28 Jul Roberto Ierusalimschy & Luiz Henrique de Figueiredo & Waldemar Celes. 1. Lua Reference Manual. Abstract. Lua Reference Manual. Roberto Ierusalimschy,. Luiz Henrique de Figueiredo ,. Waldemar Celes. March 26, 1 – Introduction. Lua is an extension. Reference Manual. By Roberto Ierusalimschy, Luiz Henrique de Figueiredo , Waldemar Celes. Original version available at

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The reader function may return pieces of any size greater than zero. Pushes onto the stack the value t[n]where t is the value at the given valid index.

Pushes onto the stack a string identifying the current position of the control at level lvl in the call stack. This is the only function on string buffers that can and must be called with an extra element on the stack, which is the value to be added to the buffer. More specifically, if the stack has n elements, then index 1 represents the first element that is, the element that was pushed onto the stack first and index n represents the lua 5.1 reference manual element; index -1 also represents the last element that is, the element at the top and index lua 5.1 reference manual represents the first element.

Dumps a function as a binary chunk. If the object does not have a metatable, or if the metatable does not have this field, returns 0 and pushes nothing.

If the value at the given acceptable index is a full userdata, returns its block address. When called without formats, it uses a default format that reads the lua 5.1 reference manual next line see below.


All memory used by Lua is subject to automatic management: Therefore, there is no limit on the number of nested tail calls that a program can execute.

Because the error message is formatted for arguments e. The order operators work as follows. The writer returns an error code: Pushes the lua 5.1 reference manual pointed to by s with size len onto the stack. Therefore, if a hook calls back Lua to execute lux function or a chunk, this execution occurs without any calls to hooks.

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An optional message string is appended at the beginning of the traceback. It does not describe operator precedences. This function pops the value lua 5.1 reference manual the stack. The access is raw; that is, it does not invoke metamethods. The arguments must be strings or numbers.

Lua 5.1 Reference Manual

To allow the use of Lua as a script interpreter in Unix systems, the stand-alone interpreter skips the first line of a chunk if it starts with. Sets and gets the file position, measured from the beginning of the file, lua 5.1 reference manual the position given lua 5.1 reference manual offset plus a base specified by the string whenceas follows:.

In both cases pushes onto the stack the final value associated with tname in the registry. If this argument is absent or is nilreturns d. This function does not pop the Lua function from the stack.

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Lua Reference Manual – errata

Returns NULL and pushes nothing when the mannual is greater than the number of upvalues. To signal the end of the chunk, the reader must return NULL or set size to zero. When you click on a Lua 5.1 reference manual Product ad, you will be lua 5.1 reference manual to an Amazon detail page where you can learn more about the product and purchase it.

Removes the element at the given valid index, shifting down the elements above this index to fill the gap.

Otherwise, raises an error. The lua 5.1 reference manual time you resume a coroutine, it starts running its body. To call a function you must use the following protocol: This function only loads a chunk; it does not run it.

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Instead, it offers a special interface by means of functions and hooks. The access is raw; that is, it does not invoke metamethods.

The value of this expression is a list of all actual extra arguments, similar to a function with multiple results. If lua 5.1 reference manual is a table in package. Returns NULL and pushes nothing when the index is greater than the number of active local variables. Each function has an indicator like this: Also returns 0 51. any of the indices is non valid.