765 lines
32 KiB
Lua
765 lines
32 KiB
Lua
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---@diagnostic disable: undefined-global, lowercase-global
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arg =
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'Command-line arguments of Lua Standalone.'
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assert =
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'Raises an error if the value of its argument v is false (i.e., `nil` or `false`); otherwise, returns all its arguments. In case of error, `message` is the error object; when absent, it defaults to `"assertion failed!"`'
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cgopt.collect =
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'Performs a full garbage-collection cycle.'
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cgopt.stop =
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'Stops automatic execution.'
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cgopt.restart =
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'Restarts automatic execution.'
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cgopt.count =
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'Returns the total memory in Kbytes.'
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cgopt.step =
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'Performs a garbage-collection step.'
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cgopt.setpause =
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'Set `pause`.'
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cgopt.setstepmul =
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'Set `step multiplier`.'
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cgopt.incremental =
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'Change the collector mode to incremental.'
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cgopt.generational =
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'Change the collector mode to generational.'
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cgopt.isrunning =
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'Returns whether the collector is running.'
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collectgarbage =
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'This function is a generic interface to the garbage collector. It performs different functions according to its first argument, `opt`.'
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dofile =
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'Opens the named file and executes its content as a Lua chunk. When called without arguments, `dofile` executes the content of the standard input (`stdin`). Returns all values returned by the chunk. In case of errors, `dofile` propagates the error to its caller. (That is, `dofile` does not run in protected mode.)'
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error =
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[[
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Terminates the last protected function called and returns message as the error object.
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Usually, `error` adds some information about the error position at the beginning of the message, if the message is a string.
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]]
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_G =
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'A global variable (not a function) that holds the global environment (see §2.2). Lua itself does not use this variable; changing its value does not affect any environment, nor vice versa.'
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getfenv =
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'Returns the current environment in use by the function. `f` can be a Lua function or a number that specifies the function at that stack level.'
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getmetatable =
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'If object does not have a metatable, returns nil. Otherwise, if the object\'s metatable has a __metatable field, returns the associated value. Otherwise, returns the metatable of the given object.'
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ipairs =
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[[
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Returns three values (an iterator function, the table `t`, and `0`) so that the construction
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```lua
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for i,v in ipairs(t) do body end
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```
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will iterate over the key–value pairs `(1,t[1]), (2,t[2]), ...`, up to the first absent index.
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]]
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loadmode.b =
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'Only binary chunks.'
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loadmode.t =
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'Only text chunks.'
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loadmode.bt =
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'Both binary and text.'
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load['<5.1'] =
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'Loads a chunk using function `func` to get its pieces. Each call to `func` must return a string that concatenates with previous results.'
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load['>5.2'] =
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[[
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Loads a chunk.
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If `chunk` is a string, the chunk is this string. If `chunk` is a function, `load` calls it repeatedly to get the chunk pieces. Each call to `chunk` must return a string that concatenates with previous results. A return of an empty string, `nil`, or no value signals the end of the chunk.
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]]
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loadfile =
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'Loads a chunk from file `filename` or from the standard input, if no file name is given.'
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loadstring =
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'Loads a chunk from the given string.'
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module =
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'Creates a module.'
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next =
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[[
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Allows a program to traverse all fields of a table. Its first argument is a table and its second argument is an index in this table. A call to `next` returns the next index of the table and its associated value. When called with `nil` as its second argument, `next` returns an initial index and its associated value. When called with the last index, or with `nil` in an empty table, `next` returns `nil`. If the second argument is absent, then it is interpreted as `nil`. In particular, you can use `next(t)` to check whether a table is empty.
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The order in which the indices are enumerated is not specified, *even for numeric indices*. (To traverse a table in numerical order, use a numerical `for`.)
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The behavior of `next` is undefined if, during the traversal, you assign any value to a non-existent field in the table. You may however modify existing fields. In particular, you may set existing fields to nil.
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]]
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pairs =
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[[
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If `t` has a metamethod `__pairs`, calls it with t as argument and returns the first three results from the call.
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Otherwise, returns three values: the $next function, the table `t`, and `nil`, so that the construction
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```lua
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for k,v in pairs(t) do body end
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```
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will iterate over all key–value pairs of table `t`.
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See function $next for the caveats of modifying the table during its traversal.
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]]
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pcall =
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[[
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Calls the function `f` with the given arguments in *protected mode*. This means that any error inside `f` is not propagated; instead, `pcall` catches the error and returns a status code. Its first result is the status code (a boolean), which is true if the call succeeds without errors. In such case, `pcall` also returns all results from the call, after this first result. In case of any error, `pcall` returns `false` plus the error object.
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]]
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print =
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[[
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Receives any number of arguments and prints their values to `stdout`, converting each argument to a string following the same rules of $tostring.
