Temple templates with vibe.d support and first D experiences

[John Colvin via Digitalmars-d-learn]

On Wednesday, 18 March 2015 at 08:13:37 UTC, István Zólyomi wrote:
> Hi,
>
> I've been lurking around in the forums for quite a long time 
> now, but only recently tried D for a bit more than some trivial 
> experimentation. Though the documentation of external libraries 
> and the tooling itself is far from a commercial solution in 
> quality, I understand that it's a community effort, so my 
> experience is good in overall.
>
> I really like what I've seen of vibe.d so far. The only strange 
> part was Diet templates: though the concept is not bad at all, 
> it's not practical. Unless you're also a good web designer, you 
> usually start from existing HTML templates, using Diet 
> templates would require a complete rewrite in such cases.
>
> I've seen in some forums that the Temple template engine may be 
> more practical in such cases and it has vibe.d support, so I 
> gave it a try. I have the following function mapped to some URL:
>
> void hello(HTTPServerRequest req, HTTPServerResponse res)
> {
> 	    auto ctx = new TempleContext;
>     ctx.username = "testing";
>
>     // Gives compile error
>     // renderTemple!("Hello <%= var.username %>")(res, ctx);
>
>     // I'd expect this behaves the same, but works fine
>     string content = compile_temple!("Hello <%= var.username 
> %>").toString(ctx);
>     res.writeBody(content);
> }
>
> In the code above, function renderTemplate() gives the 
> following compile error which I could not solve so far:
>
> Compiling using dmd...
> Compiling Temple with Vibed support
> TempleFunc-mixin-1(51): Error: static assert  "Filter does not 
> have a case that accepts a VariantN!32LU"
> TempleFunc-mixin-1(17):        instantiated from here: 
> __temple_buff_filtered_put!(VariantN!32LU)
> ../../../.dub/packages/temple-0.7.3/src/temple/package.d:47: 
> InlineTemplate(1):        instantiated from here: 
> __temple_put_expr!(VariantN!32LU)
> src/temple/temple.d(77):        instantiated from here: 
> TempleFunc!(TempleHtmlFilter)
> ../../../.dub/packages/temple-0.7.3/src/temple/package.d(43):
>    ... (2 instantiations, -v to show) ...
> ../../../.dub/packages/temple-0.7.3/src/temple/vibe.d(53):
>   instantiated from here: Temple!("Hello <%= var.username %>", 
> TempleHtmlFilter)
> source/app.d(...):        instantiated from here: 
> renderTemple!("Hello <%= var.username %>", TempleContext)
>
> I'm using dub to build and run the application. Am I doing 
> something wrong here, or is it something environmental like a 
> library version conflict or wrong D deployment?
>
> thanks
> István

which dmd version?