Module:Arguments: Difference between revisions
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memoize nils using a separate nilArgs table; this fixes a bug where nil values were being iterated over with pairs() |
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-- #invoke. It is intended for use by other Lua modules, and should not be |
-- #invoke. It is intended for use by other Lua modules, and should not be |
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-- called from #invoke directly. |
-- called from #invoke directly. |
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local libraryUtil = require('libraryUtil') |
local libraryUtil = require('libraryUtil') |
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local checkType = libraryUtil.checkType |
local checkType = libraryUtil.checkType |
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local arguments = {} |
local arguments = {} |
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-- Generate four different tidyVal functions, so that we don't have to check the |
-- Generate four different tidyVal functions, so that we don't have to check the |
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-- options every time we call it. |
-- options every time we call it. |
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local function tidyValDefault(key, val) |
local function tidyValDefault(key, val) |
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if type(val) == 'string' then |
if type(val) == 'string' then |
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end |
end |
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end |
end |
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local function tidyValTrimOnly(key, val) |
local function tidyValTrimOnly(key, val) |
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if type(val) == 'string' then |
if type(val) == 'string' then |
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end |
end |
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end |
end |
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local function tidyValRemoveBlanksOnly(key, val) |
local function tidyValRemoveBlanksOnly(key, val) |
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if type(val) == 'string' then |
if type(val) == 'string' then |
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end |
end |
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end |
end |
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local function tidyValNoChange(key, val) |
local function tidyValNoChange(key, val) |
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return val |
return val |
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end |
end |
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function arguments.getArgs(frame, options) |
function arguments.getArgs(frame, options) |
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checkType('getArgs', 1, frame, 'table', true) |
checkType('getArgs', 1, frame, 'table', true) |
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frame = frame or {} |
frame = frame or {} |
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options = options or {} |
options = options or {} |
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--[[ |
--[[ |
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-- Get the arguments from the frame object if available. If the frame object |
-- Get the arguments from the frame object if available. If the frame object |
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luaArgs = frame |
luaArgs = frame |
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end |
end |
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-- Set the order of precedence of the argument tables. If the variables are |
-- Set the order of precedence of the argument tables. If the variables are |
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-- nil, nothing will be added to the table, which is how we avoid clashes |
-- nil, nothing will be added to the table, which is how we avoid clashes |
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argTables[#argTables + 1] = pargs |
argTables[#argTables + 1] = pargs |
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argTables[#argTables + 1] = luaArgs |
argTables[#argTables + 1] = luaArgs |
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--[[ |
--[[ |
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-- Generate the tidyVal function. If it has been specified by the user, we |
-- Generate the tidyVal function. If it has been specified by the user, we |
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end |
end |
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end |
end |
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--[[ |
--[[ |
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-- Set up the args, metaArgs and nilArgs tables. args will be the one |
-- Set up the args, metaArgs and nilArgs tables. args will be the one |
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local args, metaArgs, nilArgs, metatable = {}, {}, {}, {} |
local args, metaArgs, nilArgs, metatable = {}, {}, {}, {} |
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setmetatable(args, metatable) |
setmetatable(args, metatable) |
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local function mergeArgs(iterator, tables) |
local function mergeArgs(iterator, tables) |
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--[[ |
--[[ |
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end |
end |
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end |
end |
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--[[ |
--[[ |
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-- Define metatable behaviour. Arguments are memoized in the metaArgs table, |
-- Define metatable behaviour. Arguments are memoized in the metaArgs table, |
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-- the arguments will already have been copied over. |
-- the arguments will already have been copied over. |
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--]] |
--]] |
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metatable.__index = function (t, key) |
metatable.__index = function (t, key) |
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--[[ |
--[[ |
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return nil |
return nil |
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end |
end |
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metatable.__newindex = function (t, key, val) |
metatable.__newindex = function (t, key, val) |
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-- This function is called when a module tries to add a new value to the |
-- This function is called when a module tries to add a new value to the |
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end |
end |
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end |
end |
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metatable.__pairs = function () |
metatable.__pairs = function () |
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-- Called when pairs is run on the args table. |
-- Called when pairs is run on the args table. |
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return pairs(metaArgs) |
return pairs(metaArgs) |
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end |
end |
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metatable.__ipairs = function () |
metatable.__ipairs = function () |
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-- Called when ipairs is run on the args table. |
-- Called when ipairs is run on the args table. |
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return ipairs(metaArgs) |
return ipairs(metaArgs) |
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end |
end |
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return args |
return args |
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end |
end |
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return arguments |
return arguments |