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digitalmars.D.announce - New Diet template engine almost complete, ready for comments

reply =?UTF-8?Q?S=c3=b6nke_Ludwig?= <sludwig outerproduct.org> writes:
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!
Jul 25 2016
next sibling parent Stefan Koch <uplink.coder googlemail.com> writes:
On Monday, 25 July 2016 at 09:29:38 UTC, Sönke Ludwig wrote:
 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.

 [...]
This is great news. diet-ng is so much cleaner!
Jul 25 2016
prev sibling next sibling parent rikki cattermole <rikki cattermole.co.nz> writes:
Hmm, I wonder if it could be extended to also do json as well as xml like.
Jul 25 2016
prev sibling next sibling parent lqjglkqjsg <lqjglkqghjghjjsg lkdsf.od> writes:
On Monday, 25 July 2016 at 09:29:38 UTC, Sönke Ludwig wrote:
 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.
 [...]
 Any comments/requests regarding the feature set or API are 
 highly welcome!
I think I'm gonna test it to make my GH blog. It looks perfectly adapted.
Jul 25 2016
prev sibling next sibling parent reply Karabuta <karabutaworld gmail.com> writes:
On Monday, 25 July 2016 at 09:29:38 UTC, Sönke Ludwig wrote:
 The Diet template language is aimed at providing a way to ...
   - Supports AngularJS special attribute names
Is there a way to get react JS to work with vibe.d in anyway(server-side)?
Jul 25 2016
parent Sebastiaan Koppe <mail skoppe.eu> writes:
On Monday, 25 July 2016 at 20:42:51 UTC, Karabuta wrote:
 On Monday, 25 July 2016 at 09:29:38 UTC, Sönke Ludwig wrote:
 The Diet template language is aimed at providing a way to ...
   - Supports AngularJS special attribute names
Is there a way to get react JS to work with vibe.d in anyway(server-side)?
Without a JS engine that is going to be pretty hard. Or ugly. Basically you would be duplicating a lot of stuff. I would probably use node.js to do an initial render. And keep all the data/api endpoints in vibe.
Jul 25 2016
prev sibling next sibling parent reply Puming <zhaopuming gmail.com> writes:
On Monday, 25 July 2016 at 09:29:38 UTC, Sönke Ludwig wrote:
 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.

 [...]
A feature I want the most for Diet is the ability to parse Diet templates at RUNTIME instead of compile time with a switch, similar to Regex/CtRegex. In this way one can do quick turnarounds in dev mode, tweaking little corners of the pages, and then when a page is finished, it can be switched to compile mode for faster render time. Do you think this is feasible?
Jul 25 2016
next sibling parent Rory McGuire via Digitalmars-d-announce writes:
On Tue, Jul 26, 2016 at 5:22 AM, Puming via Digitalmars-d-announce <
digitalmars-d-announce puremagic.com> wrote:

 On Monday, 25 July 2016 at 09:29:38 UTC, S=C3=B6nke Ludwig wrote:

 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 Jad=
e <
 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.

 [...]
A feature I want the most for Diet is the ability to parse Diet templates at RUNTIME instead of compile time with a switch, similar to Regex/CtRege=
x.
 In this way one can do quick turnarounds in dev mode, tweaking little
 corners of the pages, and then when a page is finished, it can be switche=
d
 to compile mode for faster render time.

 Do you think this is feasible?
Hi Puming, You could use some sort of dialect of JS that is close to D, and then alter the diet template engine so that is doesn't evaluate the code sections with some sort of CT switch. Or you could use my Jaded templates which is basically the same but runs at compile time or runtime (at runtime you would again have to use a language with an interpreter.) I think if you took, vibe.d/diet-ng + arsd/jsvar as your compile time stack, you could find a common denominator so that you could use (node.js + webpack + pug) to do the fast (live) edits of the templates.
Jul 25 2016
prev sibling parent reply =?UTF-8?Q?S=c3=b6nke_Ludwig?= <sludwig outerproduct.org> writes:
Am 26.07.2016 um 05:22 schrieb Puming:
 On Monday, 25 July 2016 at 09:29:38 UTC, Sönke Ludwig wrote:
 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.

