Change 20070919-dda-f by [EMAIL PROTECTED] on 2007-09-19 13:41:48 EDT
in /Users/dda/laszlo/src/svn/openlaszlo/trunk/WEB-INF/lps/server/
src/org/openlaszlo/sc
for http://svn.openlaszlo.org/openlaszlo/trunk/WEB-INF/lps/
server/src/org/openlaszlo/sc
Summary: generatePredictableTemps option for script compiler
New Features:
added new option generatePredictableTemps that allows for direct
comparison
of compiler outputs.
Bugs Fixed:
Technical Reviewer: ptw
QA Reviewer: (pending)
Doc Reviewer: (pending)
Documentation:
Release Notes:
Details:
The new option, is specified to the compiler like this:
--option generatePredictableTemps=true
Note that this option is *not* the default, nor is it recommended
for anyone
that is not doing side-by-side tests of the compiler. When used,
it may
in fact *break* functionality. It provides some capabilities to
assist
in internal testing, and specifically for testing the refactoring
work.
When this is option is set, variables that normally use a UUID-
like naming (for uniqueness between runs)
are changed to have predictable names, that is names that will be
identical each time
the compiler is rerun. Such predictable names (like "$lzsc$1",
"$lzsc$2", etc.) will
collide with the same names used in other compilations that appear
in the same applications,
which may cause problems at runtime. This option uses a simple
increment to generate
names. Seeding the random number generator with a fixed value,
like 0, would also work
but the output will appear more obfuscated.
The intention is that this option can be used when making an
architectural or 'cleanup'
change to the compiler that is not intended to change any
behavior. When this change
is done, a suitably complete test input can be fed to the old and
new compiler, both
with the generatePredictableTemps option, and comparisons of
outputs can be made directly.
Tests:
Files:
M Compiler.java
M JavascriptGenerator.java
M CodeGenerator.java
Changeset: http://svn.openlaszlo.org/openlaszlo/patches/20070919-dda-
f.tar
--
Don Anderson
Java/C/C++, Berkeley DB, systems consultant
Voice: 617-547-7881
Email: [EMAIL PROTECTED]
WWW: http://www.ddanderson.com
