add defer

Author: ziteh

defer/basic.zig

@@ -0,0 +1,10 @@
+const print = @import("std").debug.print;
+
+pub fn main() !void {
+    var x: u8 = 10;
+    {
+        defer x += 1;
+        print("X: {}\n", .{x});
+    }
+    print("X: {}\n", .{x});
+}

defer/block.zig

@@ -0,0 +1,13 @@
+const print = @import("std").debug.print;
+
+pub fn main() !void {
+    var x: u8 = 10;
+    {
+        defer {
+            x += 1;
+            x *= 2;
+        }
+        print("X: {}\n", .{x});
+    }
+    print("X: {}\n", .{x});
+}

defer/function.zig

@@ -0,0 +1,13 @@
+const print = @import("std").debug.print;
+
+var x: u8 = 10;
+
+pub fn main() !void {
+    foo();
+    print("X: {}\n", .{x});
+}
+
+fn foo() void {
+    defer x += 1;
+    print("X: {}\n", .{x});
+}

defer/multiple.zig

@@ -0,0 +1,11 @@
+const print = @import("std").debug.print;
+
+pub fn main() !void {
+    var x: u8 = 10;
+    {
+        defer x += 1;
+        defer x *= 2;
+        print("X: {}\n", .{x});
+    }
+    print("X: {}\n", .{x});
+}

defer/readme.md

@@ -0,0 +1,25 @@
+# Defer
+
+```bash
+$ zig run basic.zig
+X: 10
+X: 11
+```
+
+```bash
+$ zig run multiple.zig
+X: 10
+X: 21
+```
+
+```bash
+$ zig run block.zig
+X: 10
+X: 22
+```
+
+```bash
+$ zig run function.zig
+X: 10
+X: 11
+```