forked from GitHub/gf-core
affdcf421e
By setting the environment variable GF_RESTRICTED before starting GF, the shell will be run in restricted mode. This will prevent the GF shell from starting arbitrary system commands (most uses of System.Cmd.system are blocked) and writing arbitrary files (most commands that use writeFile et al are blocked). Restricted mode is intended minimize the potential security risks involved in allowing public access to the GF shell over the internet. It should be used in conjuction with system level protection mechanisms (e.g. file permissions) to make sure that a publicly acessible GF shell does not give access to parts of the system that should not be publicly accessible.
DESCRIPTION
The Grammatical Framework (=GF) is a grammar formalism based on type theory.
It consists of
* a special-purpose programming language
* a compiler of the language
* a generic grammar processor
The compiler reads GF grammars from user-provided files, and the
generic grammar processor performs various tasks with the grammars:
* generation
* parsing
* translation
* type checking
* computation
* paraphrasing
* random generation
* syntax editing
GF particularly addresses four aspects of grammars:
* multilinguality (parallel grammars for different languages)
* semantics (semantic conditions of well-formedness, semantic
properties of expressions)
* grammar engineering (modularity, abstractions, libraries)
* embeddability in programs written in other languages (C,C++,
Haskell, Java, JavaScript)
COMPILATION and INSTALLATION of source distribution:
See doc/gf-developers.html for installation instructions.