<s>
Intelligent	B-Application
code	I-Application
completion	I-Application
is	O
a	O
context-aware	O
code	O
completion	O
feature	O
in	O
some	O
programming	B-Application
environments	I-Application
that	O
speeds	O
up	O
the	O
process	O
of	O
coding	O
applications	O
by	O
reducing	O
typos	O
and	O
other	O
common	O
mistakes	O
.	O
</s>
<s>
Intelligent	B-Application
code	I-Application
completion	I-Application
and	O
related	O
tools	O
serve	O
as	O
documentation	O
and	O
disambiguation	O
for	O
variable	O
names	O
,	O
functions	O
,	O
and	O
methods	O
,	O
using	O
reflection	B-Language
.	O
</s>
<s>
The	O
feature	O
appears	O
in	O
many	O
programming	B-Application
environments	I-Application
.	O
</s>
<s>
Implementations	O
include	O
"	O
autocomplete	O
+	O
"	O
in	O
Atom	B-Application
,	O
and	O
IntelliSense	O
in	O
Visual	B-Language
Studio	I-Language
Code	I-Language
.	O
</s>
<s>
Intelligent	B-Application
code	I-Application
completion	I-Application
,	O
which	O
is	O
similar	O
to	O
other	O
autocompletion	O
systems	O
,	O
is	O
a	O
convenient	O
way	O
to	O
access	O
descriptions	O
of	O
functions	O
—	O
and	O
in	O
particular	O
their	O
parameter	O
lists	O
.	O
</s>
<s>
Intelligent	B-Application
code	I-Application
completion	I-Application
uses	O
an	O
automatically	O
generated	O
in-memory	O
database	O
of	O
classes	O
,	O
variable	O
names	O
,	O
and	O
other	O
constructs	O
that	O
given	O
computer	O
code	O
defines	O
or	O
references	O
.	O
</s>
<s>
The	O
user	O
can	O
either	O
accept	O
the	O
suggestion	O
by	O
typing	O
a	O
statement-completion	O
character	O
(	O
or	O
)	O
or	O
a	O
language-specific	O
marker	O
(	O
such	O
as	O
the	O
semicolon	O
for	O
C++	B-Language
)	O
,	O
or	O
continue	O
typing	O
the	O
name	O
.	O
</s>
<s>
The	O
feature	O
also	O
lets	O
users	O
select	O
from	O
a	O
number	O
of	O
overloaded	B-Language
functions	I-Language
in	O
languages	O
that	O
support	O
object-oriented	B-Language
programming	I-Language
.	O
</s>
<s>
Some	O
code	O
editing	O
software	O
provide	O
intelligent	B-Application
code	I-Application
completion	I-Application
through	O
a	O
Language	O
Server	O
Protocol	O
(	O
LSP	O
)	O
server	O
.	O
</s>
<s>
Research	O
on	O
intelligent	B-Application
code	I-Application
completion	I-Application
began	O
in	O
1957	O
,	O
with	O
spelling	O
checkers	O
for	O
bitmap	O
images	O
of	O
cursive	O
writing	O
and	O
special	O
applications	O
to	O
find	O
records	O
in	O
databases	O
despite	O
incorrect	O
entries	O
.	O
</s>
<s>
Gorin	O
wrote	O
the	O
program	O
in	O
assembly	B-Language
for	O
faster	O
action	O
;	O
he	O
made	O
it	O
by	O
searching	O
a	O
word	O
list	O
for	O
plausible	O
correct	O
spellings	O
that	O
differ	O
by	O
a	O
single	O
letter	O
or	O
adjacent-letter	O
transpositions	O
,	O
and	O
presenting	O
them	O
to	O
the	O
user	O
.	O
</s>
<s>
SPELL	O
and	O
its	O
algorithms	O
and	O
data	O
structures	O
inspired	O
the	O
Unix	B-Application
program	O
Ispell	B-Application
.	O
</s>
<s>
IntelliSense	O
is	O
Microsoft	O
's	O
implementation	O
of	O
code	O
completion	O
,	O
best	O
known	O
in	O
Visual	B-Application
Studio	I-Application
.	O
</s>
<s>
Initially	O
,	O
Visual	B-Language
Basic	I-Language
IDE	B-Application
was	O
the	O
primary	O
"	O
test	O
bed	O
"	O
for	O
the	O
technology	O
,	O
but	O
IntelliSense	O
was	O
incorporated	O
into	O
Visual	B-Application
FoxPro	I-Application
and	O
Visual	B-Application
C++	I-Application
in	O
the	O
Visual	B-Application
Studio	I-Application
97	O
timeframe	O
(	O
one	O
revision	O
after	O
first	O
seen	O
in	O
Visual	B-Language
Basic	I-Language
)	O
.	O
</s>
<s>
Because	O
it	O
was	O
based	O
on	O
the	O
introspection	O
capabilities	O
of	O
COM	B-Application
,	O
the	O
Visual	B-Language
Basic	I-Language
versions	O
of	O
IntelliSense	O
were	O
always	O
more	O
robust	O
and	O
complete	O
than	O
the	O
5.0	O
and	O
6.0	O
(	O
97	O
and	O
98	O
in	O
the	O
Visual	B-Application
