[NTG-context] Can't use MetaFun with mplib anymore

14 Mar 2019

      Dear list,

Something has changed in MetaFun and it can no longer be used in plain LuaTeX,
with neither of

    luatex test.tex
    mtxrun --script plain test.tex

This is the error:

    >> LUATEXFUNCTIONALITY
    >> "mp.print(LUATEXFUNCTIONALITY)"
    ! Equation cannot be performed (numeric=string).

MWE is below, as always.

Cheers, Henri

---

\directlua{
local mpkpse = kpse.new(arg[0], "mpost")

local function finder(name, mode, ftype)
    if mode == "w" then
        return name
    else
        return mpkpse:find_file(name,ftype)
    end
end

local mpx = mplib.new {
    find_file = finder
}
local ret = mpx:execute[[
boolean mplib ; mplib := true ;
input metafun.mp ;
]]

print(ret.log)
}
\bye

[NTG-context] Can't use MetaFun with mplib anymore

Henri Menke