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模組:IfUtil

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这是本页的一个历史版本，由A2569875​（留言 | 贡献）在2020年3月3日 (二) 13:01编辑。这可能和当前版本存在着巨大的差异。

local p={}
local lib_arg={}
--todo iferrornoTrim, ifexistnoTrim, ifeqnoTrim
function p.ifexprnoTrim(frame)--{{#invoke:IfUtil|ifexprnoTrim|5>3|Yes|No}}
	local args, working_frame
    if frame == mw.getCurrentFrame() then
        -- We're being called via #invoke. The args are passed through to the module
        -- from the template page, so use the args that were passed into the template.
        if lib_arg.getArgs == nil then lib_arg = require('Module:Arguments') end
        args = lib_arg.getArgs(frame, {
        	parentFirst=true,
        	trim = false,
			removeBlanks = false
        })
        working_frame = frame
    else
        -- We're being called from another module or from the debug console, so assume
        -- the args are passed in directly.
        args = frame
        working_frame = mw.getCurrentFrame()
        if type(args) ~= type({}) then args = {frame} end
    end
    local input_str = args['1'] or args[1] or '0'
    local output_if = args['2'] or args[2] or ''
    local check_max_arg = 2
    local ifexpr_table = {}
    for k,v in pairs(args) do
    	local check_num = tonumber(mw.text.trim(k))
    	if check_num and check_num > check_max_arg then
    		check_max_arg = check_num
    	end
    	ifexpr_table[k] = v
    end
    ifexpr_table['1'] = input_str
    ifexpr_table['2'] = output_if
    local tail = check_max_arg - check_max_arg % 2
    local output_else = (check_max_arg % 2 == 1) and (args[tostring(check_max_arg)] or args[check_max_arg]) or ''
    for i=1,tail,2 do
    	local expr = ifexpr_table[tostring(i)] or ifexpr_table[i] or '0'
    	local true_result = args[tostring(i+1)] or args[i+1] or ''
    	local flag,ifexpr = xpcall(function() return mw.ext.ParserFunctions.expr(expr)end,function()end)
    	--use original #ifexpr: to print original error
    	if flag~=true then return working_frame:preprocess("{{safesubst:#ifexpr:" .. expr .. '|' .. true_result .. '|' .. output_else .."}}") end
    	mw.log(expr .. ' => ' .. (ifexpr or'Error'))
    	if (tonumber(ifexpr or'0') or 0) ~= 0 then return true_result end
    end
    return output_else
end

function p.ifnoTrim(frame) 
	local args, working_frame
    if frame == mw.getCurrentFrame() then
        -- We're being called via #invoke. The args are passed through to the module
        -- from the template page, so use the args that were passed into the template.
        if lib_arg.getArgs == nil then lib_arg = require('Module:Arguments') end
        args = lib_arg.getArgs(frame, {
        	parentFirst=true,
        	trim = false,
			removeBlanks = false
        })
        working_frame = frame
    else
        -- We're being called from another module or from the debug console, so assume
        -- the args are passed in directly.
        args = frame
        working_frame = mw.getCurrentFrame()
        if type(args) ~= type({}) then args = {frame} end
    end
    local input_str = args['1'] or args[1] or ''
    local output_if = args['2'] or args[2] or ''
    local output_else = args['3'] or args[3] or ''
    if mw.text.trim(input_str) ~= '' then
    	return output_if
    end
    return output_else
end
function p.if2number(frame)
	local args, working_frame
    if frame == mw.getCurrentFrame() then
        -- We're being called via #invoke. The args are passed through to the module
        -- from the template page, so use the args that were passed into the template.
        if lib_arg.getArgs == nil then lib_arg = require('Module:Arguments') end
        args = lib_arg.getArgs(frame, {
        	parentFirst=true,
        	trim = false,
			removeBlanks = false
        })
        working_frame = frame
    else
        -- We're being called from another module or from the debug console, so assume
        -- the args are passed in directly.
        args = frame
        working_frame = mw.getCurrentFrame()
        if type(args) ~= type({}) then args = {frame} end
    end
    local input_str = args['1'] or args[1] or ''
    local output_hasTwo = args['2'] or args[2] or '1'
    local output_otherwise = args['3'] or args[3] or ''
    local check_split = args['4'] or args[4] or '~'
    local local_check = mw.text.trim(require('Module:TemplateParameters').containsNumber({input_str}))
    if local_check ~= '' then
    	local split_end, split2_first = mw.ustring.find(input_str,check_split)
    	local first_num_str, second_num_str = '', ''
    	if split_end then first_num_str = mw.ustring.sub(input_str,1,split_end-1) end
    	if split2_first then second_num_str = mw.ustring.sub(input_str,split2_first+1,-1) end
    	local first_num_check, second_num_check = mw.text.trim(require('Module:TemplateParameters').containsNumber({first_num_str})),
    		mw.text.trim(require('Module:TemplateParameters').containsNumber({second_num_str}))
    	if first_num_check ~= '' and second_num_check ~= '' then
    		first_num_check, second_num_check = require('Module:TemplateParameters').getNumberValue({first_num_str}),
    			require('Module:TemplateParameters').getNumberValue({second_num_str})
    		local first_num, second_num = tonumber(first_num_check), tonumber(second_num_check)
    		if first_num and second_num then
    			if first_num ~= second_num then
    				return output_hasTwo
				else return output_otherwise end
			else return output_otherwise end
    	else return output_otherwise end
    else return output_otherwise end
end
return p
检索自“https://zh.wikipedia.org/w/index.php?title=Module:IfUtil&oldid=58444384”