Re: Explanation needed for setfenv replacement for Lua 5.2

["E. Toernig" <froese@...>]

| lib.Interpreter( function(_ENV)
|    AddItem "hello!"
|    AddItem(AN_UPVALUE)
|    AddItem "Hope You Enjoy!"
|
|    PrintResult()  --> hello! This is a silly DSL! Hope You Enjoy!
| end)
 
> It is still too boilerplate IMO when explaining how to write a DSL 
> snippet to a non-programmer

Just an idea: How about misusing the for statement?

| for _ENV in lib.Interpreter do
|    AddItem "hello!"
|    AddItem(AN_UPVALUE)
|    AddItem "Hope You Enjoy!"
|
|    PrintResult()  --> hello! This is a silly DSL! Hope You Enjoy!
| end

Still the _ENV but it's readable ;-)

Full code below:
------------------------------------------------------
function Interpreter(_, second_iteration)
    if second_iteration then return end

    local private_data = {}

    return {
        AddItem = function(item) table.insert(private_data, item) end,
        PrintResult = function() print(table.concat(private_data, " ")) end,
    }
end

-- client code

local AN_UPVALUE = "This is a silly DSL!"

for _ENV in Interpreter do
    AddItem "hello!"
    AddItem(AN_UPVALUE)
    AddItem "Hope You Enjoy!"

    PrintResult()  --> hello! This is a silly DSL! Hope You Enjoy!
end
------------------------------------------------------

Ciao, ET.