rtg2sig — generates a Stratego signature from a regular tree grammar (RTG)
file | --input
file | --output
[-S | --silent]
level | --keep
[-h | -? | --help]
The rtg2sig utility is used to generates a Stratego signature from a regular tree grammar.
Specifies that the module name of the resulting Stratego file should
not given, the output file name is used. If that is not known, the
input file name is used.
Common Input/Output Options
The input term given by the file name
In the absence of the
-i option, input
will be read from
The output will be written to the file given by the file name
In the absence of the
output will be written to
The output will be written in the binary (BAF) ATerm format.
ATerms in the BAF format require a lot less space than ones in the TAF format, but the Java ATerm library does not currently support baf ATerms. ATerms in the baf format is the preferred format of exchange between Stratego tools.
Common Debugging Options
Display usage information.
Keep intermediate results produced by the internal stages in the
pretty-printing process. This is only useful for debugging. A high
int indicates increased eagerness
for keeping intermediate results.
Default setting is 0, indicating that no intermediates will be kept.
Silent execution. Same as
Set verbosity level to numerical value
higher the number, the more information about pp-aterm's inner workings are
int can be set to either of the
following verbosity levels, given in increasing order of verbosity:
Displays the tool name and version.
Consider the regular tree grammar given below (the exciting part about how we created this from an SDF definition can be gleaned from the example for sdf2rtg):
regular tree grammar start Exp productions Exp -> Minus(Exp,Exp) Exp -> Plus(Exp,Exp) Exp -> Mod(Exp,Exp) Exp -> Div(Exp,Exp) Exp -> Mul(Exp,Exp) Exp -> Int(IntConst) Exp -> Var(Id) IntConst -> <string> Id -> <string>
Provided that this this regular tree grammar is stored in the file
Exp.rtg, it can be converted into a Stratego
signature using rtg2sig, as follows:
$rtg2sig -i Exp.rtg -o Exp.str
The resulting Stratego signature given below may be used directly
by your Stratego programs by importing the
module Exp imports list-cons option signature constructors Minus : Exp * Exp -> Exp Plus : Exp * Exp -> Exp Mod : Exp * Exp -> Exp Div : Exp * Exp -> Exp Mul : Exp * Exp -> Exp Int : IntConst -> Exp Var : Id -> Exp : String -> IntConst : String -> Id
Please report bugs to
Copyright (C) 2002-2005 Eelco Visser
This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.