sdf2parenthesize — generates a Stratego module that puts parenthetical constructors at the correct places.
sdf2parenthesize
[-m mod | --main mod]
[--omod module]
[--main-strategy strategy]
[--sig-module module]
[--lang lang]
[--rule-prefix string]
[-i file | --input file]
[-o file | --input file]
[-b]
[-S | --silent]
[--verbose level]
[-k level | --keep level]
[--check]
[-h | -? | --help]
[--about]
[--version]
The sdf2parenthesize utility is used to generate a Stratego transformation tool that adds the necessary parentheses to an abstract syntax tree. The information is obtained from an SDF syntax definition.
The following SDF situations are supported by sdf2parenthesize:
Relative priorities
Exp "&&" Exp -> Exp > Exp "||" Exp -> Exp
Groups of associative productions
{left:
Exp "*" Exp -> Exp
Exp "/" Exp -> Exp
}
> {left:
Exp "+" Exp -> Exp
Exp "-" Exp -> Exp
}
Associativity attributes: non-assoc, assoc, left, right.
Exp "+" Exp -> Exp {left, cons("Plus")}
Kernel SDF associativities
prod1 assoc prod2
Generator Options
-m mod, --main mod
Set the main module in the SDF syntax definition to
modMain.
--omod modSet the name of the resulting Stratego module. The default is to use the filename (basename, i.e. without file type suffix) of the output file.
--main-strategy strategy
Set the name of the main strategy for the generated tool. The
default is to use io-,
where modulemodule is the module name.
--sig-module module
Specify the Stratego module which contains the signature for the language.
The default is to use language, see the
--lang option.
--lang languageName of the language. The default is to use the basename of the output file.
--rule-prefix string
Prefix to use for the generated parenthesize rules. The default is
to use language, see the --lang
option.
Common Input/Output Options
-i file
The input term given by the file name file
In the absence of the -i option, input
will be read from stdin.
-o file
The output will be written to the file given by the file name
file
In the absence of the -o option,
output will be written to stdout.
-bThe 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
--about
See --version.
-h, -?, --helpDisplay usage information.
--keep int
Keep intermediate results produced by the internal stages in the
pretty-printing process. This is only useful for debugging. A high
value of int indicates increased eagerness
for keeping intermediate results.
Default setting is 0, indicating that no intermediates will be kept.
-S, --silent
Silent execution. Same as --verbose .
0
--verbose int
Set verbosity level to numerical value int. The
higher the number, the more information about pp-aterm's inner workings are
printed.
Alternatively, int can be set to either of the
following verbosity levels, given in increasing order of verbosity:
emergency, alert, critical,
error, warning, notice,
info, debug, vomit.
--versionDisplays the tool name and version.
Assume Plus is declared as left associative. In this case,
sdf2parenthesize will create the following rule:
ExpParenthesize : Plus(q_15, Plus(o_15, p_15)) -> Plus(q_15, Parenthetical(Plus(o_15, p_15)))
The following shows how sdf2parenthesize deals with relative priorities.
ExpParenthesize : Mul(Plus(v_2, w_2), u_2) -> Mul(Parenthetical(Plus(v_2, w_2)), u_2) ExpParenthesize : Mul(t_2, Plus(v_2, w_2)) -> Mul(t_2, Parenthetical(Plus(v_2, w_2)))
Copyright (C) 2002-2005 Eelco Visser <visser@acm.org>
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.