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The function print is not intended for formatted output, but only as a quick way to show a value, for instance for debugging. For complete control over the output, use $string.format and $io.write.
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]]
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rawequal =
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'Checks whether v1 is equal to v2, without invoking the `__eq` metamethod.'
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rawget =
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'Gets the real value of `table[index]`, without invoking the `__index` metamethod.'
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rawlen =
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'Returns the length of the object `v`, without invoking the `__len` metamethod.'
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rawset =
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[[
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Sets the real value of `table[index]` to `value`, without using the `__newindex` metavalue. `table` must be a table, `index` any value different from `nil` and `NaN`, and `value` any Lua value.
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This function returns `table`.
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]]
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select =
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'If `index` is a number, returns all arguments after argument number `index`; a negative number indexes from the end (`-1` is the last argument). Otherwise, `index` must be the string `"#"`, and `select` returns the total number of extra arguments it received.'
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setfenv =
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'Sets the environment to be used by the given function.'
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setmetatable =
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[[
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Sets the metatable for the given table. If `metatable` is `nil`, removes the metatable of the given table. If the original metatable has a `__metatable` field, raises an error.
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This function returns `table`.
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To change the metatable of other types from Lua code, you must use the debug library (§6.10).
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]]
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tonumber =
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[[
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When called with no `base`, `tonumber` tries to convert its argument to a number. If the argument is already a number or a string convertible to a number, then `tonumber` returns this number; otherwise, it returns `fail`.
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The conversion of strings can result in integers or floats, according to the lexical conventions of Lua (see §3.1). The string may have leading and trailing spaces and a sign.
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]]
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tostring =
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[[
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Receives a value of any type and converts it to a string in a human-readable format.
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If the metatable of `v` has a `__tostring` field, then `tostring` calls the corresponding value with `v` as argument, and uses the result of the call as its result. Otherwise, if the metatable of `v` has a `__name` field with a string value, `tostring` may use that string in its final result.
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For complete control of how numbers are converted, use $string.format.
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]]
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type =
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[[
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Returns the type of its only argument, coded as a string. The possible results of this function are `"nil"` (a string, not the value `nil`), `"number"`, `"string"`, `"boolean"`, `"table"`, `"function"`, `"thread"`, and `"userdata"`.
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]]
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_VERSION =
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'A global variable (not a function) that holds a string containing the running Lua version.'
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warn =
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'Emits a warning with a message composed by the concatenation of all its arguments (which should be strings).'
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xpcall['=5.1'] =
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'Calls function `f` with the given arguments in protected mode with a new message handler.'
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xpcall['>5.2'] =
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'Calls function `f` with the given arguments in protected mode with a new message handler.'
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unpack =
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[[
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Returns the elements from the given `list`. This function is equivalent to
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```lua
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return list[i], list[i+1], ···, list[j]
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```
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]]
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bit32 =
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''
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bit32.arshift =
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[[
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Returns the number `x` shifted `disp` bits to the right. Negative displacements shift to the left.
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This shift operation is what is called arithmetic shift. Vacant bits on the left are filled with copies of the higher bit of `x`; vacant bits on the right are filled with zeros.
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]]
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bit32.band =
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'Returns the bitwise *and* of its operands.'
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bit32.bnot =
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[[
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Returns the bitwise negation of `x`.
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```lua
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assert(bit32.bnot(x) ==
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(-1 - x) % 2^32)
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```
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]]
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bit32.bor =
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'Returns the bitwise *or* of its operands.'
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bit32.btest =
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'Returns a boolean signaling whether the bitwise *and* of its operands is different from zero.'
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bit32.bxor =
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'Returns the bitwise *exclusive or* of its operands.'
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bit32.extract =
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'Returns the unsigned number formed by the bits `field` to `field + width - 1` from `n`.'
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bit32.replace =
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'Returns a copy of `n` with the bits `field` to `field + width - 1` replaced by the value `v` .'
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bit32.lrotate =
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'Returns the number `x` rotated `disp` bits to the left. Negative displacements rotate to the right.'
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bit32.lshift =
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[[
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Returns the number `x` shifted `disp` bits to the left. Negative displacements shift to the right. In any direction, vacant bits are filled with zeros.
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```lua
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assert(bit32.lshift(b, disp) ==
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(b * 2^disp) % 2^32)
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```
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]]
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bit32.rrotate =
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'Returns the number `x` rotated `disp` bits to the right. Negative displacements rotate to the left.'
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bit32.rshift =
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[[
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Returns the number `x` shifted `disp` bits to the right. Negative displacements shift to the left. In any direction, vacant bits are filled with zeros.
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```lua
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assert(bit32.rshift(b, disp) ==
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math.floor(b % 2^32 / 2^disp))
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```
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]]
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coroutine =
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''
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coroutine.create =
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'Creates a new coroutine, with body `f`. `f` must be a function. Returns this new coroutine, an object with type `"thread"`.'
