasis><code>std::polar</code> should require a non-negative rho
       </emphasis>
    </term>
    <listitem><para>Add debug mode assertion.
    </para></listitem></varlistentry>

    <varlistentry><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../ext/lwg-defects.html#2466">2466</link>:
       <emphasis><code>allocator_traits::max_size()</code> default behavior is incorrect
       </emphasis>
    </term>
    <listitem><para>Divide by the object type.
    </para></listitem></varlistentry>


  </variablelist>

 </section>
  </section>
</chapter>


<!-- Chapter 02 : Setup -->
<chapter xml:id="manual.intro.setup" xreflabel="Setup"><info><title>Setup</title></info>
  <?dbhtml filename="setup.html"?>
  

   <para>To transform libstdc++ sources into installed include files
   and properly built binaries useful for linking to other software is
   a multi-step process. Steps include getting the sources,
   configuring and building the sources, testing, and installation.
   </para>

   <para>The general outline of commands is something like:
   </para>

   <programlisting>
   <replaceable>get gcc sources</replaceable>
   <replaceable>extract into gccsrcdir</replaceable>
   mkdir <replaceable>gccbuilddir</replaceable>
   cd <replaceable>gccbuilddir</replaceable>
   <replaceable>gccsrcdir</replaceable>/configure --prefix=<replaceable>destdir</replaceable> --other-opts...
   make
   make check
   make install
   </programlisting>

   <para>
     Each step is described in more detail in the following sections.
   </para>

  <!-- Section 01 : Prerequisites -->
  <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="xml" href="prerequisites.xml">
  </xi:include>

  <!-- Section 02 : Configure -->
  <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="xml" href="configure.xml">
  </xi:include>

  <!-- Section 03 : Make -->
<section xml:id="manual.intro.setup.make" xreflabel="Make"><info><title>Make</title></info>
  <?dbhtml filename="make.html"?>

   <para>If you have never done this before, you should read the basic
      <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://gcc.gnu.org/install/">GCC Installation
      Instructions</link> first.  Read <emphasis>all of them</emphasis>.
      <emphasis>Twice.</emphasis>
   </para>

<para>Then type: <command>make</command>, and congratulations, you've
started to build.
</para>

</section>

</chapter>

<!-- Chapter 03 : Using -->
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="xml" href="using.xml">
</xi:include>

</part>