<s>
C2x	B-Language
is	O
an	O
informal	O
name	O
for	O
the	O
next	O
(	O
after	O
C17	O
)	O
major	O
C	B-Language
language	I-Language
standard	O
revision	O
.	O
</s>
<s>
The	O
first	O
WG14	O
meeting	O
for	O
the	O
C2x	B-Language
draft	O
was	O
held	O
in	O
October	O
2019	O
,	O
then	O
virtual	O
remote	O
meetings	O
were	O
held	O
due	O
to	O
COVID-19	O
pandemic	O
in	O
March/April	O
2020	O
,	O
October/November	O
2020	O
,	O
March/April	O
2021	O
,	O
August/September	O
2021	O
,	O
November/December	O
2021	O
,	O
January/February	O
2022	O
,	O
May	O
2022	O
,	O
July	O
2022	O
,	O
January	O
2023	O
.	O
</s>
<s>
add	O
memset_explicit( )	O
function	O
in	O
<string.h>	O
to	O
erase	O
sensitive	O
data	O
,	O
where	O
memory	O
store	O
must	O
always	O
be	O
performed	O
regardless	O
of	O
optimizations	O
.	O
</s>
<s>
add	O
memccpy( )	O
function	O
in	O
<string.h>	O
to	O
efficiently	O
concatenate	O
strings	O
-	O
similar	O
to	O
POSIX	O
and	O
SVID	B-Operating_System
C	B-Language
extensions	O
.	O
</s>
<s>
add	O
strdup( )	O
and	O
strndup( )	O
functions	O
in	O
<string.h>	O
to	O
allocate	O
a	O
copy	O
of	O
a	O
string	O
–	O
similar	O
to	O
POSIX	O
and	O
SVID	B-Operating_System
C	B-Language
extensions	O
.	O
</s>
<s>
add	O
memalignment( )	O
function	O
in	O
<stdlib.h>	O
to	O
determine	O
the	O
byte	O
alignment	O
of	O
a	O
pointer	O
.	O
</s>
<s>
Both	O
directives	O
were	O
added	O
to	O
C++23	B-Language
and	O
GCC	B-Application
12	O
too	O
.	O
</s>
<s>
add	O
functional	O
macro	O
for	O
variadic	B-Language
macros	I-Language
which	O
expands	O
to	O
its	O
argument	O
only	O
if	O
a	O
variadic	O
argument	O
has	O
been	O
passed	O
to	O
the	O
containing	O
macro	O
.	O
</s>
<s>
Variably-modified	O
types	O
(	O
but	O
not	O
VLAs	B-Data_Structure
which	O
are	O
automatic	O
variables	O
allocated	O
on	O
the	O
stack	O
)	O
become	O
a	O
mandatory	O
feature	O
.	O
</s>
<s>
the	O
meaning	O
of	O
the	O
keyword	O
was	O
changed	O
to	O
cause	O
type	O
inference	O
while	O
also	O
retaining	O
its	O
old	O
meaning	O
of	O
a	O
storage	B-Language
class	I-Language
specifier	I-Language
if	O
used	O
alongside	O
a	O
type	O
.	O
</s>
<s>
add	O
the	O
ability	O
to	O
specify	O
the	O
underlying	O
type	O
of	O
an	O
enum	B-Language
.	O
</s>
<s>
add	O
C++11	B-Language
style	O
attribute	O
syntax	O
using	O
double	O
square	O
brackets	O
.	O
</s>
<s>
Add	O
attributes	O
,	O
,	O
,	O
and	O
attribute	O
for	O
compatibility	O
with	O
C++11	B-Language
,	O
then	O
deprecate	O
,	O
,	O
header	O
<stdnoreturn.h>	O
features	O
introduced	O
in	O
C11	O
.	O
</s>
<s>
Duplicate	O
attributes	O
are	O
allowed	O
for	O
compatibility	O
with	O
C++23	B-Language
.	O
</s>
<s>
add	O
u8	O
prefix	O
for	O
character	O
literals	O
to	O
represent	O
UTF-8	O
encoding	O
for	O
compatibility	O
with	O
C++17	B-Language
.	O
</s>
<s>
add	O
and	O
preprocessing	O
directives	O
for	O
compatibility	O
with	O
C++23	B-Language
.	O
</s>
<s>
Zero	O
initialization	O
with	O
 {  } 	O
(	O
including	O
initialization	O
of	O
VLAs	B-Data_Structure
)	O
.	O
</s>
<s>
The	O
constexpr	O
specifier	O
for	O
objects	O
but	O
not	O
functions	O
,	O
unlike	O
C++'s	O
equivalent	O
.	O
</s>
<s>
variadic	B-Language
functions	I-Language
no	O
longer	O
need	O
a	O
named	O
argument	O
before	O
the	O
ellipsis	O
and	O
the	O
macro	O
no	O
longer	O
needs	O
a	O
second	O
argument	O
nor	O
does	O
it	O
evaluate	O
any	O
argument	O
after	O
the	O
first	O
one	O
if	O
present	O
.	O
</s>
<s>
allow	O
storage	B-Language
class	I-Language
specifiers	I-Language
to	O
appear	O
in	O
compound	O
literal	O
definition	O
.	O
</s>
<s>
Remove	O
representations	O
for	O
signed	O
integers	O
other	O
than	O
two	B-General_Concept
's	I-General_Concept
complement	I-General_Concept
.	O
</s>
<s>
Two	B-General_Concept
's	I-General_Concept
complement	I-General_Concept
signed	O
integer	O
representation	O
will	O
be	O
required	O
.	O
</s>
<s>
The	O
GCC	B-Application
9	O
,	O
Clang	B-Application
9.0	O
,	O
and	O
Pelles	O
C	B-Language
11.00	O
compilers	O
implement	O
an	O
experimental	O
compiler	O
flag	O
to	O
support	O
this	O
standard	O
.	O
</s>