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coroutine.isyieldable =
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'Returns true when the running coroutine can yield.'
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coroutine.isyieldable['>5.4']=
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'Returns true when the coroutine `co` can yield. The default for `co` is the running coroutine.'
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coroutine.close =
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'Closes coroutine `co` , closing all its pending to-be-closed variables and putting the coroutine in a dead state.'
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coroutine.resume =
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'Starts or continues the execution of coroutine `co`.'
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coroutine.running =
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'Returns the running coroutine plus a boolean, true when the running coroutine is the main one.'
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coroutine.status =
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'Returns the status of coroutine `co`.'
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coroutine.wrap =
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'Creates a new coroutine, with body `f`; `f` must be a function. Returns a function that resumes the coroutine each time it is called.'
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coroutine.yield =
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'Suspends the execution of the calling coroutine.'
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costatus.running =
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'Is running.'
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costatus.suspended =
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'Is suspended or not started.'
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costatus.normal =
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'Is active but not running.'
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costatus.dead =
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'Has finished or stopped with an error.'
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debug =
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''
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debug.debug =
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'Enters an interactive mode with the user, running each string that the user enters.'
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debug.getfenv =
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'Returns the environment of object `o` .'
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debug.gethook =
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'Returns the current hook settings of the thread.'
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debug.getinfo =
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'Returns a table with information about a function.'
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debug.getlocal['<5.1'] =
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'Returns the name and the value of the local variable with index `local` of the function at level `level` of the stack.'
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debug.getlocal['>5.2'] =
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'Returns the name and the value of the local variable with index `local` of the function at level `f` of the stack.'
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debug.getmetatable =
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'Returns the metatable of the given value.'
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debug.getregistry =
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'Returns the registry table.'
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debug.getupvalue =
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'Returns the name and the value of the upvalue with index `up` of the function.'
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debug.getuservalue['<5.3'] =
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'Returns the Lua value associated to u.'
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debug.getuservalue['>5.4'] =
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[[
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Returns the `n`-th user value associated
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to the userdata `u` plus a boolean,
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`false` if the userdata does not have that value.
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]]
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debug.setcstacklimit =
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[[
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### **Deprecated in `Lua 5.4.2`**
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Sets a new limit for the C stack. This limit controls how deeply nested calls can go in Lua, with the intent of avoiding a stack overflow.
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In case of success, this function returns the old limit. In case of error, it returns `false`.
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]]
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debug.setfenv =
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'Sets the environment of the given `object` to the given `table` .'
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debug.sethook =
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'Sets the given function as a hook.'
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debug.setlocal =
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'Assigns the `value` to the local variable with index `local` of the function at `level` of the stack.'
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debug.setmetatable =
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'Sets the metatable for the given value to the given table (which can be `nil`).'
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debug.setupvalue =
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'Assigns the `value` to the upvalue with index `up` of the function.'
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debug.setuservalue['<5.3'] =
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'Sets the given value as the Lua value associated to the given udata.'
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debug.setuservalue['>5.4'] =
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[[
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Sets the given `value` as
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the `n`-th user value associated to the given `udata`.
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`udata` must be a full userdata.
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]]
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|
|
debug.traceback =
|
|||
|
|
'Returns a string with a traceback of the call stack. The optional message string is appended at the beginning of the traceback.'
|
|||
|
|
debug.upvalueid =
|
|||
|
|
'Returns a unique identifier (as a light userdata) for the upvalue numbered `n` from the given function.'
|
|||
|
|
debug.upvaluejoin =
|
|||
|
|
'Make the `n1`-th upvalue of the Lua closure `f1` refer to the `n2`-th upvalue of the Lua closure `f2`.'
|
|||
|
|
|
|||
|
|
infowhat.n =
|
|||
|
|
'`name` and `namewhat`'
|
|||
|
|
infowhat.S =
|
|||
|
|
'`source`, `short_src`, `linedefined`, `lastlinedefined`, and `what`'
|
|||
|
|
infowhat.l =
|
|||
|
|
'`currentline`'
|
|||
|
|
infowhat.t =
|
|||
|
|
'`istailcall`'
|
|||
|
|
infowhat.u['<5.1'] =
|
|||
|
|
'`nups`'
|
|||
|
|
infowhat.u['>5.2'] =
|
|||
|
|
'`nups`, `nparams`, and `isvararg`'
|
|||
|
|
infowhat.f =
|
|||
|
|
'`func`'
|
|||
|
|
infowhat.r =
|
|||
|
|
'`ftransfer` and `ntransfer`'
|
|||
|
|
infowhat.L =
|
|||
|
|
'`activelines`'
|
|||
|
|
|
|||
|
|
hookmask.c =
|
|||
|
|
'Calls hook when Lua calls a function.'
