chore: switch to antlr4

.vscode/launch.json

@@ -0,0 +1,15 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "pwa-node",
+            "request": "launch",
+            "name": "Debug File",
+            "skipFiles": [
+                "<node_internals>/**"
+            ],
+            "cwd": "${workspaceFolder}",
+            "args": ["--inspect", "--experimental-specifier-resolution=node", "./src/index.js"],
+        }
+    ]
+}

README.md

@@ -7,5 +7,6 @@ WARNING: This is a work in progress implementation of CEL. Any help is appreciat
 ## Roadmap
 
 - Add support for macros
-- Add support for macros via Public API
+- Add support for macro overloads
+- Support built in macros out-of-the-box
 - Run conformance tests against [cel-spec](https://github.com/google/cel-spec) repository.

babel.config.js

@@ -1,12 +1,12 @@
 module.exports = {
-  presets: [
+  "presets": [
     [
       "@babel/preset-env",
       {
-        targets: {
-          node: "current",
-        },
-      },
-    ],
-  ],
+        "targets": {
+          "esmodules": true
+        }
+      }
+    ]
+  ]
 };

bin/generate.sh

@@ -0,0 +1,8 @@
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+alias antlr4='java -jar ${DIR}/antlr-4.9-complete.jar'
+
+antlr4 -Dlanguage=JavaScript \
+    -o ${DIR}/../src/parser/gen \
+    -visitor ${DIR}/../src/parser/gen/CEL.g4
+