1 files changed, 66 insertions, 0 deletions
diff --git a/code/old_demos/demo004.odin b/code/old_demos/demo004.odin
new file mode 100644
index 000000000..80812cd18
--- /dev/null
+++ b/code/old_demos/demo004.odin
@@ -0,0 +1,66 @@
+#import "fmt.odin"
+#import "utf8.odin"
+#import "hash.odin"
+#import "mem.odin"
+
+main :: proc() {
+	{ // New Standard Library stuff
+		s := "Hello"
+		fmt.println(s,
+		            utf8.valid_string(s),
+		            hash.murmur64(s.data, s.count))
+
+		// utf8.odin
+		// hash.odin
+		//     - crc, fnv, fnva, murmur
+		// mem.odin
+		//     - Custom allocators
+		//     - Helpers
+	}
+
+	{
+		arena: mem.Arena
+		mem.init_arena_from_context(^arena, mem.megabytes(16)) // Uses default allocator
+		defer mem.free_arena(^arena)
+
+		push_allocator mem.arena_allocator(^arena) {
+			x := new(int)
+			x^ = 1337
+
+			fmt.println(x^)
+		}
+
+		/*
+			push_allocator x {
+				...
+			}
+
+			is equivalent to:
+
+			{
+				prev_allocator := __context.allocator
+				__context.allocator = x
+				defer __context.allocator = prev_allocator
+
+				...
+			}
+		*/
+
+		// You can also "push" a context
+
+		c := current_context() // Create copy of the allocator
+		c.allocator = mem.arena_allocator(^arena)
+
+		push_context c {
+			x := new(int)
+			x^ = 365
+
+			fmt.println(x^)
+		}
+	}
+
+	// Backend improvements
+	// - Minimal dependency building (only build what is needed)
+	// - Numerous bugs fixed
+	// - Mild parsing recovery after bad syntax error
+}