Studio	I-Application
naming	O
sequence	O
)	O
versions	O
of	O
Visual	B-Application
C++	I-Application
,	O
which	O
did	O
not	O
have	O
the	O
benefit	O
of	O
being	O
entirely	O
based	O
on	O
COM	B-Application
.	O
</s>
<s>
These	O
shortcomings	O
(	O
criticized	O
by	O
many	O
VC++	B-Application
developers	O
since	O
the	O
97	O
release	O
)	O
have	O
been	O
largely	O
corrected	O
in	O
the	O
.NET	O
product	O
lines	O
.	O
</s>
<s>
For	O
example	O
,	O
one	O
of	O
the	O
most	O
requested	O
capabilities	O
missing	O
from	O
the	O
pre-.NET	O
products	O
was	O
support	O
for	O
templates	B-Language
,	O
which	O
is	O
now	O
fully	O
implemented	O
.	O
</s>
<s>
IntelliSense	O
has	O
entered	O
a	O
new	O
phase	O
of	O
development	O
with	O
the	O
unified	O
Visual	B-Application
Studio.NET	I-Application
environment	O
first	O
released	O
in	O
2001	O
,	O
augmented	O
by	O
the	O
more	O
powerful	O
introspection	O
and	O
code	O
documentation	O
capabilities	O
provided	O
by	O
the	O
.NET	O
framework	O
.	O
</s>
<s>
IntelliSense	O
is	O
now	O
supported	O
by	O
the	O
Visual	B-Application
Studio	I-Application
editors	O
for	O
C++	B-Language
,	O
C#	B-Application
,	O
J#	B-Language
,	O
Visual	B-Language
Basic	I-Language
,	O
XML	B-Protocol
,	O
HTML	B-Language
and	O
XSLT	B-Application
among	O
others	O
.	O
</s>
<s>
As	O
of	O
Visual	B-Application
Studio	I-Application
2005	O
,	O
IntelliSense	O
is	O
now	O
activated	O
by	O
default	O
when	O
the	O
user	O
begins	O
to	O
type	O
,	O
instead	O
of	O
requiring	O
marker	O
characters	O
(	O
though	O
this	O
behavior	O
can	O
be	O
turned	O
off	O
)	O
.	O
</s>
<s>
The	O
IDE	B-Application
has	O
the	O
capability	O
of	O
inferring	O
a	O
greater	O
amount	O
of	O
context	O
based	O
on	O
what	O
the	O
developer	O
is	O
typing	O
,	O
to	O
the	O
point	O
that	O
basic	O
language	O
constructs	O
such	O
as	O
and	O
are	O
also	O
included	O
in	O
the	O
choice	O
list	O
.	O
</s>
<s>
Initially	O
available	O
as	O
an	O
extension	O
for	O
C#	B-Application
only	O
,	O
it	O
is	O
expected	O
to	O
be	O
built	O
in	O
to	O
future	O
releases	O
of	O
Visual	B-Application
Studio	I-Application
.	O
</s>
<s>
Visual	B-Application
Studio	I-Application
2022	O
includes	O
artificial-intelligence	O
features	O
that	O
can	O
automatically	O
suggest	O
entire	O
lines	O
of	O
code	O
based	O
on	O
surrounding	O
context	O
.	O
</s>
<s>
Other	O
Microsoft	O
products	O
that	O
incorporate	O
IntelliSense	O
include	O
Expression	B-Application
Web	I-Application
,	O
FrontPage	B-Operating_System
2003	I-Operating_System
,	O
Small	B-Language
Basic	I-Language
,	O
the	O
Visual	B-Language
Basic	I-Language
for	I-Language
Applications	I-Language
IDEs	O
in	O
the	O
Microsoft	B-Application
Office	I-Application
products	O
,	O
Visual	B-Language
Studio	I-Language
Code	I-Language
and	O
many	O
others	O
.	O
</s>
<s>
The	O
Eclipse	B-Application
IDE	I-Application
has	O
code	O
completion	O
tools	O
that	O
come	O
packaged	O
with	O
the	O
program	O
.	O
</s>
<s>
It	O
includes	O
notable	O
support	O
for	O
Java	O
,	O
C++	B-Language
,	O
and	O
JavaScript	O
code	O
authoring	O
.	O
</s>
<s>
The	O
Code	O
Recommenders	O
Eclipse	B-Application
project	O
used	O
to	O
provide	O
powerful	O
intelligent	O
completion	O
,	O
but	O
due	O
to	O
lack	O
of	O
resources	O
,	O
was	O
dropped	O
in	O
Eclipse	B-Application
2018	O
–	O
12	O
,	O
and	O
then	O
archived	O
in	O
July	O
2019	O
.	O
</s>
<s>
Vim	B-Application
Intellisense	O
is	O
an	O
advanced	O
code	O
completion	O
system	O
for	O
the	O
Vim	B-Application
editor	I-Application
.	O
</s>
<s>
Assume	O
a	O
C++	B-Language
application	O
being	O
edited	O
in	O
Visual	B-Application
Studio	I-Application
has	O
a	O
class	O
with	O
some	O
member	O
functions	O
:	O
</s>
<s>
In	O
Visual	B-Application
Studio	I-Application
this	O
displays	O
the	O
entire	O
application	O
domain	O
object	O
model	O
available	O
to	O
the	O
developer	O
.	O
</s>
