pp-stratego — pretty-prints a Stratego program


pp-stratego [-a | --abstract] [--annotations] [-I dir | --Include dir] [-p file] [-i file | --input file] [-o file | --output file] [-b] [-S | --silent] [--verbose level] [-k level | --keep level] [-h | -? | --help] [--about] [--version]


The pp-stratego utility is used to pretty-print Stratego source code to concrete syntax. It has two different modes of operation, depending on whether the input is in abstract syntax (an .rtree file) or concrete syntax (an .str file).

In concrete syntax mode, pp-stratego pretty-prints a Stratego module in concrete syntax (.str) to concrete syntax by first parsing it and afterwards pretty printing it. This is a useful operation for inspecting the meaning of concrete object syntax fragments. This is the default mode.

In abstract syntax mode, pp-stratego --abstract pretty-prints a Stratego module in abstract syntax (.rtree) to Stratego concrete syntax.


Input/Output Options

-a, --abstract

Input Stratego module is in abstract syntax.


Print annotations on the abstract syntax tree.

-I dir, -Include dir

Include modules from directory dir.

-p file

Use pretty-print table file instead of the default builtin.

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.


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


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.


Displays the tool name and version.

Reporting Bugs

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.