With the end of the world in a few days, it’s time to flush the what’s new log for DWScript.
There are two major items that will be discussed in future posts:
Also the old Indy-based webserver demo is being replaced by one based on Synopse high-performance http server classes.
Recently stumbled upon node-webkit, an open-source from Intel Open Source Technology Center, which is deliciously “simple”: combine a standalone webkit (Chromium) build and node.js into a runtime.
Webkit/Chromium brings a high-performance HTML5 environment with JavaScript JITting compiler, WebGL, Audio, hardware accelerated Canvas, camera access, etc.
DWScript now has a new “unit namespace” feature, which aims at killing several birds with one stone:
Latest DWScript SVN introduces support a new “for var” syntax extension for loops.
It combines the loop with the loop variable declaration (type-inferred), while scoping the variable to the loop.
The syntax of “for to/downto” loops is thus extended to:
A new DWScript 2.3 preview 2 7zip (422 kB) is available for download for those that don’t use the DWScript SVN. This version should be the last before a release candidate for 2.3. As the lead version is Delphi XE, users of Delphi 2009, 2010, XE2 and XE3 are especially encouraged to report any issues they encounter. FreePascal support is still considered experimental at this moment.
A while ago I asked about the name of TObject ancestor, well, it’s now live in the SVN and its name is ‘Object‘.
Object is thus the new root class, above TObject. Eventually, it’ll be the ancestor for every other type.
DWScript (SVN version) should now compile under Delphi XE3, thanks to Steffen Binas for providing a workaround for a compiler bug (internal error URW1147).
The workaround will alas reduce performance, for a proper fix, a futureXE3 update will be required,see QC #109187.
While I’m at it, I might also raise awareness of another XE3 bug, QC #108942 (internal error G9413).
(on a side note, my XE3 trial expired, so any fixes or workarounds for XE3 will have to come from you guys)
dwsJSON is a unit that supports JSON parsing/creating, it’s part of DWScript but relatively “standalone”, in that if you add it in your Delphi (or FPC) projects, it won’t pull the whole of DWScript library, and thus can be used anywhere you need.
The JSON parser in dwsJSON generates an object tree based on TdwsJSONValue (and its subclasses), you can also create such a tree from scratch and use it to spit out JSON. There is also a low-level JSON writer for fast, write-only streaming. All classes support full Unicode (in Delphi) as well as very long strings (like a base64 streamed image).
Here is the news summary for September 2012, top new items are initial FreePascal support and introduction of lambdas syntax.
Serg recent wrote an introduction to unit testing under Lazarus, showing how everything is there, but just that little bit “off” because of different unit names between FPCUnit and DUnit.
Not being a fan of ifdef, the prospect of having unit tests “uses” sections littered with ifdef did not attract me, so I made a little adapter unit to keep the “uses” sections clean.