New Diet template engine almost complete, ready for comments

[Sönke Ludwig via Digitalmars-d-announce]

The Diet template language is aimed at providing a way to define 
procedurally generated HTML/XML pages (or other output formats), with 
minimal visual noise. Syntax and feature set are heavily inspired by 
Jade <http://jade-lang.org/>, but instead of JavaScript, all expressions 
and statements are D statements, and everything that can be done at 
compile-time is done at compile-time.

Vibe.d still contains the original implementation, which was written 
around the limitations of DMD's CTFE engine back years ago, and is 
basically a monolithic parser+generator with little flexibility and a 
number of convenience features missing, because of their implementation 
complexity. The new implementation has been rewritten cleanly, with 
separate parser, modifier and generator modules, working on a common DOM 
tree intermediate representation.

The major new features/improvements are:

   - No external dependencies other than Phobos
   - Supports inline and nested tags syntax
   - Supports string interpolations within filter nodes (falls back to
     runtime filters)
   - Supports AngularJS special attribute names
   - Extensible/configurable with traits structures
   - Uses less memory during compilation (this one was a real surprise)
   - (Unit) tested from the start
   - Supports arbitrary uses other than generating HTML, for example we
    use it similar to QML/XAML for our internal UI framework

The API documentation can be shown ba running DUB:
    dub fetch diet-ng --version=1.0.0-alpha.2
    dub run diet-ng -b ddox

You can try the library directly, or together with the latest alpha 
release of vibe.d (0.7.30-alpha.3). Simply add a dependency to 
"diet-ng", version "~>1.0.0-alpha.2". Vibe.d will automatically re-route 
render!(...) calls to diet-ng.

A small example with just the most essential features is shown in the 
README:
https://code.dlang.org/packages/diet-ng

More complex real-world examples:
https://github.com/rejectedsoftware/vibed.org/tree/master/views
https://github.com/rejectedsoftware/ddox/tree/master/views

Any comments/requests regarding the feature set or API are highly welcome!