SdfOption

Introduction

When writing a grammar using Projects.SDF (the Syntax Definition Formalism), optional literals are a very convenient construct. The problem is that they can not be manipulated in abstract syntax trees, because they can not be assigned a constructor name.

sdf-option introduces intermediate non-terminals to remove optional literals.

How does it work?

Source:

::? NestedNameSpec? ClassName -> BaseSpec
virtual AccessSpec? ::? NestedNameSpec? ClassName -> BaseSpec
AccessSpec virtual? ::? NestedNameSpec? ClassName -> BaseSpec

After optional literals removing:

virtual -> Dummy7
:: -> Dummy0

Dummy0? NestedNameSpec? ClassName -> BaseSpec
virtual AccessSpec? Dummy0? NestedNameSpec? ClassName -> BaseSpec
AccessSpec Dummy7? Dummy0? NestedNameSpec? ClassName -> BaseSpec

Usage

$ parse-sdf-definition -i grammar.def | \ 
  sdf-option | \ 
  pp-sdf -o grammar-no-opt.def

Installation

Dependencies

You need StrategoXT 0.9.1.

Download

You can download the last tarball at: sdf-option-0.1.tar.bz2: sdf-option v0.1

Compilation

Untar the tarball. Then in the tarball directory, type:

$ ./configure --with-xt=<PATH> --prefix=<PATH>
$ make
$ make install

Do not forget to change "<PATH>" to your values.

TransformersZone

• Transformers: Project page
• CTransformers: Transformers for the C99 language
• CxxTransformers: Transformers for the C++03 language
• Manual: How to use Transformers
• Related links: References to relevant papers and web pages
• Contributors: Who does what
• Roadmap: Thrilling and exciting plans for the future
• Release page: Latest stable version
• Trac: Bug/issue tracker
• ViewSVN: Subversion repository browser

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