forked from GitHub/gf-core
add8f9285b
IOE used to be a monad with extra error handling built on top of the IO monad, But the IO monad already supports error handling, so this construction was a superfluous. The new 'instance ErrorMonad IOE' is defined to preserve the previous error handling behaviour, i.e. the function 'handle' only catches errors thrown with 'raise' (or 'fail') and not other errors in the IO monad.
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 download/index.html for installation instructions.
(More details can be found in doc/gf-developers.html.)