Vibe.d Diet Templatesand Forms

[Steven Schveighoffer]

On 1/19/23 6:24 PM, seany wrote:
> Hello
> 
> Please consider this diet template:
> 
>          doctype html
>          html(lang="es", dir="ltr")
>              head
>                  meta(name="viewport", content="width=device-width, 
> user-scalable=no, initial-scale=1.0")
>                  meta(charset="utf-8")
>                  link(rel="stylesheet", type="text/css", href="main.css")
>                  <link 
> href="https://fonts.googleapis.com/css2?family=Montserrat:wght@400;700;800&display=swap" rel="stylesheet">

Did you mean to include straight HTML here? I don't think that is supported.

> Please notice the line `form(id= ...`. This line is causing the 
> following error:
> 
> 
> 
> 
>          login.dt(29,45): Error: found `method` when expecting `;` 
> following `return` statement
>          login.dt(29,51): Error: found `=` instead of statement
>          login.dt(28,12): Error: missing closing `)` after `if ("form"`
>          login.dt(28,21): Error: found `)` when expecting `;` following 
> statement
>          login.dt(28,36): Error: found `method` when expecting `)`
>          login.dt(28,42): Error: found `=` when expecting `)`
>          login.dt(28,43): Error: found `""` when expecting `)`
>          login.dt(28,45): Error: found `)` instead of statement
> /root/.dub/packages/diet-ng-1.8.1/diet-ng/source/diet/html.d(246,8): 
> Error: template     instance 
> `diet.html.compileHTMLDietFileString!("login.dt", contents,     
> DefaultDietFilters).exec!(StreamOutputRange!(InterfaceProxy!(OutputStream), 1024LU))` error instantiating
> /root/.dub/packages/vibe-d-0.9.5/vibe-d/http/vibe/http/server.d(351,66):        instantiated from here: `compileHTMLDietFileString!(StreamOutputRange!(InterfaceProxy!(OutputStream), 1024LU))`
>          source/app.d(41,5):        instantiated from here: 
> `render!"login.dt"`
> 
> 
> What is the problem? How can I resolve it? Thank you.

The easiest way to see what the diet compiler is producing is to 
uncomment the line that outputs the compiled file to the console during 
compilation. That is located here: 
https://github.com/rejectedsoftware/diet-ng/blob/856bf6d75127955565b3b5edd9b1f4418b8ec7c3/source/diet/html.d#L234

With that being said, how diet works is to convert the diet template 
directly into D code. It relies on the translation to produce valid D 
code (no specialized parsing or semantic-aware processing is done, it's 
just a direct translation from diet AST to D). What is happening here is 
the diet compiler is not producing valid D code. This can happen when 
there are bugs, but usually only when there are D "escapes", which don't 
correctly set up the syntax (like if you include a curly brace, which 
isn't expected)

However, in your code, I don't see any "escapes", so I'm not sure what 
could cause it there.

I will note that most of the time, when I get diet errors like that the 
error is not on that specific line, but on something that happened 
before to confuse the D compiler. That html `link` node might be the 
issue, but again, I'm not sure what is intended there.

-Steve