<s>
C++	B-Language
Technical	I-Language
Report	I-Language
1	I-Language
(	O
TR1	O
)	O
is	O
the	O
common	O
name	O
for	O
ISO/IEC	O
TR	O
19768	O
,	O
C++	B-Language
Library	O
Extensions	O
,	O
which	O
is	O
a	O
document	O
that	O
proposed	O
additions	O
to	O
the	O
C++	B-Language
standard	I-Language
library	I-Language
for	O
the	O
C++03	B-Language
language	O
standard	O
.	O
</s>
<s>
The	O
additions	O
include	O
regular	B-Language
expressions	I-Language
,	O
smart	B-Language
pointers	I-Language
,	O
hash	B-Algorithm
tables	I-Algorithm
,	O
and	O
random	O
number	O
generators	O
.	O
</s>
<s>
However	O
,	O
most	O
of	O
its	O
proposals	O
became	O
part	O
of	O
the	O
later	O
official	O
standard	O
,	O
C++11	B-Language
.	I-Language
</s>
<s>
Before	O
C++11	B-Language
was	O
standardized	O
,	O
vendors	O
used	O
this	O
document	O
as	O
a	O
guide	O
to	O
create	O
extensions	O
.	O
</s>
<s>
The	O
report	O
's	O
goal	O
was	O
"	O
to	O
build	O
more	O
widespread	O
existing	O
practice	O
for	O
an	O
expanded	O
C++	B-Language
standard	I-Language
library	I-Language
"	O
.	O
</s>
<s>
Compilers	B-Language
did	O
not	O
need	O
to	O
include	O
the	O
TR1	O
components	O
in	O
order	O
to	O
conform	O
to	O
the	O
C++	B-Language
standard	O
,	O
because	O
TR1	O
proposals	O
were	O
not	O
part	O
of	O
the	O
standard	O
itself	O
,	O
only	O
a	O
set	O
of	O
possible	O
additions	O
that	O
were	O
still	O
to	O
be	O
ratified	O
.	O
</s>
<s>
However	O
,	O
most	O
of	O
TR1	O
was	O
available	O
from	O
Boost	B-Language
,	O
and	O
several	O
compiler/library	O
distributors	O
implemented	O
all	O
or	O
some	O
of	O
the	O
components	O
.	O
</s>
<s>
TR1	O
is	O
not	O
the	O
complete	O
list	O
of	O
additions	O
to	O
the	O
library	O
that	O
appeared	O
in	O
C++11	B-Language
.	I-Language
</s>
<s>
For	O
example	O
,	O
C++11	B-Language
includes	O
a	O
thread	O
support	O
library	O
that	O
is	O
not	O
available	O
in	O
TR1	O
.	O
</s>
<s>
The	O
feature	O
was	O
based	O
on	O
Boost.Ref	O
.	O
</s>
<s>
Wrapper	O
references	O
are	O
similar	O
to	O
normal	O
references	O
( ‘&’	O
)	O
of	O
the	O
C++	B-Language
language	I-Language
.	O
</s>
<s>
Smart	B-Language
pointers	I-Language
–	O
adds	O
several	O
classes	O
that	O
simplify	O
object	O
lifetime	O
management	O
in	O
complex	O
cases	O
.	O
</s>
<s>
The	O
proposal	O
is	O
based	O
on	O
Boost	B-Language
Smart	B-Language
Pointer	I-Language
library	O
.	O
</s>
<s>
The	O
feature	O
is	O
based	O
on	O
Boost	B-Language
Bind	O
library	O
.	O
</s>
<s>
Based	O
on	O
Boost	B-Language
Mem	O
Fn	O
library	O
.	O
</s>
<s>
The	O
proposal	O
is	O
based	O
on	O
Boost	B-Language
Type	O
Traits	O
library	O
.	O
</s>
<s>
new	O
<random>	O
header	O
file	O
–	O
variate_generator	O
,	O
mersenne_twister	B-Algorithm
,	O
poisson_distribution	O
,	O
etc	O
.	O
</s>
<s>
Some	O
features	O
of	O
TR1	O
,	O
such	O
as	O
the	O
mathematical	O
special	O
functions	O
and	O
certain	O
C99	O
additions	O
,	O
are	O
not	O
included	O
in	O
the	O
Visual	O
C++	B-Language
implementation	O
of	O
TR1	O
.	O
</s>
<s>
The	O
Mathematical	O
special	O
functions	O
library	O
was	O
not	O
standardized	O
in	O
C++11	B-Language
.	I-Language
</s>
<s>
new	O
<regex>	O
header	O
file	O
–	O
regex	B-Language
,	O
regex_match	O
,	O
regex_search	O
,	O
regex_replace	O
,	O
etc	O
.	O
</s>
<s>
C++	B-Language
is	O
designed	O
to	O
be	O
compatible	O
with	O
the	O
C	B-Language
programming	I-Language
language	I-Language
,	O
but	O
is	O
not	O
a	O
strict	O
superset	O
of	O
C	B-Language
due	O
to	O
diverging	O
standards	O
.	O
</s>
<s>
TR1	O
attempts	O
to	O
reconcile	O
some	O
of	O
these	O
differences	O
through	O
additions	O
to	O
various	O
headers	O
in	O
the	O
C++	B-Language
library	O
,	O
such	O
as	O
<complex>, <locale>, <cmath>	O
,	O
etc	O
.	O
</s>
<s>
These	O
changes	O
help	O
to	O
bring	O
C++	B-Language
more	O
in	O
line	O
with	O
the	O
C99	O
version	O
of	O
the	O
C	B-Language
standard	O
(	O
not	O
all	O
parts	O
of	O
C99	O
are	O
included	O
in	O
TR1	O
)	O
.	O
</s>
<s>
The	O
Asio	B-Language
C++	I-Language
library	I-Language
(	O
networking	O
)	O
.	O
</s>
<s>
Filesystem	O
Library	O
–	O
Based	O
on	O
the	O
Boost	B-Language
Filesystem	O
Library	O
,	O
for	O
query/manipulation	O
of	O
paths	O
,	O
files	O
and	O
directories	O
.	O
</s>
<s>
Instead	O
,	O
enhancements	O
to	O
C++	B-Language
will	O
be	O
published	O
in	O
a	O
number	O
of	O
Technical	O
Specifications	O
.	O
</s>
<s>
Some	O
of	O
the	O
proposals	O
listed	O
above	O
are	O
already	O
included	O
in	O
the	O
C++	B-Language
standard	O
or	O
in	O
draft	O
versions	O
of	O
the	O
Technical	O
Specifications	O
.	O
</s>