 [...]
A feature I want the most for Diet is the ability to parse Diet templates at RUNTIME instead of compile time with a switch, similar to Regex/CtRegex. In this way one can do quick turnarounds in dev mode, tweaking little corners of the pages, and then when a page is finished, it can be switched to compile mode for faster render time. Do you think this is feasible?
A real runtime solution would require a D runtime interpreter or JIT compiler. There would be an alternative solution based on compiling each template to a shared library and then dynamically recompiling/reloading those as required, but that currently doesn't work due to the alias parameter based interface of render!(...). However, what should work well is a combination of https://github.com/dlang/dub/pull/446 and https://github.com/rejectedsoftware/vibe.d/pull/1385 - I'll merge the latter one into vibe.d master today. It will require to store session information and similar things in an external store, and on Linux the Gold linker should be used for speed, but then it should be almost as good as a runtime solution.
Jul 25 2016
next sibling parent Rory McGuire via Digitalmars-d-announce writes:
On Tue, Jul 26, 2016 at 7:54 AM, S=C3=B6nke Ludwig <
digitalmars-d-announce puremagic.com> wrote:

 Am 26.07.2016 um 05:22 schrieb Puming:

 On Monday, 25 July 2016 at 09:29:38 UTC, S=C3=B6nke Ludwig wrote:

 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.

 [...]
A feature I want the most for Diet is the ability to parse Diet templates at RUNTIME instead of compile time with a switch, similar to Regex/CtRegex. In this way one can do quick turnarounds in dev mode, tweaking little corners of the pages, and then when a page is finished, it can be switched to compile mode for faster render time. Do you think this is feasible?
A real runtime solution would require a D runtime interpreter or JIT compiler. There would be an alternative solution based on compiling each template to a shared library and then dynamically recompiling/reloading those as required, but that currently doesn't work due to the alias parameter based interface of render!(...). However, what should work well is a combination of https://github.com/dlang/dub/pull/446 and https://github.com/rejectedsoftware/vibe.d/pull/1385 - I'll merge the latter one into vibe.d master today. It will require to store session information and similar things in an external store, and on Linux the Gol=
d
 linker should be used for speed, but then it should be almost as good as =
a
 runtime solution.
!! nice, this is going to make my work life so much easier. Thanks S=C3=B6nke!
Jul 25 2016
prev sibling next sibling parent Rory McGuire via Digitalmars-d-announce writes:
On Tue, Jul 26, 2016 at 7:54 AM, S=C3=B6nke Ludwig <
digitalmars-d-announce puremagic.com> wrote:

 [snip]
and on Linux the Gold linker should be used for speed, but then it should
 be almost as good as a runtime solution.
Note on using Gold on linux. You can use lflags "-fuse-ld=3Dgold", to get d= ub to link your project using gold if you are using dmd.
Jul 25 2016
prev sibling next sibling parent Puming <zhaopuming gmail.com> writes:
On Tuesday, 26 July 2016 at 05:54:39 UTC, Sönke Ludwig wrote:
 Am 26.07.2016 um 05:22 schrieb Puming:
 [...]
A real runtime solution would require a D runtime interpreter or JIT compiler. There would be an alternative solution based on compiling each template to a shared library and then dynamically recompiling/reloading those as required, but that currently doesn't work due to the alias parameter based interface of render!(...). However, what should work well is a combination of https://github.com/dlang/dub/pull/446 and https://github.com/rejectedsoftware/vibe.d/pull/1385 - I'll merge the latter one into vibe.d master today. It will require to store session information and similar things in an external store, and on Linux the Gold linker should be used for speed, but then it should be almost as good as a runtime solution.
Thanks!Shared lib reloading is good. Looking forward to it fully working :-)
Jul 25 2016
prev sibling parent =?UTF-8?Q?S=c3=b6nke_Ludwig?= <sludwig outerproduct.org> writes:
Am 26.07.2016 um 07:54 schrieb Sönke Ludwig:
 However, what should work well is a combination of
 https://github.com/dlang/dub/pull/446 and
 https://github.com/rejectedsoftware/vibe.d/pull/1385 - I'll merge the
 latter one into vibe.d master today.
I decided against putting it into vibe.d and instead re-implemented it for diet-ng. It is available in 1.0.0-beta.1 now. See the README section for a description: https://code.dlang.org/packages/diet-ng
Jul 28 2016
prev sibling next sibling parent reply Chris <wendlec tcd.ie> writes:
On Monday, 25 July 2016 at 09:29:38 UTC, Sönke Ludwig wrote:
 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!
Great stuff! Very much appreciated. Btw, the link to jade-lang.org (don't click!) leads to a dodgy business homepage atm. The right address is http://jade-lang.com/
Jul 28 2016
next sibling parent reply Rory McGuire via Digitalmars-d-announce writes:
On Thu, Jul 28, 2016 at 3:26 PM, Chris via Digitalmars-d-announce <
digitalmars-d-announce puremagic.com> wrote:
 Great stuff! Very much appreciated. Btw, the link to jade-lang.org (don't
 click!) leads to a dodgy business homepage atm. The right address is

