<s>
The	O
DMS	B-Application
Software	I-Application
Reengineering	I-Application
Toolkit	I-Application
is	O
a	O
proprietary	O
set	O
of	O
program	B-Application
transformation	I-Application
tools	O
available	O
for	O
automating	O
custom	O
source	O
program	O
analysis	O
,	O
modification	O
,	O
translation	O
or	O
generation	O
of	O
software	O
systems	O
for	O
arbitrary	O
mixtures	O
of	O
source	O
languages	O
for	O
large	O
scale	O
software	O
systems	O
.	O
</s>
<s>
DMS	O
has	O
been	O
used	O
to	O
implement	O
domain-specific	B-Language
languages	I-Language
(	O
such	O
as	O
code	O
generation	O
for	O
factory	O
control	O
)	O
,	O
test	O
coverage	O
and	O
profiling	O
tools	O
,	O
clone	O
detection	O
,	O
language	O
migration	O
tools	O
,	O
C++	B-Language
component	O
reengineering.	O
,	O
and	O
for	O
research	O
into	O
difficult	O
topics	O
such	O
as	O
refactoring	O
C++	B-Language
reliably	O
.	O
</s>
<s>
The	O
toolkit	O
provides	O
means	O
for	O
defining	O
language	O
grammars	O
and	O
will	O
produce	O
parsers	B-Language
which	O
automatically	O
construct	O
abstract	B-Data_Structure
syntax	I-Data_Structure
trees	I-Data_Structure
(	O
ASTs	O
)	O
,	O
and	O
prettyprinters	B-Application
to	O
convert	O
original	O
or	O
modified	O
ASTs	O
back	O
into	O
compilable	O
source	O
text	O
.	O
</s>
<s>
The	O
parse	O
trees	O
capture	O
,	O
and	O
the	O
prettyprinters	B-Application
regenerate	O
,	O
complete	O
detail	O
about	O
the	O
original	O
source	O
program	O
,	O
including	O
source	O
position	O
,	O
comments	O
,	O
radix	O
and	O
format	O
of	O
numbers	O
,	O
etc.	O
,	O
to	O
ensure	O
that	O
regenerated	O
source	O
text	O
is	O
as	O
recognizable	O
to	O
a	O
programmer	O
as	O
the	O
original	O
text	O
modulo	O
any	O
applied	O
transformations	O
.	O
</s>
<s>
DMS	O
uses	O
GLR	B-Application
parsing	O
technology	O
with	O
semantic	O
predicates	O
.	O
</s>
<s>
This	O
enables	O
it	O
to	O
handle	O
all	O
context-free	O
grammars	O
as	O
well	O
as	O
most	O
non-context-free	O
language	O
syntaxes	O
,	O
such	O
as	O
Fortran	B-Application
,	O
which	O
requires	O
matching	O
of	O
multiple	O
DO	O
loops	O
with	O
shared	O
CONTINUE	O
statements	O
by	O
label	O
to	O
produce	O
ASTs	O
for	O
correctly	O
nested	O
loops	O
as	O
it	O
parses	O
.	O
</s>
<s>
DMS	O
has	O
a	O
variety	O
of	O
predefined	O
language	O
front	O
ends	O
,	O
covering	O
most	O
real	O
dialects	O
of	O
C	B-Language
and	O
C++	B-Language
including	O
C++0x	B-Language
,	O
C#	B-Application
,	O
Java	B-Language
,	O
Python	B-Language
,	O
PHP	B-Application
,	O
EGL	B-Language
,	O
Fortran	B-Application
,	O
COBOL	B-Application
,	O
Visual	B-Language
Basic	I-Language
,	O
Verilog	B-Language
,	O
VHDL	B-Language
and	O
some	O
20	O
or	O
more	O
other	O
languages	O
.	O
</s>
<s>
DMS	O
can	O
handle	O
ASCII	B-Protocol
,	O
ISO-8859	O
,	O
UTF-8	O
,	O
UTF-16	O
,	O
EBCDIC	B-Language
,	O
Shift-JIS	O
and	O
a	O
variety	O
of	O
Microsoft	O
character	O
encodings	O
.	O
</s>
<s>
DMS	O
provides	O
attribute	B-Application
grammar	I-Application
evaluators	O
for	O
computing	O
custom	O
analyses	O
over	O
ASTs	O
,	O
such	O
as	O
metrics	O
,	O
and	O
includes	O
support	O
for	O
symbol	B-Application
table	I-Application
construction	O
.	O
</s>
<s>
Other	O
program	O
facts	O
can	O
be	O
extracted	O
by	O
built-in	O
control	O
-	O
and	O
data	O
-	O
flow	O
analysis	O
engines	O
,	O
local	O
and	O
global	O
pointer	O
analysis	O
,	O
whole-program	O
call	B-Application
graph	I-Application
extraction	O
,	O
and	O
symbolic	O
range	O
analysis	O
by	O
abstract	O
interpretation	O
.	O
</s>
<s>
DMS	O
is	O
implemented	O
in	O
a	O
parallel	B-Operating_System
programming	I-Operating_System
language	O
,	O
PARLANSE	B-Application
,	O
which	O
allows	O
using	O
symmetric	B-Operating_System
multiprocessing	I-Operating_System
to	O
speed	O
up	O
large	O
analyses	O
and	O
conversions	O
.	O
</s>
<s>
Changes	O
to	O
ASTs	O
can	O
be	O
accomplished	O
by	O
both	O
procedural	O
methods	O
coded	O
in	O
PARLANSE	B-Application
and	O
source-to-source	O
tree	O
transformations	O
coded	O
as	O
rewrite	O
rules	O
using	O
surface-syntax	O
conditioned	O
by	O
any	O
extracted	O
program	O
facts	O
,	O
using	O
DMS	O
's	O
Rule	O
Specification	O
Language	O
(	O
RSL	O
)	O
.	O
</s>
<s>
A	O
rewrite	O
rule	O
for	O
C	B-Language
to	O
replace	O
a	O
complex	O
condition	O
by	O
the	O
?	O
</s>
<s>
Target	O
language	O
(	O
e.g.	O
,	O
C	B-Language
)	O
surface	O
syntax	O
is	O
coded	O
inside	O
meta-quotes	O
"	O
,	O
to	O
separate	O
rewrite-rule	O
syntax	O
from	O
that	O
of	O
the	O
target	O
language	O
.	O
</s>
<s>
The	O
ruleset	O
is	O
focused	O
on	O
portions	O
of	O
the	O
program	O
by	O
metaprograms	O
coded	O
in	O
PARLANSE	B-Application
.	O
</s>
<s>
A	O
complete	O
example	O
of	O
a	O
language	O
definition	O
and	O
source-to-source	O
transformation	O
rules	O
defined	O
and	O
applied	O
is	O
shown	O
using	O
high	O
school	O
algebra	O
and	O
a	O
bit	O
of	O
calculus	O
as	O
a	O
domain-specific	B-Language
language	I-Language
.	O
</s>
