Library for parsing PGN (Portable Game Notation) files, based on the antlr4 parser.
The grammar of the PGN file format is credited to Bart Kiers, see the
PGN.g4.
To generate dart files based on the g4 file:
antlr4 -o lib/src/generated/ -Dlanguage=Dart -Xexact-output-dir antlr4/PGN.g4