From 10058901d0703a9f2a4882c4d16c77d10d2145eb Mon Sep 17 00:00:00 2001
From: Justin Ridgewell <justin@ridgewell.name>
Date: Mon, 16 Mar 2020 11:30:38 -0400
Subject: [PATCH] Update Purish aliases (#11267)

* Update Purish aliases

- Adds `Purish` to `RegexLiteral`, since it can't cause any side-effects.
- Removes `Purish` from `ClassExpression` and `ClassDeclaration`, since they can be impure with static class fields.

* Update types
---
 packages/babel-types/src/definitions/core.js           | 2 +-
 packages/babel-types/src/definitions/es2015.js         | 4 ++--
 packages/babel-types/src/validators/generated/index.js | 3 +--
 3 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/packages/babel-types/src/definitions/core.js b/packages/babel-types/src/definitions/core.js
index 9461e36d3cc2..e7ba6f05d8a2 100644
--- a/packages/babel-types/src/definitions/core.js
+++ b/packages/babel-types/src/definitions/core.js
@@ -568,7 +568,7 @@ defineType("BooleanLiteral", {
 defineType("RegExpLiteral", {
   builder: ["pattern", "flags"],
   deprecatedAlias: "RegexLiteral",
-  aliases: ["Expression", "Literal"],
+  aliases: ["Expression", "Pureish", "Literal"],
   fields: {
     pattern: {
       validate: assertValueType("string"),
diff --git a/packages/babel-types/src/definitions/es2015.js b/packages/babel-types/src/definitions/es2015.js
index 853af1b12e65..e907dc45d6ac 100644
--- a/packages/babel-types/src/definitions/es2015.js
+++ b/packages/babel-types/src/definitions/es2015.js
@@ -124,7 +124,7 @@ defineType("ClassExpression", {
     "implements",
     "decorators",
   ],
-  aliases: ["Scopable", "Class", "Expression", "Pureish"],
+  aliases: ["Scopable", "Class", "Expression"],
   fields: {
     id: {
       validate: assertNodeType("Identifier"),
@@ -175,7 +175,7 @@ defineType("ClassExpression", {
 
 defineType("ClassDeclaration", {
   inherits: "ClassExpression",
-  aliases: ["Scopable", "Class", "Statement", "Declaration", "Pureish"],
+  aliases: ["Scopable", "Class", "Statement", "Declaration"],
   fields: {
     declare: {
       validate: assertValueType("boolean"),
diff --git a/packages/babel-types/src/validators/generated/index.js b/packages/babel-types/src/validators/generated/index.js
index 56c6193832c7..7ddf2fa31560 100644
--- a/packages/babel-types/src/validators/generated/index.js
+++ b/packages/babel-types/src/validators/generated/index.js
@@ -3847,9 +3847,8 @@ export function isPureish(node: ?Object, opts?: Object): boolean {
     "NumericLiteral" === nodeType ||
     "NullLiteral" === nodeType ||
     "BooleanLiteral" === nodeType ||
+    "RegExpLiteral" === nodeType ||
     "ArrowFunctionExpression" === nodeType ||
-    "ClassExpression" === nodeType ||
-    "ClassDeclaration" === nodeType ||
     "BigIntLiteral" === nodeType ||
     (nodeType === "Placeholder" && "StringLiteral" === node.expectedNode)
   ) {