From ed625cb2e153841e9c729b4a66adb7f4f518e213 Mon Sep 17 00:00:00 2001
From: Mathias Bynens <mathias@qiwi.be>
Date: Tue, 10 Jan 2017 20:14:11 +0100
Subject: [PATCH] Remove `String.fromCodePoint` shim (#279)

This is not necessary anymore if we drop support for Node.js v0.10 and v0.12.

Ref. https://github.com/babel/babel/issues/4315.
---
 src/plugins/jsx/fromCodePoint.js             | 66 --------------------
 src/plugins/jsx/index.js                     |  6 +-
 test/fixtures/jsx/basic/entity/expected.json |  4 +-
 3 files changed, 4 insertions(+), 72 deletions(-)
 delete mode 100644 src/plugins/jsx/fromCodePoint.js

diff --git a/src/plugins/jsx/fromCodePoint.js b/src/plugins/jsx/fromCodePoint.js
deleted file mode 100644
index a69acf7686..0000000000
--- a/src/plugins/jsx/fromCodePoint.js
+++ /dev/null
@@ -1,66 +0,0 @@
-// Adapted from String.fromcodepoint to export the function without modifying String
-/*! https://mths.be/fromcodepoint v0.2.1 by @mathias */
-
-// The MIT License (MIT)
-// Copyright (c) Mathias Bynens
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
-// associated documentation files (the "Software"), to deal in the Software without restriction,
-// including without limitation the rights to use, copy, modify, merge, publish, distribute,
-// sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in all copies or
-// substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
-// NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-let fromCodePoint = String.fromCodePoint;
-
-if (!fromCodePoint) {
-  const stringFromCharCode = String.fromCharCode;
-  const floor = Math.floor;
-  fromCodePoint = function() {
-    const MAX_SIZE = 0x4000;
-    const codeUnits = [];
-    let highSurrogate;
-    let lowSurrogate;
-    let index = -1;
-    const length = arguments.length;
-    if (!length) {
-      return "";
-    }
-    let result = "";
-    while (++index < length) {
-      let codePoint = Number(arguments[index]);
-      if (
-        !isFinite(codePoint) || // `NaN`, `+Infinity`, or `-Infinity`
-        codePoint < 0 || // not a valid Unicode code point
-        codePoint > 0x10FFFF || // not a valid Unicode code point
-        floor(codePoint) != codePoint // not an integer
-      ) {
-        throw RangeError("Invalid code point: " + codePoint);
-      }
-      if (codePoint <= 0xFFFF) { // BMP code point
-        codeUnits.push(codePoint);
-      } else { // Astral code point; split in surrogate halves
-        // https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
-        codePoint -= 0x10000;
-        highSurrogate = (codePoint >> 10) + 0xD800;
-        lowSurrogate = (codePoint % 0x400) + 0xDC00;
-        codeUnits.push(highSurrogate, lowSurrogate);
-      }
-      if (index + 1 == length || codeUnits.length > MAX_SIZE) {
-        result += stringFromCharCode.apply(null, codeUnits);
-        codeUnits.length = 0;
-      }
-    }
-    return result;
-  };
-}
-
-export default fromCodePoint;
diff --git a/src/plugins/jsx/index.js b/src/plugins/jsx/index.js
index bd4633a095..31bf94de8b 100644
--- a/src/plugins/jsx/index.js
+++ b/src/plugins/jsx/index.js
@@ -1,7 +1,5 @@
 /* eslint indent: 0 */
 
-import fromCodePoint from "./fromCodePoint";
-
 import XHTMLEntities from "./xhtml";
 import { TokenType, types as tt } from "../../tokenizer/types";
 import { TokContext, types as tc } from "../../tokenizer/context";
@@ -138,11 +136,11 @@ pp.jsxReadEntity = function() {
         if (str[1] === "x") {
           str = str.substr(2);
           if (HEX_NUMBER.test(str))
-            entity = fromCodePoint(parseInt(str, 16));
+            entity = String.fromCodePoint(parseInt(str, 16));
         } else {
           str = str.substr(1);
           if (DECIMAL_NUMBER.test(str))
-            entity = fromCodePoint(parseInt(str, 10));
+            entity = String.fromCodePoint(parseInt(str, 10));
         }
       } else {
         entity = XHTMLEntities[str];
diff --git a/test/fixtures/jsx/basic/entity/expected.json b/test/fixtures/jsx/basic/entity/expected.json
index 69f4b59ea6..8e4d867723 100644
--- a/test/fixtures/jsx/basic/entity/expected.json
+++ b/test/fixtures/jsx/basic/entity/expected.json
@@ -136,7 +136,7 @@
                 }
               },
               "extra": null,
-              "value": "💩"
+              "value": "\uD83D\uDCA9"
             }
           ]
         }
@@ -144,4 +144,4 @@
     ],
     "directives": []
   }
-}
\ No newline at end of file
+}