LEF/DEF input and output module for LibrEDA.
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LEF/DEF parser and writer

Work in progress

LEF (Library Exchange Format) and DEF (Design Exchange Format) are industry standard file formats for describing standard cell libraries, technology data (LEF) and whole designs including layout and netlists (DEF).

This crate provides input and output functions for this formats including datastructures for their representation.


LEF/DEF: http://www.ispd.cc/contests/18/lefdefref.pdf


  • The program code is licenced under AGPLv3
  • Some test data from FreePDK45 and Sky130 is licenced under Apache 2.0