<s>
The	O
Extensible	B-Application
Embeddable	I-Application
Language	I-Application
(	O
EEL	B-Application
)	O
is	O
a	O
scripting	B-Language
and	O
programming	O
language	O
in	O
development	O
by	O
David	O
Olofson	O
.	O
</s>
<s>
EEL	B-Application
is	O
intended	O
for	O
scripting	B-Language
in	O
realtime	B-General_Concept
systems	I-General_Concept
with	O
cycle	O
rates	O
in	O
the	O
kHz	O
range	O
,	O
such	O
as	O
musical	O
synthesizers	O
and	O
industrial	O
control	O
systems	O
,	O
but	O
also	O
aspires	O
to	O
be	O
usable	O
as	O
a	O
platform	B-Operating_System
independent	I-Operating_System
general	O
purpose	O
programming	O
language	O
.	O
</s>
<s>
The	O
first	O
incarnation	O
of	O
EEL	B-Application
was	O
in	O
the	O
form	O
of	O
a	O
simple	O
parser	O
for	O
structured	O
audio	O
definitions	O
,	O
used	O
in	O
the	O
sound	O
engine	O
of	O
the	O
Free	B-License
and	I-License
Open	I-License
Source	I-License
game	B-Application
Kobo	O
Deluxe	O
,	O
an	O
SDL	B-Operating_System
port	O
of	O
the	O
X11	B-Operating_System
game	B-Application
XKobo	O
.	O
</s>
<s>
This	O
was	O
a	O
simple	O
interpreter	B-Application
with	O
very	O
limited	O
flow	O
control	O
,	O
and	O
a	O
syntax	O
that	O
's	O
quite	O
different	O
from	O
that	O
of	O
current	O
versions	O
.	O
</s>
<s>
This	O
initial	O
branch	O
of	O
EEL	B-Application
was	O
first	O
released	O
in	O
2002	O
,	O
and	O
is	O
still	O
used	O
in	O
Kobo	O
Deluxe	O
as	O
of	O
version	O
0.5.1	O
.	O
</s>
<s>
In	O
December	O
2003	O
,	O
EEL	B-Application
was	O
split	O
off	O
into	O
a	O
stand-alone	O
project	O
and	O
subject	O
to	O
a	O
major	O
rewrite	O
,	O
in	O
order	O
to	O
be	O
used	O
for	O
real	O
time	O
scripting	B-Language
in	O
an	O
embedded	B-Architecture
rheology	O
application	O
.	O
</s>
<s>
This	O
is	O
where	O
the	O
switch	O
from	O
interpreter	B-Application
to	O
compiler/VM	O
was	O
made	O
,	O
and	O
the	O
actual	O
programming	O
language	O
EEL	B-Application
materialized	O
.	O
</s>
<s>
Since	O
then	O
,	O
EEL	B-Application
has	O
evolved	O
slowly	O
,	O
driven	O
mostly	O
by	O
the	O
personal	O
and	O
professional	O
needs	O
of	O
its	O
author	O
.	O
</s>
<s>
The	O
language	O
is	O
not	O
strictly	O
designed	O
for	O
any	O
particular	O
programming	O
paradigm	O
,	O
but	O
supports	O
object	B-Language
oriented	I-Language
programming	I-Language
,	O
or	O
more	O
specifically	O
,	O
prototype-based	B-Application
programming	I-Application
,	O
through	O
a	O
minimal	O
set	O
of	O
syntax	O
sugar	O
features	O
.	O
</s>
<s>
Other	O
styles	O
and	O
paradigms	O
of	O
programming	O
,	O
such	O
as	O
functional	B-Language
,	O
modular	B-Architecture
and	O
metaprogramming	B-Application
are	O
also	O
supported	O
.	O
</s>
<s>
As	O
a	O
result	O
of	O
avoiding	O
pointers	O
and	O
providing	O
fully	O
managed	O
structured	O
data	O
types	O
,	O
EEL	B-Application
is	O
"	O
safe	O
"	O
in	O
the	O
sense	O
that	O
EEL	B-Application
programs	O
should	O
not	O
be	O
able	O
to	O
crash	O
the	O
virtual	B-Architecture
machine	I-Architecture
or	O
the	O
host	O
application	O
.	O
</s>
<s>
C-like	O
syntax	O
.	O
</s>
<s>
Exception	B-General_Concept
handling	I-General_Concept
.	O
</s>
<s>
table	O
-	O
associative	B-Application
array	I-Application
.	O
</s>
<s>
EEL	B-Application
source	O
code	O
is	O
compiled	B-Language
into	O
bytecode	O
for	O
a	O
custom	O
VM	B-Architecture
,	O
which	O
has	O
a	O
relatively	O
high	O
level	O
instruction	O
set	O
designed	O
to	O
minimize	O
instruction	O
count	O
and	O
thus	O
overhead	O
.	O
</s>
<s>
The	O
EEL	B-Application
VM	B-Architecture
is	O
register	B-Application
based	I-Application
and	O
"	O
stackless	O
"	O
,	O
as	O
in	O
not	O
relying	O
on	O
the	O
C	B-Language
call	B-General_Concept
stack	I-General_Concept
for	O
managing	O
VM	B-Architecture
contexts	O
.	O
</s>
<s>
The	O
VM	B-Architecture
uses	O
"	O
limbo	O
lists	O
"	O
to	O
keep	O
track	O
of	O
intermediate	O
objects	O
created	O
inside	O
expressions	O
and	O
the	O
like	O
,	O
which	O
greatly	O
simplifies	O
exception	B-General_Concept
handling	I-General_Concept
,	O
and	O
eliminates	O
the	O
need	O
for	O
active	O
reference	O
counting	O
in	O
every	O
single	O
operation	O
.	O
</s>
<s>
Kobo	O
Deluxe	O
is	O
an	O
application	O
of	O
EEL	B-Application
.	O
</s>
