From 8b04d7772b6f2dc879d924bdbc2103be15434610 Mon Sep 17 00:00:00 2001
From: Jordan Orelli <jordanorelli@gmail.com>
Date: Thu, 24 Dec 2020 23:28:05 +0000
Subject: [PATCH] box explainer

---
 box.zig | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/box.zig b/box.zig
index 5e42857..156874e 100644
--- a/box.zig
+++ b/box.zig
@@ -14,21 +14,23 @@ const Point = struct {
 
 pub fn main() !void {
     var vbox = Box(Point){
-        .value = undefined,
+        .value = undefined, // this is gonna be junk
     };
     try stdout.print("var box with undefined: {}\n", vbox);
 
     var vbox2 = Box(Point){
-        .value = Point{},
+        .value = Point{}, // this is the default value
     };
     try stdout.print("var box with explicit defaults: {}\n", vbox2);
 
+    // looks like the value of this winds up in bss.
+    // https://en.wikipedia.org/wiki/.bss
     const cbox = Box(Point){
-        .value = undefined,
+        .value = undefined, // this is zeroed out memory
     };
     try stdout.print("const box with undefined: {}\n", cbox);
 
     try stdout.print("Box literal with undefined: {}\n", Box(Point){
-        .value = undefined,
+        .value = undefined, // this is also zeroed out memory
     });
 }