Implement grammar parser

This implements the grammar struct together with
some other helpful structures like char-set and character.

The grammar struct parses a grammar file and also generates
the FIRST and FOLLOWS tables.

1 files changed, 6 insertions, 0 deletions

diff --git a/default.nix b/default.nix
new file mode 100644
index 0000000..0bac3a3
--- /dev/null
+++ b/default.nix
@@ -0,0 +1,6 @@
+{ pkgs ? import <nixpkgs> { }, ... }:
+pkgs.mkShell {
+	packages = [
+		pkgs.zig
+	];
+}