|
|||
|
|
hookmask.r =
|
|||
|
|
'Calls hook when Lua returns from a function.'
|
|||
|
|
hookmask.l =
|
|||
|
|
'Calls hook when Lua enters a new line of code.'
|
|||
|
|
|
|||
|
|
file =
|
|||
|
|
''
|
|||
|
|
file[':close'] =
|
|||
|
|
'Close `file`.'
|
|||
|
|
file[':flush'] =
|
|||
|
|
'Saves any written data to `file`.'
|
|||
|
|
file[':lines'] =
|
|||
|
|
[[
|
|||
|
|
------
|
|||
|
|
```lua
|
|||
|
|
for c in file:lines(...) do
|
|||
|
|
body
|
|||
|
|
end
|
|||
|
|
```
|
|||
|
|
]]
|
|||
|
|
file[':read'] =
|
|||
|
|
'Reads the `file`, according to the given formats, which specify what to read.'
|
|||
|
|
file[':seek'] =
|
|||
|
|
'Sets and gets the file position, measured from the beginning of the file.'
|
|||
|
|
file[':setvbuf'] =
|
|||
|
|
'Sets the buffering mode for an output file.'
|
|||
|
|
file[':write'] =
|
|||
|
|
'Writes the value of each of its arguments to `file`.'
|
|||
|
|
|
|||
|
|
readmode.n =
|
|||
|
|
'Reads a numeral and returns it as number.'
|
|||
|
|
readmode.a =
|
|||
|
|
'Reads the whole file.'
|
|||
|
|
readmode.l =
|
|||
|
|
'Reads the next line skipping the end of line.'
|
|||
|
|
readmode.L =
|
|||
|
|
'Reads the next line keeping the end of line.'
|
|||
|
|
|
|||
|
|
seekwhence.set =
|
|||
|
|
'Base is beginning of the file.'
|
|||
|
|
seekwhence.cur =
|
|||
|
|
'Base is current position.'
|
|||
|
|
seekwhence['.end'] =
|
|||
|
|
'Base is end of file.'
|
|||
|
|
|
|||
|
|
vbuf.no =
|
|||
|
|
'Output operation appears immediately.'
|
|||
|
|
vbuf.full =
|
|||
|
|
'Performed only when the buffer is full.'
|
|||
|
|
vbuf.line =
|
|||
|
|
'Buffered until a newline is output.'
|
|||
|
|
|
|||
|
|
io =
|
|||
|
|
''
|
|||
|
|
io.stdin =
|
|||
|
|
'standard input.'
|
|||
|
|
io.stdout =
|
|||
|
|
'standard output.'
|
|||
|
|
io.stderr =
|
|||
|
|
'standard error.'
|
|||
|
|
io.close =
|
|||
|
|
'Close `file` or default output file.'
|
|||
|
|
io.flush =
|
|||
|
|
'Saves any written data to default output file.'
|
|||
|
|
io.input =
|
|||
|
|
'Sets `file` as the default input file.'
|
|||
|
|
io.lines =
|
|||
|
|
[[
|
|||
|
|
------
|
|||
|
|
```lua
|
|||
|
|
for c in io.lines(filename, ...) do
|
|||
|
|
body
|
|||
|
|
end
|
|||
|
|
```
|
|||
|
|
]]
|
|||
|
|
io.open =
|
|||
|
|
'Opens a file, in the mode specified in the string `mode`.'
|
|||
|
|
io.output =
|
|||
|
|
'Sets `file` as the default output file.'
|
|||
|
|
io.popen =
|
|||
|
|
'Starts program prog in a separated process.'
|
|||
|
|
io.read =
|
|||
|
|
'Reads the `file`, according to the given formats, which specify what to read.'
|
|||
|
|
io.tmpfile =
|
|||
|
|
'In case of success, returns a handle for a temporary file.'
|
|||
|
|
io.type =
|
|||
|
|
'Checks whether `obj` is a valid file handle.'
|
|||
|
|
io.write =
|
|||
|
|
'Writes the value of each of its arguments to default output file.'
|
|||
|
|
|
|||
|
|
openmode.r =
|
|||
|
|
'Read mode.'
|
|||
|
|
openmode.w =
|
|||
|
|
'Write mode.'
|
|||
|
|
openmode.a =
|
|||
|
|
'Append mode.'
|
|||
|
|
openmode['.r+'] =
|
|||
|
|
'Update mode, all previous data is preserved.'
|
|||
|
|
openmode['.w+'] =
|
|||
|
|
'Update mode, all previous data is erased.'
|
|||
|
|
openmode['.a+'] =
|
|||
|
|
'Append update mode, previous data is preserved, writing is only allowed at the end of file.'
