add evaluator

Author: aaronjanse

Cargo.lock

@@ -13,14 +13,17 @@ version = "0.1.0"
 [dependencies]
 dirs = "2.0.2"
 env_logger = "0.7.1"
+gc = { version = "0.4", features = ["derive"] }
 lazy_static = "1.4"
 libc = "0.2.66"
 log = "0.4.8"
 lsp-server = "0.3.1"
 lsp-types = { version = "0.68.1", features = ["proposed"] }
 nixpkgs-fmt = "1.1.0"
+posix-regex = "0.1.1"
 regex = "1"
 rnix = "0.9.0"
 rowan = "0.12.6"
 serde = "1.0.104"
 serde_json = "1.0.44"
+sha2 = "0.9.3"