in the 'docs/html' subdirectory. It contains brief building instructions and
notes on how to configure the library in interesting ways.
+Instructions for configuring and building appear in
+docs/html/install.html.
-Instructions for configuring and building this snapshot appear
-in docs/html/install.html.
-
-This directory contains the files needed to create [a still broken
-subset of] an ISO Standard C++ Library.
+This directory contains the files needed to create an ISO Standard C++
+Library.
It has subdirectories:
Files in HTML and text format that document usage, quirks of the
implementation, and contributor checklists.
- include/bits
- Files included by standard headers and by other files in
- the bits directory. Includes a set of files bits/std_xxxx.h
- that implement the standard headers <xxxx>.
-
include/std
Files meant to be found by #include <name> directives in
standard-conforming user programs.
- include/ext
- Headers that define extensions to the standard library. No
- standard header refers to any of them.
-
- include/backward
- Headers provided for backward compatibility, such as <iostream.h>.
- They are not used in this library.
-
include/c
Headers intended to directly include standard C headers.
[NB: this can be enabled via --enable-cheaders=c]
defined there into the _C_legacy namespace.
[NB: this can be enabled via --enable-cheaders=c_shadow]
+ include/bits
+ Files included by standard headers and by other files in
+ the bits directory. Includes a set of files bits/std_xxxx.h
+ that implement the standard headers <xxxx>.
+
+ include/backward
+ Headers provided for backward compatibility, such as <iostream.h>.
+ They are not used in this library.
+
+ include/ext
+ Headers that define extensions to the standard library. No
+ standard header refers to any of them.
+
src
Files that are used in constructing the library, but are not
installed.
config/io
config/locale
-Files needed only to construct the library, but not installed,
-are in src/. Files to be copied as part of an installation are
-all found in the subdirectories mentioned above. (A configure
-script may link files from another directory into one of these.)
+In addition, three subdirectories are convenience libraries:
+
+ libio
+ Contains the subset of the GNU libio library needed for
+ C++. Currently not used.
+
+ libmath
+ Support routines needed for C++ math. Only needed if the
+ underlying "C" implementation is weak or looses.
+
+ libsupc++
+ Contains the runtime library for C++, including exception
+ handling and memory allocation and deallocation, RTTI, terminate
+ handlers, etc.
Note that glibc also has a bits/ subdirectory. We will either
need to be careful not to collide with names in its bits/
- exception specifications need to be reviewed for all parts of the
library support and utility areas, particularly <new>.
-- exception/stdexcept headers will do, but are not cleanly
-implemented. Also, some kind of consensus needs to be established on
-if the presence of stdexcept should be assumed in iostreams
-headers. V3 currently takes the position that references to stdexcept
-classes necessitates the inclusion of stdexcept, other library vendors
-seem less inclined.
-
- scoping/linking issues WRT to C structs need to be worked out. See
Nathan's commentary on cantrip, http://www.cantrip.org/cheaders.html
be implemented incorrectly, or need things like
operator==(__normal_iterator, const char*&), and swap(vector)
-- SGI iterator/allocator classes are not strictly conforming. In
-particular, raw_storage_iterator, mem_fun1_ref_t are all problem
-areas.
-
- auto_ptr: seems to be some disagreement on what is
standards-conformant behavior, specially on conversion operators.
-- vswprintf, vwprintf, wprintf, wscanf, wcsftime, swscanf, fgetws,
-fputwc, fputws, fwide, fwprintf, fwscanf, getwc, getwchar, putwc, etc:
-C library wchar_t functionality.
-
-- facets heirarchies seem on occasion give odd errors to conformace
-tests. Need to test that they are constructed in a strictly-conforming
-manner.
-
-- stuff like `LC_CTYPE' is not found. Locale oddness?
-
- header optimizations to keep compile times reasonable are most
certainly detracting from full conformance, as many templatized
definitions are squired away and pre-instantiated, so that the
compiler doesn't have to parse them. Areas effected: valarray, string,
all of iostreams and locales.
-- basic_string<wchar_T> not implemented
-
-- ostreambuf_iterator has not been made standards-conformant (both
-char and wchar_t) In particular, look at
-time_put::put(OutIt, ios_base&, char, const tm*, const char*, const
-char*) const
-
- C-related issues WRT to libio and filepos, mbstate_t. Need to
straighten this stuff out with the glibc-2.2 libio. Also may need to
define operators for mbstate_t so that 'mbstate_t& == mbstate_t' is
something that can be done.
-- codecvt<wchar_t> has not been adequently handled in terms of the
-locale bits. (The io bits are done, with the exception of one
-ostream<wchar_t> inserter for char.
-
-- bool locale::operator() looks to be non-conformant
-
-- num_get<char>::do_get<user_defined_type>
- num_put<char>::do_put<user_defined_type>
-num_put<char, char *>::do_put(char *, ios_base &, char, long double) const
-num_put<char, char *>::do_put(char *, ios_base &, char, double) const
-num_put<char, char *>::do_put(char *, ios_base &, char, void const *) const
-etc.
-appear to be broken, or headers mashed, or undefined.
-
-- locale and std::combine not working correctly
- template <class _Facet> class locale locale::combine(const locale &)
-
-- ctype_byname<char>: check to make sure derivation standards-conformant.
-
-- codecvt::unshift not working for char, wchar_t
-
-- no match for money_base::pattern &[int]
-
-- money_get::do_get weirded out for wchar_t
-
- looks like deque::get_allocator not standards conformant or deque
allocator non-standard.
- priority_queue conversions may be non-conformant
-- istream_iterator uses 2 arguments, should it be 4?
-
- 'do the right thing' ctor fixing needs to be done for string. This
is still subject to some debate on the library issues list, so I
suggest punting till the dust clears.
-- the ctype and "tolower" "isspace" stuff really needs to be sorted
-out. A portable, cross platform interface needs to be defined. A
-"fixincludes"-like solution needs to be put into place to prune
-headers. The "C" functions need to be able to work in std:: and "C"
-namespaces.
-
- complex<float> seems to be the single largest source of internal
compiler errors when compiling the c++ library across non-x86
platforms. Somebody needs to make sure the complex support builtin to
class complex<float>& complex<float>::operator-=<float>(const complex<float> &)
class complex<float>& complex<float>::operator*=<float>(const complex<float> &)
-- appears as if the following extraction operators are undefined:
-operator>>(istream, complex<float>&)
-operator>>(istream, complex<double>&)
-operator>>(istream, complex<long double>&)
-operator>>(istream, complex<user_defined_type>&)
-sqrt (const complex<T>& x)
-
- Protect valarray::result_type (not Standard) and make it work with
the various helper classes.
- Make sure `valarray<bool> & == _Expr<_BinClos<logical_or,_ValArray,_ValArray,double,double>,bool>'
is defined
-- long double std_cmath stuff looks weak
-
-- fwide not declared. C++ wchar_t issues completely unaddressed.
-
- known issues WRT to io and corner cases with the buffers. This is
still subject to interpretation, and I think the current
implementation is credible.
- add MT support for locale, string, istream, ostream
-- specialize functions that use_facet<> calls on failure for the required
- facets, and construct them lazily so unused facets need not be constructed
- when the locale is.
-
-- <cmath>: provide missing names.
-
- provide testsuites for numerics.
- add FAQ entries -- improve the install instructions
git://gcc.gnu.org / gcc.git / commitdiff