|
|||
|
|
openmode.rb =
|
|||
|
|
'Read mode. (in binary mode.)'
|
|||
|
|
openmode.wb =
|
|||
|
|
'Write mode. (in binary mode.)'
|
|||
|
|
openmode.ab =
|
|||
|
|
'Append mode. (in binary mode.)'
|
|||
|
|
openmode['.r+b'] =
|
|||
|
|
'Update mode, all previous data is preserved. (in binary mode.)'
|
|||
|
|
openmode['.w+b'] =
|
|||
|
|
'Update mode, all previous data is erased. (in binary mode.)'
|
|||
|
|
openmode['.a+b'] =
|
|||
|
|
'Append update mode, previous data is preserved, writing is only allowed at the end of file. (in binary mode.)'
|
|||
|
|
|
|||
|
|
popenmode.r =
|
|||
|
|
'Read data from this program by `file`.'
|
|||
|
|
popenmode.w =
|
|||
|
|
'Write data to this program by `file`.'
|
|||
|
|
|
|||
|
|
filetype.file =
|
|||
|
|
'Is an open file handle.'
|
|||
|
|
filetype['.closed file'] =
|
|||
|
|
'Is a closed file handle.'
|
|||
|
|
filetype['.nil'] =
|
|||
|
|
'Is not a file handle.'
|
|||
|
|
|
|||
|
|
math =
|
|||
|
|
''
|
|||
|
|
math.abs =
|
|||
|
|
'Returns the absolute value of `x`.'
|
|||
|
|
math.acos =
|
|||
|
|
'Returns the arc cosine of `x` (in radians).'
|
|||
|
|
math.asin =
|
|||
|
|
'Returns the arc sine of `x` (in radians).'
|
|||
|
|
math.atan['<5.2'] =
|
|||
|
|
'Returns the arc tangent of `x` (in radians).'
|
|||
|
|
math.atan['>5.3'] =
|
|||
|
|
'Returns the arc tangent of `y/x` (in radians).'
|
|||
|
|
math.atan2 =
|
|||
|
|
'Returns the arc tangent of `y/x` (in radians).'
|
|||
|
|
math.ceil =
|
|||
|
|
'Returns the smallest integral value larger than or equal to `x`.'
|
|||
|
|
math.cos =
|
|||
|
|
'Returns the cosine of `x` (assumed to be in radians).'
|
|||
|
|
math.cosh =
|
|||
|
|
'Returns the hyperbolic cosine of `x` (assumed to be in radians).'
|
|||
|
|
math.deg =
|
|||
|
|
'Converts the angle `x` from radians to degrees.'
|
|||
|
|
math.exp =
|
|||
|
|
'Returns the value `e^x` (where `e` is the base of natural logarithms).'
|
|||
|
|
math.floor =
|
|||
|
|
'Returns the largest integral value smaller than or equal to `x`.'
|
|||
|
|
math.fmod =
|
|||
|
|
'Returns the remainder of the division of `x` by `y` that rounds the quotient towards zero.'
|
|||
|
|
math.frexp =
|
|||
|
|
'Decompose `x` into tails and exponents. Returns `m` and `e` such that `x = m * (2 ^ e)`, `e` is an integer and the absolute value of `m` is in the range [0.5, 1) (or zero when `x` is zero).'
|
|||
|
|
math.huge =
|
|||
|
|
'A value larger than any other numeric value.'
|
|||
|
|
math.ldexp =
|
|||
|
|
'Returns `m * (2 ^ e)` .'
|
|||
|
|
math.log['<5.1'] =
|
|||
|
|
'Returns the natural logarithm of `x` .'
|
|||
|
|
math.log['>5.2'] =
|
|||
|
|
'Returns the logarithm of `x` in the given base.'
|
|||
|
|
math.log10 =
|
|||
|
|
'Returns the base-10 logarithm of x.'
|
|||
|
|
math.max =
|
|||
|
|
'Returns the argument with the maximum value, according to the Lua operator `<`.'
|
|||
|
|
math.maxinteger =
|
|||
|
|
'An integer with the maximum value for an integer.'
|
|||
|
|
math.min =
|
|||
|
|
'Returns the argument with the minimum value, according to the Lua operator `<`.'
|
|||
|
|
math.mininteger =
|
|||
|
|
'An integer with the minimum value for an integer.'
|
|||
|
|
math.modf =
|
|||
|
|
'Returns the integral part of `x` and the fractional part of `x`.'
|
|||
|
|
math.pi =
|
|||
|
|
'The value of *π*.'
|
|||
|
|
math.pow =
|
|||
|
|
'Returns `x ^ y` .'
|
|||
|
|
math.rad =
|
|||
|
|
'Converts the angle `x` from degrees to radians.'
