Status of Experimental C++0x Support in GCC 4.4
GCC provides experimental support for the upcoming ISO C++
standard, C++0x. This support can be enabled with the
-std=c++0x or -std=gnu++0x compiler
options; the former disables GNU extensions.
GCC's C++0x mode tracks the C++0x working paper drafts produced by
the ISO C++ committee, available on the ISO C++ committee's web site
at http://www.open-std.org/jtc1/sc22/wg21/. Since
this standard is still being extended and modified, the feature set
provided by the experimental C++0x mode may vary greatly from one GCC
version to another. No attempts will be made to preserve backward
compatibility with C++0x features whose semantics have changed during
the course of C++0x standardization.
The following table lists which C++0x features are supported in
this release of GCC. For more information about C++0x support in GCC,
please see the C++0x in GCC project
page.
| Language Feature |
Proposal |
Available in GCC 4.4? |
| Rvalue references |
N2118 |
Yes |
Rvalue references for *this |
N2439 |
No |
| Variadic templates |
N2242 |
Yes |
| Extending variadic template template parameters |
N2555 |
Yes |
| Static assertions |
N1720 |
Yes |
auto-typed variables |
N1984 |
No |
Multi-declarator auto |
N1737 |
No |
| Removal of auto as a storage-class specifier |
N2546 |
Yes |
| New function declarator syntax |
N2541 |
No |
| Lambda expressions and closures |
N2550 |
No |
| Declared type of an expression |
N2343 |
Yes |
| Right angle brackets |
N1757 |
Yes |
| Default template arguments for function templates |
DR226 |
Yes |
| Template aliases |
N2258 |
No |
| Extern templates |
N1987 |
Yes |
| Null pointer constant |
N2431 |
No |
| Strongly-typed enums |
N2347 |
No |
| Generalized constant expressions |
N2235 |
No |
| Alignment support |
N2341 |
No |
| Delegating constructors |
N1986 |
No |
| Inheriting constructors |
N2540 |
No |
| Explicit conversion operators |
N2437 |
No |
| New character types |
N2249 |
No |
| Raw and Unicode string literals |
N2442 |
No |
| Extended PODs |
N2342 |
No |
| Initialization of class objects by rvalues |
N1610 |
No |
| Extended friend declarations |
N1791 |
No |
Extending sizeof |
N2253 |
No |
| Universal character name literals |
N2170 |
No |
| Defaulted and deleted functions |
N2346 |
No |
| Inline namespaces |
N2535 |
Yes |
| Unrestricted unions |
N2544 |
No |
| Concurrency |
| Sequence points |
N2239 |
No |
| Atomic operations |
N2427 |
No |
| Memory model |
N2429 |
No |
| Copying and rethrowing exceptions |
N2179 |
No |
| Abandoning a process |
N2440 |
No |
| Allow atomics use in signal handlers |
N2547 |
No |
| C99 Features in C++0x |
__func__ predefined identifier |
N2340 |
Yes |
| C99 preprocessor |
N1653 |
Yes |
long long |
N1811 |
Yes |
| Extended integral types |
N1988 |
No |
Please send FSF & GNU inquiries & questions to
gnu@gnu.org.
There are also other ways
to contact the FSF.
These pages are maintained by
the GCC team.
For questions related to the use of GCC, please consult these web
pages and the GCC manuals. If
that fails, the gcc-help@gcc.gnu.org
mailing list might help.
Please send comments on these web pages and the development of GCC to our
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Verbatim copying and distribution of this entire article is
permitted in any medium, provided this notice is preserved.
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Last modified 2008-03-27
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