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The system_pipe (aka "?") command creates a temporary file _tmpi containing the input of the system command. It *both* appends _tmpi as an extra argument to the system command line *and* adds an input redirection "< _tmpi". (It also uses and output redirection "> _tmpo" to captures the output of the command.) With this patch, the _tmpi argument is no longer appended to the command line. This allows system_pipe to work with pure filters, such as the "tr" commands, but it will no longer work with commands that require an input file name. (It is possible to use write_file instead...) TODO: it would also be fairly easy to eliminate the creation of the _tmpi and _tmpo files altogether.
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.)