|
|||
|
|
math.random =
|
|||
|
|
[[
|
|||
|
|
* `math.random()`: Returns a float in the range [0,1).
|
|||
|
|
* `math.random(n)`: Returns a integer in the range [1, n].
|
|||
|
|
* `math.random(m, n)`: Returns a integer in the range [m, n].
|
|||
|
|
]]
|
|||
|
|
math.randomseed['<5.3'] =
|
|||
|
|
'Sets `x` as the "seed" for the pseudo-random generator.'
|
|||
|
|
math.randomseed['>5.4'] =
|
|||
|
|
[[
|
|||
|
|
* `math.randomseed(x, y)`: Concatenate `x` and `y` into a 128-bit `seed` to reinitialize the pseudo-random generator.
|
|||
|
|
* `math.randomseed(x)`: Equate to `math.randomseed(x, 0)` .
|
|||
|
|
* `math.randomseed()`: Generates a seed with a weak attempt for randomness.
|
|||
|
|
]]
|
|||
|
|
math.sin =
|
|||
|
|
'Returns the sine of `x` (assumed to be in radians).'
|
|||
|
|
math.sinh =
|
|||
|
|
'Returns the hyperbolic sine of `x` (assumed to be in radians).'
|
|||
|
|
math.sqrt =
|
|||
|
|
'Returns the square root of `x`.'
|
|||
|
|
math.tan =
|
|||
|
|
'Returns the tangent of `x` (assumed to be in radians).'
|
|||
|
|
math.tanh =
|
|||
|
|
'Returns the hyperbolic tangent of `x` (assumed to be in radians).'
|
|||
|
|
math.tointeger =
|
|||
|
|
'If the value `x` is convertible to an integer, returns that integer.'
|
|||
|
|
math.type =
|
|||
|
|
'Returns `"integer"` if `x` is an integer, `"float"` if it is a float, or `nil` if `x` is not a number.'
|
|||
|
|
math.ult =
|
|||
|
|
'Returns `true` if and only if `m` is below `n` when they are compared as unsigned integers.'
|
|||
|
|
|
|||
|
|
os =
|
|||
|
|
''
|
|||
|
|
os.clock =
|
|||
|
|
'Returns an approximation of the amount in seconds of CPU time used by the program.'
|
|||
|
|
os.date =
|
|||
|
|
'Returns a string or a table containing date and time, formatted according to the given string `format`.'
|
|||
|
|
os.difftime =
|
|||
|
|
'Returns the difference, in seconds, from time `t1` to time `t2`.'
|
|||
|
|
os.execute =
|
|||
|
|
'Passes `command` to be executed by an operating system shell.'
|
|||
|
|
os.exit['<5.1'] =
|
|||
|
|
'Calls the C function `exit` to terminate the host program.'
|
|||
|
|
os.exit['>5.2'] =
|
|||
|
|
'Calls the ISO C function `exit` to terminate the host program.'
|
|||
|
|
os.getenv =
|
|||
|
|
'Returns the value of the process environment variable `varname`.'
|
|||
|
|
os.remove =
|
|||
|
|
'Deletes the file with the given name.'
|
|||
|
|
os.rename =
|
|||
|
|
'Renames the file or directory named `oldname` to `newname`.'
|
|||
|
|
os.setlocale =
|
|||
|
|
'Sets the current locale of the program.'
|
|||
|
|
os.time =
|
|||
|
|
'Returns the current time when called without arguments, or a time representing the local date and time specified by the given table.'
|
|||
|
|
os.tmpname =
|
|||
|
|
'Returns a string with a file name that can be used for a temporary file.'
|
|||
|
|
|
|||
|
|
osdate.year =
|
|||
|
|
'four digits'
|
|||
|
|
osdate.month =
|
|||
|
|
'1-12'
|
|||
|
|
osdate.day =
|
|||
|
|
'1-31'
|
|||
|
|
osdate.hour =
|
|||
|
|
'0-23'
|
|||
|
|
osdate.min =
|
|||
|
|
'0-59'
|
|||
|
|
osdate.sec =
|
|||
|
|
'0-61'
|
|||
|
|
osdate.wday =
|
|||
|
|
'weekday, 1–7, Sunday is 1'
|
|||
|
|
osdate.yday =
|
|||
|
|
'day of the year, 1–366'
|
|||
|
|
osdate.isdst =
|
|||
|
|
'daylight saving flag, a boolean'
|
|||
|
|
|
|||
|
|
package =
|
|||
|
|
''
|
|||
|
|
|
|||
|
|
require['<5.3'] =
|
|||
|
|
'Loads the given module, returns any value returned by the given module(`true` when `nil`).'
|
|||
|
|
require['>5.4'] =
|
|||
|
|
'Loads the given module, returns any value returned by the searcher(`true` when `nil`). Besides that value, also returns as a second result the loader data returned by the searcher, which indicates how `require` found the module. (For instance, if the module came from a file, this loader data is the file path.)'
