**Group :: Desenvolvimento/Funcional**

RPM: refal-plus

**Principal** Changelog Spec Patches Sources Download Gear Bugs e FR Repocop

**A versão atual:** 4137-alt3

**Data da compilação:** 29 janeiro 2019, 14:22 ( 78.9 weeks ago )

**Tamanho::** 1322.30 Kb

**Home page:** http://rfp.botik.ru/

**Licença:** GPLv2

**Sumário:** A modern dialect of Refal programming language

**Descrição:**

Refal Plus is a modern dialect of Refal programming language.

Refal (REcursive Functions Algorithmic Language) was originally

developed in the middle of 1960s by V.F.Turchin as a tool for describing

the semantics of other algorithmic languages. Later, when reasonably

efficient Refal implementations had been created, Refal was used as

a symbol manipulation language in such fields as computer algebra,

compiler and interpreter writing, artificial intelligence, etc.

The principal data type in Refal are arbitrary trees, referred to as

ground expressions. In programs and text files ground expressions are

represented by linear sequences of symbols and parentheses, with

parentheses being properly paired. Symbols represent such elementary

data objects as characters, words, numbers and references to objects.

The principal means of analyzing and accessing ground expressions is

pattern matching. Refal patterns may contain symbols, parentheses, and

variables. If matching a ground expression against a pattern succeeds,

the pattern's variables are bound to the corresponding components of the

ground expression, which can be used later for building new ground

expressions.

Refal Plus has been developed taking into account the experience gained

from the design, implementation and use of such languages as Basic

Refal, Refal-2, Refal-4, Refal-5 and RL.

As compared to the other Refal dialects, Refal Plus provides the

following features:

* Advanced modules support

* Static declarations of dynamic objects

* Significantly improved function declarations

* Failure and error trapping

* Input/output of ground expressions

* Operations on boxes, vectors, and tables

* "Vector" representation of ground expressions

Refal (REcursive Functions Algorithmic Language) was originally

developed in the middle of 1960s by V.F.Turchin as a tool for describing

the semantics of other algorithmic languages. Later, when reasonably

efficient Refal implementations had been created, Refal was used as

a symbol manipulation language in such fields as computer algebra,

compiler and interpreter writing, artificial intelligence, etc.

The principal data type in Refal are arbitrary trees, referred to as

ground expressions. In programs and text files ground expressions are

represented by linear sequences of symbols and parentheses, with

parentheses being properly paired. Symbols represent such elementary

data objects as characters, words, numbers and references to objects.

The principal means of analyzing and accessing ground expressions is

pattern matching. Refal patterns may contain symbols, parentheses, and

variables. If matching a ground expression against a pattern succeeds,

the pattern's variables are bound to the corresponding components of the

ground expression, which can be used later for building new ground

expressions.

Refal Plus has been developed taking into account the experience gained

from the design, implementation and use of such languages as Basic

Refal, Refal-2, Refal-4, Refal-5 and RL.

As compared to the other Refal dialects, Refal Plus provides the

following features:

* Advanced modules support

* Static declarations of dynamic objects

* Significantly improved function declarations

* Failure and error trapping

* Input/output of ground expressions

* Operations on boxes, vectors, and tables

* "Vector" representation of ground expressions

**Mantenedor currente:** Fr. Br. George

**Lista dos contribuidores**

**Lista dos rpms provida por esta srpm:**

- refal-plus
- refal-plus-debuginfo
- refal-plus-devel
- refal-plus-samples

**ACL:**