parse-stratego — parses a Stratego source file
parse-stratego
[-I dir
| --Include dir
]
[--syntax syn
]
[--default-syntax syn
]
[--asfix]
[--desugaring on|off
]
[--assimilation on|off
]
[]
[-i file
| --input file
]
[-o file
| --outputfile
]
[-S | --silent]
[--verbose level
]
[--k level
| --keep level
]
[-h | -? | --help]
[--about]
[--version]
The parse-stratego utility is used to parse Stratego source files. The result of the parsing is an abstract syntax tree of the input program, output as a binary ATerm.
Stratego source code may include modules from other directories. Specifying the search
path is done by the -I
option. A parse error will occur if all referenced
modules cannot be found. By default the standard library is automatically included in
the search path.
Stratego source code can be extended with embedded languages having their own concrete
syntax, making Stratego a syntactically extensible language. When the source code contains
a Stratego program extended in this way, parse-stratego must be told
which syntax to use when parsing the source code. This is the task of the
--syntax
and --default-syntax
options.
As a part of embedding languages in Stratego, the new language constructs can be
translated into Stratego library functions and code. This is called assimilation, and
is controlled by the --assimilation
switch.
Module and Syntax Options
-I dir
, --Include dir
Add dir
to the module search path.
--syntax syn
Use syntax syn
.
--default-syn syn
Use syntax syn
as the default syntax.
--asfix
Use the AsFix format.
--desugaring on | off
Toggle desugaring on/off. Default is off
--assimilation on | off
Toggle assimilation on/off. Default is on.
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.
Given the file myunit.str
given below.
module myunit imports sunit signature constructors F: A -> F A: A strategies main = test-suite(!"foo", apply-test( !"all-test1a" , all(id) , !F(A) , !F(A) ) )
We can obtain the abstract syntax tree for this program as an ATerm by issuing the following command:
$
parse-stratego -i myunit.str -o tree.trm
The result will be the following term:
Module( "parse-stratego-example" , [ Imports([Import("sunit")]) , Signature( [ Constructors( [ OpDecl( "F" , FunType([ConstType(SortNoArgs("A"))], ConstType(SortNoArgs("F"))) ) , OpDecl("A", ConstType(SortNoArgs("A"))) ] ) ] ) , Strategies( [ SDefNoArgs( "main" , Call( SVar("test-suite") , [ Build(NoAnnoList(Str("\"foo\""))) , Call( SVar("apply-test") , [ Build(NoAnnoList(Str("\"all-test1a\""))) , All(Id) , Build(NoAnnoList(Op("F", [Var("A")]))) , Build(NoAnnoList(Op("F", [Var("A")]))) ] ) ] ) ) ] ) ] )
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.