|
|||
|
|
|
|||
|
|
package.config =
|
|||
|
|
'A string describing some compile-time configurations for packages.'
|
|||
|
|
package.cpath =
|
|||
|
|
'The path used by `require` to search for a C loader.'
|
|||
|
|
package.loaded =
|
|||
|
|
'A table used by `require` to control which modules are already loaded.'
|
|||
|
|
package.loaders =
|
|||
|
|
'A table used by `require` to control how to load modules.'
|
|||
|
|
package.loadlib =
|
|||
|
|
'Dynamically links the host program with the C library `libname`.'
|
|||
|
|
package.path =
|
|||
|
|
'The path used by `require` to search for a Lua loader.'
|
|||
|
|
package.preload =
|
|||
|
|
'A table to store loaders for specific modules.'
|
|||
|
|
package.searchers =
|
|||
|
|
'A table used by `require` to control how to load modules.'
|
|||
|
|
package.searchpath =
|
|||
|
|
'Searches for the given `name` in the given `path`.'
|
|||
|
|
package.seeall =
|
|||
|
|
'Sets a metatable for `module` with its `__index` field referring to the global environment, so that this module inherits values from the global environment. To be used as an option to function `module` .'
|
|||
|
|
|
|||
|
|
string =
|
|||
|
|
''
|
|||
|
|
string.byte =
|
|||
|
|
'Returns the internal numeric codes of the characters `s[i], s[i+1], ..., s[j]`.'
|
|||
|
|
string.char =
|
|||
|
|
'Returns a string with length equal to the number of arguments, in which each character has the internal numeric code equal to its corresponding argument.'
|
|||
|
|
string.dump =
|
|||
|
|
'Returns a string containing a binary representation (a *binary chunk*) of the given function.'
|
|||
|
|
string.find =
|
|||
|
|
'Looks for the first match of `pattern` (see §6.4.1) in the string.'
|
|||
|
|
string.format =
|
|||
|
|
'Returns a formatted version of its variable number of arguments following the description given in its first argument.'
|
|||
|
|
string.gmatch =
|
|||
|
|
[[
|
|||
|
|
Returns an iterator function that, each time it is called, returns the next captures from `pattern` (see §6.4.1) over the string s.
|
|||
|
|
|
|||
|
|
As an example, the following loop will iterate over all the words from string s, printing one per line:
|
|||
|
|
```lua
|
|||
|
|
s =
|
|||
|
|
"hello world from Lua"
|
|||
|
|
for w in string.gmatch(s, "%a+") do
|
|||
|
|
print(w)
|
|||
|
|
end
|
|||
|
|
```
|
|||
|
|
]]
|
|||
|
|
string.gsub =
|
|||
|
|
'Returns a copy of s in which all (or the first `n`, if given) occurrences of the `pattern` (see §6.4.1) have been replaced by a replacement string specified by `repl`.'
|
|||
|
|
string.len =
|
|||
|
|
'Returns its length.'
|
|||
|
|
string.lower =
|
|||
|
|
'Returns a copy of this string with all uppercase letters changed to lowercase.'
|
|||
|
|
string.match =
|
|||
|
|
'Looks for the first match of `pattern` (see §6.4.1) in the string.'
|
|||
|
|
string.pack =
|
|||
|
|
'Returns a binary string containing the values `v1`, `v2`, etc. packed (that is, serialized in binary form) according to the format string `fmt` (see §6.4.2) .'
|
|||
|
|
string.packsize =
|
|||
|
|
'Returns the size of a string resulting from `string.pack` with the given format string `fmt` (see §6.4.2) .'
|
|||
|
|
string.rep['>5.2'] =
|
|||
|
|
'Returns a string that is the concatenation of `n` copies of the string `s` separated by the string `sep`.'
|
|||
|
|
string.rep['<5.1'] =
|
|||
|
|
'Returns a string that is the concatenation of `n` copies of the string `s` .'
|
|||
|
|
string.reverse =
|
|||
|
|
'Returns a string that is the string `s` reversed.'
|
|||
|
|
string.sub =
|
|||
|
|
'Returns the substring of the string that starts at `i` and continues until `j`.'
|
|||
|
|
string.unpack =
|
|||
|
|
'Returns the values packed in string according to the format string `fmt` (see §6.4.2) .'
|
|||
|
|
string.upper =
|
|||
|
|
'Returns a copy of this string with all lowercase letters changed to uppercase.'
|
|||
|
|
|
|||
|
|
table =
|
|||
|
|
''
|
|||
|
|
table.concat =
|
|||
|
|
'Given a list where all elements are strings or numbers, returns the string `list[i]..sep..list[i+1] ··· sep..list[j]`.'
