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#Introduction

ReverseGE is a GE-specific LR parser. Given a target string and a grammar which can generate the target string, ReverseGE will output a genome which will map to that same target string using that same grammar.

ReverseGE is based on PonyGE (https://github.com/jmmcd/ponyge2), and as such genomes produced by ReverseGE can be used to seed solutions in PonyGE.

The ReverseGE development team can be contacted at:

Michael Fenton <[email protected]>

ReverseGE is copyright (C) 2017.

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#Requirements

ReverseGE requires Python 3.5 or higher.

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#Running ReverseGE

We don't provide any setup script. You can run an example problem just by typing:

$ cd src
$ python LR_Parser.py

This will run an example problem which parses the following target string:

Hello world!

##Target String

The target string can be set by passing in the flag:

--target STRING

from the command line, where STRING is a string representing the target.

The target string can also be set directly in the parameters dictionary in src.algorithm.parameters.params.

##Grammar File

The grammar file can be specified by passing in the flag:

--grammar_file GRAMMAR

from the command line, where GRAMMAR is a string of the name of the grammar file to be used. Grammar files are located in the grammars folder.

The grammar file can also be set directly in the parameters dictionary in src.algorithm.parameters.params.

NOTE that the name of the grammar file requires the full file extension.

To see a full list of command line flags, just run the following:

$ python LR_Parser.py --help