Module:LuaCall

local p={}

function p.main(frame) local parent=frame.getParent(frame) or {} local reserved_value={} local reserved_function,reserved_contents for k,v in pairs(parent.args or {}) do       _G[k]=tonumber(v) or v -- transfer every parameter directly to the global variable table end for k,v in pairs(frame.args or {}) do       _G[k]=tonumber(v) or v -- transfer every parameter directly to the global variable table end --- Alas Scribunto does NOT implement coroutines, according to    --- http://www.mediawiki.org/wiki/Extension:Scribunto/Lua_reference_manual#string.format --- this will not stop us from trying to implement one single lousy function call if _G[1] then reserved_function,reserved_contents=mw.ustring.match(_G[1],"^%s*(%a[^%s%(]*)%(([^%)]*)%)%s*$") end if reserved_contents then local reserved_counter=0 repeat reserved_counter=reserved_counter+1 reserved_value[reserved_counter]=_G[mw.ustring.match(reserved_contents,"([^%,]+)")] reserved_contents=mw.ustring.match(reserved_contents,"[^%,]+,(.*)$") until not reserved_contents end local reserved_arraypart=_G while mw.ustring.match(reserved_function,"%.") do       reserved_functionpart,reserved_function=mw.ustring.match(reserved_function,"^(%a[^%.]*)%.(.*)$") reserved_arraypart=reserved_arraypart[reserved_functionpart] end local reserved_call=reserved_arraypart[reserved_function] if type(reserved_call)~="function" then return tostring(reserved_call) else reserved_output={reserved_call(unpack(reserved_value))} return reserved_output[reserved_return or 1] end end

local function tonumberOrString(v) return tonumber(v) or v:gsub("^\\", "", 1) end

local function callWithTonumberOrStringOnPairs(f, ...) local args = {} for _, v in ... do		table.insert(args, tonumberOrString(v)) end return (f(unpack(args))) end

--[[

-- ipairsAtOffset

-- This is an iterator for arrays. It can be used like ipairs, but with -- specified i as first index to iterate. i is an offset from 1 --

--]] local function ipairsAtOffset(t, i)	local f, s, i0 = ipairs(t) return f, s, i0+i end

local function get(s) local G = _G; for _ in mw.text.gsplit(		mw.text.trim(s, '%s'), '%s*%.%s*'	) do		G = G[_] end return G end

--[[

-- call -- -- This function is usually useful for debugging template parameters. -- Prefix parameter with backslash (\) to force interpreting parameter as string. -- The leading backslash will be removed before passed to Lua function. -- -- Example: --    will return results of mw.log('a', 1, 2, 3) --    will return results of mw.logObject('a', 321, '321', ' \\321 ') -- -- This example show the debugging to see which Unicode characters are allowed in template parameters, --    return 97 --    return 65533 --    return 65533 --    return 0xfffd --    return 0x007e --    return 0x007f --    return 0x0080 --    return 0x00a0 --

--]] function p.call(frame) return callWithTonumberOrStringOnPairs(get(frame.args[1]),		ipairsAtOffset(frame.args, 1)	) end

--[[

-- get -- -- Example: --    will return value of math.pi --     will return value of math.pi --     will return value of _G[' math '].pi --     will return value of _G[' math.pi '] --    will return value of obj.a['5'].c --     will return value of obj.a[5].c --

--]] function p.get(frame) -- #frame.args always return 0, regardless of number of unnamed -- template parameters, so check manually instead if frame.args[2] == nil then -- not do tonumber for this args style, -- always treat it as string, -- so 'obj.1' will mean obj['1'] rather obj[1] return get(frame.args[1]) else local G = _G for _, v in ipairs(frame.args) do			G = G[tonumberOrString(v)] end return G	end end

--[[

-- invoke -- -- This function is used by Template:Invoke --

--]] function p.invoke(frame) local func local offset if frame.args[1] ~= nil then local m = require('Module:' .. frame.args[1]) if frame.args[2] ~= nil then func = m[frame.args[2]] frame.args = frame:getParent.args offset = 0 else frame.args = frame:getParent.args func = m[frame.args[1]] offset = 1 end else frame.args = frame:getParent.args func = require('Module:' .. frame.args[1])[frame.args[2]] offset = 2 end local args = {} for _, v in ipairsAtOffset(frame.args, offset) do		table.insert(args, v)	end frame.args = args return func(frame) end

return p