OCaml implementation of operations in Program Algebra

Taddeus Kroes 3e754a515d Better errors for unmatching parentheses 11 anni fa
.gitignore 9340893b20 Added basic PGA parser and printer 11 anni fa
Makefile 9340893b20 Added basic PGA parser and printer 11 anni fa
parse.ml 3e754a515d Better errors for unmatching parentheses 11 anni fa
pga.ml 23418c16e1 Added better error checking 11 anni fa
stringify.ml 23418c16e1 Added better error checking 11 anni fa
types.ml 23418c16e1 Added better error checking 11 anni fa