 http://jade-lang.com/
Also: Renaming jade -> pug #2184 https://github.com/pugjs/pug/issues/2184
Jul 28 2016
parent rikki cattermole <rikki cattermole.co.nz> writes:
On 29/07/2016 1:57 AM, Rory McGuire via Digitalmars-d-announce wrote:
 On Thu, Jul 28, 2016 at 3:26 PM, Chris via Digitalmars-d-announce
 <digitalmars-d-announce puremagic.com
 <mailto:digitalmars-d-announce puremagic.com>> wrote:

     Great stuff! Very much appreciated. Btw, the link to jade-lang.org
     <http://jade-lang.org> (don't click!) leads to a dodgy business
     homepage atm. The right address is

     http://jade-lang.com/


 Also:

 Renaming jade -> pug #2184
 https://github.com/pugjs/pug/issues/2184
Hehehehe, I was wondering when this would come up :) They are only like 2.5km away from me.
Jul 28 2016
prev sibling parent =?UTF-8?Q?S=c3=b6nke_Ludwig?= <sludwig+d outerproduct.org> writes:
Am 28.07.2016 um 15:26 schrieb Chris:
 On Monday, 25 July 2016 at 09:29:38 UTC, Sönke Ludwig wrote:
 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!
Great stuff! Very much appreciated. Btw, the link to jade-lang.org (don't click!) leads to a dodgy business homepage atm. The right address is http://jade-lang.com/
Oh, dang! Thanks for mentioning this. Fortunately I copy/pasted the right link to the README.
Jul 28 2016
prev sibling parent reply WhatMeWorry <kheaser gmail.com> writes:
On Monday, 25 July 2016 at 09:29:38 UTC, Sönke Ludwig wrote:
 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,
Is "Diet template" a D/Vibe unique language? I can't find anything to contradict that view, but just wanted to sure. Every time I try and look it up on google, it takes me to weight loss stuff :) Good name though.
Jul 28 2016
parent reply =?UTF-8?Q?S=c3=b6nke_Ludwig?= <sludwig outerproduct.org> writes:
Am 28.07.2016 um 20:07 schrieb WhatMeWorry:
 On Monday, 25 July 2016 at 09:29:38 UTC, Sönke Ludwig wrote:
 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,
Is "Diet template" a D/Vibe unique language? I can't find anything to contradict that view, but just wanted to sure. Every time I try and look it up on google, it takes me to weight loss stuff :) Good name though.
Yes, it started out as vibe.d exclusive (now it's properly decoupled from it). For Google it's probably not popular enough, atm, but I've registered diet-lang.org, which should help a lot once it gets filled with content.
Jul 28 2016
parent reply Chris <wendlec tcd.ie> writes:
Talking about diets, will reShop[1] be available for Android an 
iOS too? You could extend it by adding "health tips" (add fruit & 
veg automatically), a calorie counter (for single items and the 
whole list) ;)

http://rejectedsoftware.com/products/reshop
Jul 29 2016
parent =?UTF-8?Q?S=c3=b6nke_Ludwig?= <sludwig outerproduct.org> writes:
Am 29.07.2016 um 13:28 schrieb Chris:
 Talking about diets, will reShop[1] be available for Android an iOS too?
 You could extend it by adding "health tips" (add fruit & veg
 automatically), a calorie counter (for single items and the whole list) ;)

 http://rejectedsoftware.com/products/reshop
Yeah, diet/health tips are always a hot topic, I think we even talked about something like that at some point ;) Porting it to those platforms was the initial idea. But since both BB10 and WP are more or less dead now, the main feature of providing full cross-platform synchronization of the lists became a moot point (there are plenty of solutions for Android/iOS already). And then it also really was just a little test project anyway.
Jul 29 2016