R. Wils writes:

> I tried to add text underline to the same lua function;
>
> function Span(el)
>   if FORMAT == "latex" and el.attributes.color then
>     return { pandoc.RawInline("latex", "\\textcolor{" ..
>   el.attributes.color .. "}"), el }
>   elseif FORMAT == "latex" and el.attributes.text-decoration then
>     return { pandoc.RawInline("latex", "\\underline{" ..
>   el.attributes.text-decoration .. "}"), el }
>   end
> end
>
> with input
> [this is my text]{text-decoration=underline}
>
> This gives an error `my_luafilter.lua:5: attempt to perform arithmetic on a
> nil value (field 'text')`
> What did I wrong?

The issue is with `el.attributes.text-decoration`. Minus/hyphens are
special in Lua, so Lua treats this as "substract `decoration` from
`el.attributes.text`. The solution is to use more explicit table-access
syntax: `el.attributes['text-decoration']`.


--
Albert Krewinkel
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