Superouter v1 rewrite (#3)

.eslintrc.json

@@ -1,86 +1,22 @@
 {
-  "parserOptions": {
-    "ecmaVersion": 2017,
-    "sourceType": "module"
-  },
-  "env": {
-    "node": true,
-    "es6": true
-  },
-  "rules": {
-    "no-var": 1,
-    "no-undef": 2,
-    "no-unused-vars": [
-      "error",
-      {
-        "argsIgnorePattern": "_"
-      }
-    ],
-    "comma-style": [
-      "warn",
-      "first"
-    ],
-    "linebreak-style": [
-      "error",
-      "unix"
-    ],
-    "quotes": [
-      "error",
-      "single"
-    ],
-    "operator-linebreak": [
-      "warn",
-      "before",
-      {
-        "overrides": {
-          "=": "after"
-        }
-      }
-    ],
-    "quote-props": [
-      "warn",
-      "as-needed"
-    ],
-    "no-const-assign": [
-      "warn"
-    ],
-    "operator-assignment": [
-      "warn",
-      "never"
-    ],
-    "no-dupe-keys": [
-      "warn"
-    ],
-    "no-cond-assign": [
-      "warn"
-    ],
-    "no-extra-parens": [
-      "warn"
-    ],
-    "no-sparse-arrays": [
-      "warn"
-    ],
-    "array-callback-return": [
-      "error"
-    ],
-    "complexity": [
-      "warn"
-    ],
-    "no-param-reassign": [
-      "warn"
-    ],
-    "callback-return": [
-      "error"
-    ],
-    "max-depth": [
-      "warn",
-      4
-    ],
-    "max-len": [
-      "warn",
-      80,
-      4
-    ],
-    "consistent-return": 2
-  }
-}
+    "env": {
+        "browser": true,
+        "es2021": true,
+        "node": true
+    },
+    "extends": [
+        "eslint:recommended",
+        "plugin:@typescript-eslint/recommended"
+    ],
+    "parser": "@typescript-eslint/parser",
+    "parserOptions": {
+        "ecmaVersion": "latest",
+        "sourceType": "module"
+    },
+    "plugins": [
+        "@typescript-eslint"
+    ],
+    "rules": {
+        "@typescript-eslint/no-unused-vars": ["error", { "varsIgnorePattern": "_", "argsIgnorePattern": "_" }]
+    }
+}

.github/workflows/test.yml

@@ -10,12 +10,12 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [14.x, 16.x]
+        node-version: [20.x]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v2
+      uses: actions/setup-node@v3
       with:
         node-version: ${{ matrix.node-version }}
         cache: 'npm'

.vscode/launch.json

@@ -0,0 +1,24 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "test",
+            "type": "node",
+            "request": "launch",
+            "args": [
+                "--test",
+                "${relativeFile}"
+            ],
+            "runtimeArgs": [
+                "--import",
+                "tsx"
+            ],
+            "cwd": "${workspaceRoot}",
+            "protocol": "inspector",
+            "internalConsoleOptions": "openOnSessionStart"
+        }
+    ]
+}

lib/either.ts

@@ -0,0 +1,12 @@
+export type Either<L, R> =
+  | { type: "Either"; tag: "Left"; value: L }
+  | { type: "Either"; tag: "Right"; value: R };
+
+export const Either = {
+  Left<L, R>(value: L): Either<L, R> {
+    return { type: "Either", tag: "Left", value };
+  },
+  Right<L, R>(value: R): Either<L, R> {
+    return { type: "Either", tag: "Right", value };
+  },
+};