|
|||
|
|
table.insert =
|
|||
|
|
'Inserts element `value` at position `pos` in `list`.'
|
|||
|
|
table.maxn =
|
|||
|
|
'Returns the largest positive numerical index of the given table, or zero if the table has no positive numerical indices.'
|
|||
|
|
table.move =
|
|||
|
|
[[
|
|||
|
|
Moves elements from table `a1` to table `a2`.
|
|||
|
|
```lua
|
|||
|
|
a2[t],··· =
|
|||
|
|
a1[f],···,a1[e]
|
|||
|
|
return a2
|
|||
|
|
```
|
|||
|
|
]]
|
|||
|
|
table.pack =
|
|||
|
|
'Returns a new table with all arguments stored into keys `1`, `2`, etc. and with a field `"n"` with the total number of arguments.'
|
|||
|
|
table.remove =
|
|||
|
|
'Removes from `list` the element at position `pos`, returning the value of the removed element.'
|
|||
|
|
table.sort =
|
|||
|
|
'Sorts list elements in a given order, *in-place*, from `list[1]` to `list[#list]`.'
|
|||
|
|
table.unpack =
|
|||
|
|
[[
|
|||
|
|
Returns the elements from the given list. This function is equivalent to
|
|||
|
|
```lua
|
|||
|
|
return list[i], list[i+1], ···, list[j]
|
|||
|
|
```
|
|||
|
|
By default, `i` is `1` and `j` is `#list`.
|
|||
|
|
]]
|
|||
|
|
table.foreach =
|
|||
|
|
'Executes the given f over all elements of table. For each element, f is called with the index and respective value as arguments. If f returns a non-nil value, then the loop is broken, and this value is returned as the final value of foreach.'
|
|||
|
|
table.foreachi =
|
|||
|
|
'Executes the given f over the numerical indices of table. For each index, f is called with the index and respective value as arguments. Indices are visited in sequential order, from 1 to n, where n is the size of the table. If f returns a non-nil value, then the loop is broken and this value is returned as the result of foreachi.'
|
|||
|
|
table.getn =
|
|||
|
|
'Returns the number of elements in the table. This function is equivalent to `#list`.'
|
|||
|
|
table.new =
|
|||
|
|
[[This creates a pre-sized table, just like the C API equivalent `lua_createtable()`. This is useful for big tables if the final table size is known and automatic table resizing is too expensive. `narray` parameter specifies the number of array-like items, and `nhash` parameter specifies the number of hash-like items. The function needs to be required before use.
|
|||
|
|
```lua
|
|||
|
|
require("table.new")
|
|||
|
|
```
|
|||
|
|
]]
|
|||
|
|
table.clear =
|
|||
|
|
[[This clears all keys and values from a table, but preserves the allocated array/hash sizes. This is useful when a table, which is linked from multiple places, needs to be cleared and/or when recycling a table for use by the same context. This avoids managing backlinks, saves an allocation and the overhead of incremental array/hash part growth. The function needs to be required before use.
|
|||
|
|
```lua
|
|||
|
|
require("table.clear").
|
|||
|
|
```
|
|||
|
|
Please note this function is meant for very specific situations. In most cases it's better to replace the (usually single) link with a new table and let the GC do its work.
|
|||
|
|
]]
|
|||
|
|
|
|||
|
|
utf8 =
|
|||
|
|
''
|
|||
|
|
utf8.char =
|
|||
|
|
'Receives zero or more integers, converts each one to its corresponding UTF-8 byte sequence and returns a string with the concatenation of all these sequences.'
|
|||
|
|
utf8.charpattern =
|
|||
|
|
'The pattern which matches exactly one UTF-8 byte sequence, assuming that the subject is a valid UTF-8 string.'
|
|||
|
|
utf8.codes =
|
|||
|
|
[[
|
|||
|
|
Returns values so that the construction
|
|||
|
|
```lua
|
|||
|
|
for p, c in utf8.codes(s) do
|
|||
|
|
body
|
|||
|
|
end
|
|||
|
|
```
|
|||
|
|
will iterate over all UTF-8 characters in string s, with p being the position (in bytes) and c the code point of each character. It raises an error if it meets any invalid byte sequence.
|
|||
|
|
]]
|
|||
|
|
utf8.codepoint =
|
|||
|
|
'Returns the codepoints (as integers) from all characters in `s` that start between byte position `i` and `j` (both included).'
|
|||
|
|
utf8.len =
|
|||
|
|
'Returns the number of UTF-8 characters in string `s` that start between positions `i` and `j` (both inclusive).'
|
|||
|
|
utf8.offset =
|
|||
|
|
'Returns the position (in bytes) where the encoding of the `n`-th character of `s` (counting from position `i`) starts.'
|