Lua question : how to intercept function call

[TsT]

Hello

I'm trying to implement the missing love feature to draw on different layers.

I have almost finished but I need to improve my way of intercepting love function.

For now I have something like:

Code: Select all

        realfunc = love.graphics.rectangle
        love.graphics.rectangle = function(...)
                myfunc("something", arg)
        end

        myfunc = function(cmd, a)
                realfunc([i][b]a[1], a[2], a[3], a[4][/b][/i])
        end

Is anyone know how to call a function not with one table argument, but with all item of the table as arguments ?

I have try to use loadstring but it's not running when I have symbol (table, function, ...) in item of the table.

Best Regards,

[hagish]

not sure if i understand you correctly but unpack should do it:

Code: Select all

love.graphics.rectangle = function(...)
                myfunc("something", unpack(arg))
end

[bartbes]

I'm not sure, but I thought ... returns all the arguments

Code: Select all

function test(...)
print(...)
end

should call print with all arguments.

PS: posting on PS3

[TsT]

Thanks for all, unpack is exactly what I need

[Lord Tim]

I'm not sure, but I thought ... returns all the arguments

Code: Select all

function test(...)
print(...)
end

should call print with all arguments.

PS: posting on PS3

You just put the "..." in the parenthesis. to access them you use "arg" as a table.

[bartbes]

Got that part, but I've recently found a snippet using ... as argument.

However the lua manual lacks some things, and this is one of them. And what about the __index field? (unless they changed it)
I like the LÖVE documentation more (although there are hidden functions too).

[Kaze]

I'm not sure, but I thought ... returns all the arguments

Code: Select all

function test(...)
print(...)
end

should call print with all arguments.

PS: posting on PS3

You just put the "..." in the parenthesis. to access them you use "arg" as a table.

"..." is the same as "unpack(arg)"

Code: Select all

function dostuff(...)
    stuff1(...)
    stuff2(...)
end