ast2text — pretty-prints an abstract syntax tree to plain text
ast2text
[-w width
| --width width
]
[-p file
]
[-i file
| --input file
]
[-o file
| --input file
]
[-b]
[-S | --silent]
[--verbose level
]
[-k level
| --keep level
]
[-h | -? | --help]
[--about]
[--version]
The ast2text utility is used to pretty-print abstract syntax trees to plain text. The utility transforms an abstract syntax tree according to formatting rules contained in pretty-print tables. The result of ast2text is an ASCII text file. The tool is a convenience composition of ast2abox and abox2text.
To pretty-print an abstract syntax tree stored in the file
tree.trm
to text according to the
pretty-print rules in rules.pp
issue the
following command:
$
ast2text -i tree.trm -p rules.pp
Parsing and Formatting Options
-p file
Use pretty-print rules defined in
file
. Multiple tables can be
specified.
The file
must have the
extension .pp
or
.pp.af
. The .pp
extension is used for pretty-print tables in concrete
syntax. The .pp.af
extension is used
for pretty-print tables that have already been parsed
using parse-pp-table. Using
parsed pretty-print tables improves the performance of
ast2abox.
-w width
, --width width
Specifies maximal line width. Default is 80 characters.
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
.
-b
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
--about
See --version
.
-h
, -?
, --help
Display 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
.
--version
Displays the tool name and version.
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.