Meta-Compilation
Encyclopedia
Metacompilation is a computation
Computation
Computation is defined as any type of calculation. Also defined as use of computer technology in Information processing.Computation is a process following a well-defined model understood and expressed in an algorithm, protocol, network topology, etc...

 which involves metasystem transitions (MST) from a computing machine M to a metamachine M' which controls, analyzes and imitates the work of M. Semantics-based program transformation, such as partial evaluation and supercompilation (SCP), is metacomputation. Metasystem transitions may be repeated, as when a program transformer gets transformed itself. In this manner MST hierarchies of any height can be formed. The Fox paper reviews one strain of research which was started in Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

 by Valentin Turchin
Valentin Turchin
Valentin Fyodorovich Turchin was a Soviet and American cybernetician and computer scientist. He developed the Refal programming language, the theory of metasystem transitions and the notion of supercompilation...

's REFAL
Refal
Refal "is a functional programming language oriented toward symbol manipulation", including "string processing, translation, [and] artificial intelligence". It is one of the oldest members of this family, first conceived in 1966 as a theoretical tool with the first implementation appearing in 1968...

 system in the late 1960s-early 1970s and became known for the development of supercompilation as a distinct method of program transformation
Program transformation
A program transformation is any operation that takes a computer program and generates another program. In many cases the transformed program is required to be semantically equivalent to the original, relative to a particular formal semantics and in fewer cases the transformations result in programs...

. After a brief description of the history of this research line, the paper concentrates on those results and problems where supercompilation is combined with repeated metasystem transitions.

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