Re: partial evaluation

[Peter Wang <tjaden@...>]

paul@theV.net <paul@theV.net> wrote:
> I have the following code:
> 
...
> 
> But Lua says
> 
> error: cannot access a variable in outer scope;
>   last token read: `f' at line 7 in file `a.lua'

You need to use "upvalues" (see the manual), e.g.

add = function (x, y)
        return x + y
    end

partial = function (f, i)
        local c = function (j)
                        return %f(%i, j)
                  end
        return c
    end

add_one = partial(add, 1)

print (add_one(2))

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