Friday, January 20, 2012

Self-hosting

computer program language,Self-hosting,self hosting website,self hosting web api,wcf self hosting sample,wordpress self hosting
The term self-hosting was coined to refer to the use of a computer program as part of the toolchain or operating system that produces new versions of that same program—for example, a compiler that can compile its own source code. Self-hosting software is commonplace onpersonal computers and larger systems. Other programs that are typically self-hosting include kernels, assemblers, shells and revision control software.

If a system is so new that no software has been written for it, then software is developed on another self-hosting system and placed on astorage device that the new system can read. Development continues this way until the new system can reliably host its own development. Development of the Linux operating system, for example, was initially hosted on a Minix system. Writing new software development tools "from the metal" (that is, without using another host system) is rare and in many cases impractical.

History
The first self-hosting compiler (excluding assemblers) was written for Lisp by Hart and Levin at MIT in 1962. They wrote a Lisp compiler in Lisp, testing it inside an existing Lisp interpreter. Once they had improved the compiler to the point where it could compile its own source code, it was self-hosting.[1]
The compiler as it exists on the standard compiler tape is a machine language program that was obtained by having the S-expressiondefinition of the compiler work on itself through the interpreter. (AI Memo 39)[1]
This technique is only possible when an interpreter already exists for the very same language that is to be compiled. It borrows directly from the notion of running a program on itself as input, which is also used in various proofs in theoretical computer science, such as the proof that the halting problem is undecidable.

Examples
Several programming languages are self-hosting, in the sense that a compiler for the language can be written in that same language. Self-hosting is an attribute of a particular language implementation and not of the programming language in general. The first compiler for a new programming language can be written in another language (in rare cases, machine language) or can be produced using bootstrapping. Programming languages which have been self-hosted include Ada, BASIC, C, CoffeeScript, F#, FASM, Forth, Haskell, Java, Lisp, Modula-2,OCaml, Oberon, Pascal, Python, Scala, Smalltalk, and Vala.[citation needed]

source : http://en.wikipedia.org/wiki/Self-hosting

Share on Facebook
Share on Twitter
Share on Google+
Tags :

Related : Self-hosting

  • Internet The Internet is a global system of interconnected computer networks that use the standardInternet protocol suite (TCP/IP) to serve billions of users worldwide. It is a ...
  • Design Pattern A design pattern in architecture and computer science is a formal way of documenting a solution to a design problem in a particular field of expertise. The idea was ...
  • How Adsense Work? Google AdSense is a program run by Google Inc. that allows publishers in the Google Network of content sites to serve automatic text, image, video, and rich media ad ...
  • Client Music Synthesis The Client Music Synthesis (CMS) is a technology conceived to transfer very large music files via internet (or via any communication means having similar data tra ...
  • Upside Down Social Networking by LaTease Rikard There are many ways to make money from the internet. You can get paid to tweet, promote information, learn PPC & CPA marketing or even learn ...

0 komentar:

Post a Comment