Lucid - WHERE clause

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1

Hello, does Lucid allow to compute html parts?

To clarify, in usual Haskell, it is possible to define a function as:

f x = y + z
  where
    y = 2*x
    z = x*x

But, in Lucid templates, it seems to only be possible some simpler calculations:

getPage :: String -> Html ()
getPage msg = html_ $ do
  p_ (toHtml $ msg)

I would like to know if it is possible to use a “where” clause in Lucid html generation for complex computations.

2

Sure, you can put a where clause under the line that starts with p_.

1 Like
3

I am interested about more complex cases, for example, how to implement something like this:

div_ $ do myElem
  where myElem = p_ "hello, Lucid Where clause"

This raises a parse error.

4

Why not just:

let myElem = p_ "hello, Lucid Where clause"
            ...
in div_ $ do myElem
1 Like
6

Actually, this “let - in” combination works on the html level. Probably, also the where combination would probably work too.