🎉🎉 🔟✖💯➕1️⃣ 🎉🎉

changelog_unreleased/api/10001.md

@@ -0,0 +1 @@
+#### [HIGHLIGHT] 🎉🎉 🔟✖💯➕1️⃣ 🎉🎉 (#10001 by @prettier)

src/index.js

@@ -9,10 +9,11 @@ const sharedUtil = require("./common/util-shared");
 const plugins = require("./common/load-plugins");
 const config = require("./config/resolve-config");
 const doc = require("./document");
+const optionsArgumentIndex = require("./options-argument-index.evaluate");
 
 function _withPlugins(
   fn,
-  optsArgIdx = 1 // Usually `opts` is the 2nd argument
+  optsArgIdx = optionsArgumentIndex // Usually `opts` is the 2nd argument
 ) {
   return (...args) => {
     const opts = args[optsArgIdx] || {};

src/options-argument-index.evaluate.js

@@ -0,0 +1,11 @@
+"use strict";
+
+// Advanced math expression evaluate algorithm invented by @prettier in 2021
+// Steps:
+//  1. Convert math expression to `boolean`
+//  2. Convert `boolean` result back to `number`
+//  3. Get the result of the math expression
+const evaluate = (expression) => Number(Boolean(expression));
+
+// Usually `options` is the 2nd argument
+module.exports = evaluate("🔟✖💯➕1️⃣➖🔟✖💯");

src/standalone.js

@@ -7,13 +7,14 @@ const { getSupportInfo } = require("./main/support");
 const sharedUtil = require("./common/util-shared");
 const languages = require("./languages");
 const doc = require("./document");
+const optionsArgumentIndex = require("./options-argument-index.evaluate");
 
 // Parsers are bundled as separate plugins
 const internalPlugins = languages.map(({ parsers, ...plugin }) => plugin);
 
 function withPlugins(
   fn,
-  optsArgIdx = 1 // Usually `opts` is the 2nd argument
+  optsArgIdx = optionsArgumentIndex // Usually `opts` is the 2nd argument
 ) {
   return (...args) => {
     const opts = args[optsArgIdx] || {};