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OpenToken lexical analysis library for Ada (development)

OpenToken is a facility for performing token analysis within the Ada language. It is designed to provide all the functionality of a traditional lexical analyzer generator, such as lex. But due to the magic of inheritance and runtime polymorphism it is implemented entirely in Ada as withed-in code. No precompilation step is required, and no messy tool-generated source code is created.

This package contains the development files and associated documentation.

Package version:4.0b-2


libopentoken for Debian

See the Debian Ada policy at

 -- Stephen Leake <>, Tue, 29 Jun 2010 03:36:25 -0400


This directory contains various implementations of Example 5.10,
section 5.3, page 295 from [1] "Compilers Principles, Techniques,
and Tools" by Aho, Sethi, and Ullman (aka: "The Dragon Book").

The grammar in that example is:

L -> E n       print (val[top])
E -> E1 + T    val[ntop] := val[top - 2] + val[top]
E -> T
T -> T1 * F    val[ntop] := val[top - 2] * val[top]
T -> F
F -> ( E )     val[nto


opentoken (4.0b-2) unstable; urgency=low

  * new upstream version 4.0b; packaging changes only
  * debian/control (Architecture): change to 'any', matching
    gnat-4.4. Closes: #568450

 -- Stephen Leake <>  Tue, 29 Jun 2010 03:37:18 -0400

opentoken (4.0a-1) unstable; urgency=low

  [Stephen Leake]
  * update to upstream version 4.0a; mtn tag "version_4.0a". Req


Name: OpenTo

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