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---@meta
---#DES 'file'
---@class file*
local file = {}
---@alias readmode number
---#if VERSION >= 5.3 then
---| '"n"' # ---#DESTAIL 'readmode.n'
---| '"a"' # ---#DESTAIL 'readmode.a'
---|>'"l"' # ---#DESTAIL 'readmode.l'
---| '"L"' # ---#DESTAIL 'readmode.L'
---#else
---| '"*n"' # ---#DESTAIL 'readmode.n'
---| '"*a"' # ---#DESTAIL 'readmode.a'
---|>'"*l"' # ---#DESTAIL 'readmode.l'
---#if JIT then
---| '"*L"' # ---#DESTAIL 'readmode.L'
---#end
---#end
---@alias exitcode | '"exit"'|'"signal"'
---#DES 'file:close'
---@return boolean? suc
---@return exitcode? exitcode
---@return integer? code
function file:close() end
---#DES 'file:flush'
function file:flush() end
---#DES 'file:lines'
---@vararg readmode
---@return fun():string|number
function file:lines(...) end
---#DES 'file:read'
---@vararg readmode
---@return string|number
function file:read(...) end
---@alias seekwhence
---| '"set"' # ---#DESTAIL 'seekwhence.set'
---|>'"cur"' # ---#DESTAIL 'seekwhence.cur'
---| '"end"' # ---#DESTAIL 'seekwhence.end'
---#DES 'file:seek'
---@param whence? seekwhence
---@param offset? integer
---@return integer offset
---@return string? errmsg
function file:seek(whence, offset) end
---@alias vbuf
---| '"no"' # ---#DESTAIL 'vbuf.no'
---| '"full"' # ---#DESTAIL 'vbuf.full'
---| '"line"' # ---#DESTAIL 'vbuf.line'
---#DES 'file:setvbuf'
---@param mode vbuf
---@param size integer
function file:setvbuf(mode, size) end
---#DES 'file:write'
---@vararg string|number
---@return file?
---@return string? errmsg
function file:write(...) end
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