Compile lua online Language: Ada Assembly Bash C# C (gcc) C (clang) C (vc) C (gcc) C (clang) C (vc) Client Side Clojure Common Lisp D Elixir Erlang F# Fortran Go Haskell Java Javascript Kotlin Lua MySql Node.js Ocaml Octave Objective-C Oracle Pascal Perl Php PostgreSQL Prolog Python Python 3 R Rust Ruby Scala Scheme Sql Server Swift Tcl. Basically if the loop had a constant for the loop condition its sense was being reversed (so a false condition resulted in the loop being compiled as a simple block, and a true condition resulted in an infinite loop). (compile.go) Fixed and in non-boolean contexts. Also and and or may produce slightly better code now. The state pattern looks like a great solution but that means writing and maintaining a class for each state - too much work. Enter SMC - The State Machine Compiler. Now you put your state diagram in one file using an easy-to-understand language. SMC generates the state pattern classes for you. No more hand-maintained transition matrices.

Non Compilation Lua Cua

Course Code

luacomp

Duration

21 hours (usually 3 days including breaks)

Requirements

Familiarity with at least one other programming language. Programming experience. Optionally if you have familiarity with other scripting languages, that will make it easier to understand Lua.

Overview

Lua is an easy to use scripting language that is used as an embedded plugin/extension language in different products. For example, it is the embedded scripting language of network applications like nmap and wireshark, and can also be found as a scripting language in World of Warcraft, Orbiter and other games.

Lua can also be used as a standalone language. It is a lightweight, multi-paradigm programming language and therefore the course teaches various concepts that students will find useful in other areas of software engineering as well.

This course covers everything out there to know about Lua. We build up from the basic programming constructs, learn about advanced techniques and finally talk about embedding of Lua into other programming languages and embedding other programming languages into Lua. The course contains a lot of programming exercises, so that newcomers can gain proficiency with the language, starting from scratch.

Course Outline

Introduction to Lua

A bit of history
Lua's goals, features and non-goals
Resources of Lua documentation and tutorials
Installing the Lua interpreter
Setting up and using LuaRocks

Basic syntax and semantics

Identifiers
Comments, block comments
Global variables and enforcing of strictness
Local variables
Standalone programs, program arguments
Compilation units, chunks, expressions, semicolons

Data types and data structures

Basic types: nil, boolean, number, string
Object types: function, userdata, thread, table
References/objects vs. basic values
The importance of tables in Lua

Introduction to tables and their versatility

Tables as an associative array
Tables as numeric arrays, sequences

Basic control structures

The if then elseif else end
The while loop
The repeat loop
The simple for loop

Error handling

Return values vs exceptions
Converting a return value to an exception
Converting an exception to a return value
Error levels

Example programs

Polynomial evaluation
Breadth first search
Additional exercises

More about functions

Named arguments
Object-oriented calls
Closures
Currying
Tail calls
Multiple assignment and return
Varargs

Iterators and co-routines

The generic for loop
Stateless vs stateful iterators
Differences between iterators and co-routines

Metatables and metamethods

The set example
The __tostring metamethod
Arithmetic metamethods
The __index, __newindex metamethods
The __len metamethod

Modules and packages

Using modules
Creating modules
Organizing modules into packages

Advanced tables

Tables for queues and stacks
Tables describing graphs
Matrices as tables
Linked lists as tables
String buffers

Metatables through examples

Proxies
Readonly
Memoization
Dynamic programming with memoization
The Fibonacci example

Environments

Relationship between global variables and environments
Free variables
The _ENV table and the _G table

More about modules

Different approaches to creating modules
Modules that change the behavior
Module initialization and arguments
Using environments to implement safe modules

Advanced iterators and co-routines

Producer, consumer, filter
Wrapping co-routines to get iterators
Stateless iterator for linked lists

Contributing to the Ecosystem

Uploading packages to MoonRocks

Functional paradigm in Lua

The map function
The reduce / fold function

Object-oriented Programming

Different approaches to OOP
Different approaches to inheritance
Examples

A walkthrough of the Lua Standard Libraries

Compilation

Compilation
Eval
Relationship with the environment
Binary chunks

Non Compilation Lua Care

Garbage collection

Weak tables
Finalizers, the __gc meta-method

Lua bytecode and virtual machine

Generating bytecode from source code
Reading and analyzing bytecode
Quick tour of the source code of the Lua VM

C modules

Calling C from Lua
Search path and loading of C modules

Calling Lua from C

The Stack
Error handling
Continuations

Handling Lua values and types from C

Arrays
Strings
Userdata
Metatables
Object oriented calls
Light userdata

Memory management

Allocators
GC API

Threads in Lua

Co-routines vs threads
Real multi-threading and Lua states

This is a little essay that tries to answer the question:'So, how does LuaJIT really work?'.

I tried to avoid going into all the gory details, but at thesame time provide a deep enough explanation, to let you findyour way around LuaJIT's inner workings.

The learning curve is maybe a little bit steep for newbies andcompiler gurus will certainly fall asleep after two paragraphs.It's difficult to strike a balance here.

Acronym Soup

As the name says LuaJIT is a Just-In-Time (JIT) compiler.This means that functions are compiled on demand, i.e. when theyare run first. This ensures both a quick application startupand helps to avoid useless work, too. E.g. unused functionsare not compiled at all.

The other alternative is known as Ahead-Of-Time (AOT)compilation. Here everything is compiled before running any function.This is the classic way for many languages, such as C or C++.

In fact plain Lua allows you to pre-compile Lua source code intoLua bytecode and store it in a binary file that can be runlater on. This is used only in specific settings (e.g. memory limitedembedded systems), because the Lua bytecode compiler is really fast.The ability to run source files right away is part of what makesa dynamic language (aka scripting language) so powerful.

JIT compilation has a few other advantages for dynamic languagesthat AOT compilation can only provide with a massive amountof code analysis. More can be found in the literature.One particular advantage is explained later.

Quick, JIT — Run!

JIT compilation happens mostly invisible. You'll probably nevernotice that a compilation is going on. Part of the secret isthat everything happens in little pieces intermixed with runningthe application itself inbetween. The other part of the secretis that JIT compilation can be made pretty fast.

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