Name

ast2abox — pretty prints an abstract syntax tree to the Box layout formalism

Synopsis

ast2abox [-p file] [-i file | --input file] [-o file | --input file] [-b] [-S | --silent] [--verbose level] [-k level | --keep level] [-h | -? | --help] [--about] [--version]

Description

The ast2abox utility is used to pretty-print abstract syntax trees. The utility transforms an abstract syntax tree according to formatting rules contained in pretty-print tables, supplied by the -p option. The result of ast2abox is a Box term which describes the intended format. This term can be passed to a formatter which transforms the Box term to some output format.

Consult abox2text for pretty-printing to plain text.

Options

Parsing Options

-p file

Use the pretty print table in file. Required 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.

-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.

Examples

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:

$ ast2abox -i tree.trm -p rules.pp | abox2text

Reporting Bugs

Please report bugs to

Copyright

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.