README.md

Anchor Removal Operator for EcmaScript Regular Expressions

This project contains a program to translate a regular expression from ECMAScript syntax into the one used in the Java library dk.brics.automaton.
Another tool is the evaluation of JSON files containing patterns in ECMAScript syntax.

Authors

Algorithm design: Dominik Freydenberger (Loughborough University)
Implementation: Christoph Köhnen (University of Passau)

Installation and Build Process

To install and build this program, type the following:

git clone https://github.com/sdbs-uni-p/EcmaScript2Brics
cd EcmaScript2Brics
./build-dependencies.sh

Usage of the program

For a regular expression <regExp> the brics expression can be obtained with the following line:

java -jar EcmaScript2Brics.jar "<regExp>"

The expression must be typed in unescaped and the result is java-escaped, i.e. \n does not cause a linebreak by printing the output.

Example

For a pattern ^\\d$ from a JSON document the unescaped version is ^\d$. The command lines look as follows:

java -jar EcmaScript2Brics.jar "^\d$"
The Brics expression is: [0-9]

Citation

To refer to this project in a publication, please use this BibTeX entry.

@Misc{anchor_removal,
  author =  {Dominik Freydenberger and Christoph K\"ohnen and Stefanie Scherzinger},
  title =   {Anchor Removal Operator for ECMAScript Regular Expressions},
  note =    {\url{https://github.com/sdbs-uni-p/EcmaScript2Brics}},
  year =    2021
}

Acknowledgement

This work was partly funded by Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) grant #385808805.