From 7ac31cfd8ca5442eb3650e3c03626a34d67e4234 Mon Sep 17 00:00:00 2001
From: Gael <85808999+TheGreatSageEqualToHeaven@users.noreply.github.com>
Date: Mon, 14 Aug 2023 15:48:33 +0100
Subject: [PATCH] Update read-only-environment.md

---
 rfcs/read-only-environment.md | 21 ++++-----------------
 1 file changed, 4 insertions(+), 17 deletions(-)

diff --git a/rfcs/read-only-environment.md b/rfcs/read-only-environment.md
index 21488768..300b9a4c 100644
--- a/rfcs/read-only-environment.md
+++ b/rfcs/read-only-environment.md
@@ -2,32 +2,19 @@
 
 ## Summary
 
-Add a way to access a read-only version of the environment without disabling `safeenv`.
+Add `_ENV` as a safe alternative to `getfenv`.
 
 ## Motivation
 
 There are valid use cases for accessing the environment in a read-only way. As defined in the [RFC](https://github.com/Roblox/luau/blob/master/rfcs/deprecate-getfenv-setfenv.md) for deprecating 
 getfenv and setfenv there are outlined cases where reading the environment is useful.
 
-Increased performance can be achieved for transpilers written in Luau that may not be able to have a static environment created to access functions from or cant directly transpile 1:1. Similarly
-interpreters written in Luau can benefit from being able to access functions without deoptimization, making other optimizations still active.
+Increased performance can be achieved for transpilers written in Luau that may not be able to have a static environment created to access functions from or cant directly transpile 1:1. Similarly interpreters written in Luau can benefit from being able to access functions without deoptimization, making other optimizations still active.
 
 ## Design
 
-A safe way to access the environment is with a read-only table with `__index` and `__iter` metamethods.
-
-a) `_ENV` table 
-
-A read-only global table with metamethods that point to `LUA_ENVIRONINDEX`.
-
-b) `getenv` or `getrenv` function 
-
-Works identically to `getfenv` but only provides read-only access to the function's environment.
+A read-only global table `_ENV` with clones of all base functions and libraries. 
 
 ## Drawbacks
 
-Type-checking can be difficult.
-
-Roblox's marketplace currently hides assets that use `getfenv` so it would need to be updated to hide assets with `_ENV`/`getenv`/`getrenv`.
-
-Environments can have metamethods of their own which may not interface well with a read-only `getenv`/`getrenv`.
+Roblox's marketplace currently hides assets that use `getfenv` so it would need to be updated to hide assets with `_ENV`.