Difference between revisions of "Module:Arguments"

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21 bytes added ,  12:52, 2 February 2014
Created page with "-- This module provides easy processing of arguments passed to Scribunto from #invoke. -- It is intended for use by other Lua modules, and should not be called from #invoke di..."
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(Copied from w:Module:Arguments (590466411))
(Created page with "-- This module provides easy processing of arguments passed to Scribunto from #invoke. -- It is intended for use by other Lua modules, and should not be called from #invoke di...")
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-- This module provides easy processing of arguments passed to Scribunto from #invoke.
-- This module provides easy processing of arguments passed to Scribunto from #invoke.
-- It is intended for use by other Lua modules, and should not be called from #invoke directly.
-- It is intended for use by other Lua modules, and should not be called from #invoke directly.
 
local libraryUtil = require('libraryUtil')
local libraryUtil = require('libraryUtil')
local checkType = libraryUtil.checkType
local checkType = libraryUtil.checkType
 
local arguments = {}
local arguments = {}
 
local nilArg = {} -- Used for memoizing nil arguments in metaArgs.
local nilArg = {} -- Used for memoizing nil arguments in metaArgs.
 
-- Generate four different tidyVal functions, so that we don't have to check the options every time we call it.
-- Generate four different tidyVal functions, so that we don't have to check the options every time we call it.
 
local function tidyValDefault(key, val)
local function tidyValDefault(key, val)
if type(val) == 'string' then
if type(val) == 'string' then
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end
end
end
end
 
local function tidyValTrimOnly(key, val)
local function tidyValTrimOnly(key, val)
if type(val) == 'string' then
if type(val) == 'string' then
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end
end
end
end
 
local function tidyValRemoveBlanksOnly(key, val)
local function tidyValRemoveBlanksOnly(key, val)
if type(val) == 'string' then
if type(val) == 'string' then
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end
end
end
end
 
local function tidyValNoChange(key, val)
local function tidyValNoChange(key, val)
return val
return val
end
end
 
function arguments.getArgs(frame, options)
function arguments.getArgs(frame, options)
checkType('getArgs', 1, frame, 'table', true)
checkType('getArgs', 1, frame, 'table', true)
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frame = frame or {}
frame = frame or {}
options = options or {}
options = options or {}
 
-- Get the arguments from the frame object if available. If the frame object is not available, we are being called
-- Get the arguments from the frame object if available. If the frame object is not available, we are being called
-- from another Lua module or from the debug console, so assign the args to a new variable so we can differentiate them.
-- from another Lua module or from the debug console, so assign the args to a new variable so we can differentiate them.
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luaArgs = frame
luaArgs = frame
end
end
 
-- Set up the args and metaArgs tables. args will be the one accessed from functions, and metaArgs will hold the actual arguments.
-- Set up the args and metaArgs tables. args will be the one accessed from functions, and metaArgs will hold the actual arguments.
-- The metatable connects the two together.
-- The metatable connects the two together.
local args, metaArgs, metatable = {}, {}, {}
local args, metaArgs, metatable = {}, {}, {}
setmetatable(args, metatable)
setmetatable(args, metatable)
 
-- Generate the tidyVal function. If it has been specified by the user, we use that; if not, we choose one of four functions
-- Generate the tidyVal function. If it has been specified by the user, we use that; if not, we choose one of four functions
-- depending on the options chosen. This is so that we don't have to call the options table every time the function is called.
-- depending on the options chosen. This is so that we don't have to call the options table every time the function is called.
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end
end
end
end
 
local function mergeArgs(iterator, tables)
local function mergeArgs(iterator, tables)
-- Accepts multiple tables as input and merges their keys and values into one table using the specified iterator.
-- Accepts multiple tables as input and merges their keys and values into one table using the specified iterator.
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end
end
end
end
 
-- Set the order of precedence of the argument tables. If the variables are nil, nothing will be added to the table,
-- Set the order of precedence of the argument tables. If the variables are nil, nothing will be added to the table,
-- which is how we avoid clashes between the frame/parent args and the Lua args.
-- which is how we avoid clashes between the frame/parent args and the Lua args.
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argTables[#argTables + 1] = pargs
argTables[#argTables + 1] = pargs
argTables[#argTables + 1] = luaArgs
argTables[#argTables + 1] = luaArgs
 
--[[
--[[
-- Define metatable behaviour. Arguments are memoized in the metaArgs table, and are only fetched from the
-- Define metatable behaviour. Arguments are memoized in the metaArgs table, and are only fetched from the
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-- pargs if pairs has already been run, as all the arguments will already have been copied over.
-- pargs if pairs has already been run, as all the arguments will already have been copied over.
--]]
--]]
 
metatable.__index = function (t, key)
metatable.__index = function (t, key)
local val = metaArgs[key]
local val = metaArgs[key]
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return nil
return nil
end
end
 
metatable.__newindex = function (t, key, val)
metatable.__newindex = function (t, key, val)
if options.readOnly then
if options.readOnly then
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end
end
end
end
 
metatable.__pairs = function ()
metatable.__pairs = function ()
if not metatable.donePairs then
if not metatable.donePairs then
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end
end
end
end
 
metatable.__ipairs = function ()
metatable.__ipairs = function ()
if not metatable.doneIpairs then
if not metatable.doneIpairs then
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end, nil, 0
end, nil, 0
end
end
 
return args
return args
end
end
 
return arguments
return arguments
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