From 848e5c4e33d7da3f911db2a9f283d335df09daa6 Mon Sep 17 00:00:00 2001
From: darkicewolf50 <brock.tomlinson@ucalgary.ca>
Date: Fri, 11 Apr 2025 11:26:46 -0600
Subject: [PATCH] finished ch20 intro

---
 .obsidian/workspace.json | 22 ++++++++++++++++++----
 Advanced Features.md     | 15 +++++++++++++++
 Unsafe Rust.md           |  1 +
 3 files changed, 34 insertions(+), 4 deletions(-)
 create mode 100644 Unsafe Rust.md

diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index e1f8c8c..6d5c1b5 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -63,6 +63,20 @@
               "title": "Advanced Features"
             }
           },
+          {
+            "id": "8cdde5c4be386d20",
+            "type": "leaf",
+            "state": {
+              "type": "markdown",
+              "state": {
+                "file": "Unsafe Rust.md",
+                "mode": "source",
+                "source": false
+              },
+              "icon": "lucide-file",
+              "title": "Unsafe Rust"
+            }
+          },
           {
             "id": "78cd7043d5d51ffa",
             "type": "leaf",
@@ -116,7 +130,7 @@
             }
           }
         ],
-        "currentTab": 3
+        "currentTab": 4
       }
     ],
     "direction": "vertical"
@@ -259,10 +273,11 @@
       "command-palette:Open command palette": false
     }
   },
-  "active": "de2ac5df5b921166",
+  "active": "8cdde5c4be386d20",
   "lastOpenFiles": [
-    "Pattern Matching.md",
     "Advanced Features.md",
+    "Unsafe Rust.md",
+    "Pattern Matching.md",
     "Places Patterns Can Be Used.md",
     "Pattern Syntax.md",
     "Refutability.md",
@@ -286,7 +301,6 @@
     "Leaky Reference Cycles.md",
     "Test Controls.md",
     "Ref Cell Mutability.md",
-    "Reference Counter Smart Pointer.md",
     "minigrep/src/lib.rs",
     "does_not_compile.svg",
     "Untitled.canvas",
diff --git a/Advanced Features.md b/Advanced Features.md
index 4472c74..ad1d426 100644
--- a/Advanced Features.md	
+++ b/Advanced Features.md	
@@ -1 +1,16 @@
 # Advanced Features
+So far we learned about the most commonly used parts of the Rust programming language.
+
+Here we will look at a few aspects of the language you may run into once in a while but may not use everyday.
+
+This is intended to be used as a reference for when you encounter any unknowns.
+
+The features covered here are useful in very specific situations.
+
+In this chapter we will cover
+- [Unsafe Rust](./Unsafe%20Rust.md): How to opt out of some of Rust's guarantees and take responsibility for manually upholding those guarantees
+- [Advanced traits](): associated types, default type parameters, fully qualified syntax, supertraits, and the new type pattern in relation to traits
+- [Advanced types](): more about the newtype pattern, type aliases, the never type, and dynamically sized types
+- [Advanced functions and closures](): function pointers and returning closures
+- [Macros](): ways to define code that defines more code at compile time
+a
\ No newline at end of file
diff --git a/Unsafe Rust.md b/Unsafe Rust.md
new file mode 100644
index 0000000..b119af3
--- /dev/null
+++ b/Unsafe Rust.md	
@@ -0,0 +1 @@
+# Unsafe Rust