From 61c0c6d502b19a6aa232d91a201eba9d67aced5a Mon Sep 17 00:00:00 2001
From: tgschultz <tgschultz@gmail.com>
Date: Sat, 25 Aug 2018 10:51:49 -0500
Subject: [PATCH 1/2] Fixed compile error when passing enum to fmt

Caused by struct printing behavior. Enums are different enough from structs and unions that the field iteration behavior doesn't do what we want even if @memberName didn't error on enums.
---
 std/fmt/index.zig | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/std/fmt/index.zig b/std/fmt/index.zig
index 812f5e72cd1fca587fd697f37ba6e847f6b3babb..a3d234474064d175322df78dcfc6bdc4a26e94a7 100644
--- a/std/fmt/index.zig
+++ b/std/fmt/index.zig
@@ -166,6 +166,11 @@ pub fn formatType(
 
             if (has_cust_fmt) return value.format(fmt, context, Errors, output);
             try output(context, @typeName(T));
+            if (comptime @typeId(T) == builtin.TypeId.Enum) {
+                try output(context, ".");
+                try formatType(@tagName(value), "", context, Errors, output);
+                return;
+            }
             comptime var field_i = 0;
             inline while (field_i < @memberCount(T)) : (field_i += 1) {
                 if (field_i == 0) {
-- 
2.54.0


From 2cce171448449fa107aaab1e37a8e8ee8985c6bd Mon Sep 17 00:00:00 2001
From: Andrew Kelley <superjoe30@gmail.com>
Date: Sat, 25 Aug 2018 17:28:30 -0400
Subject: [PATCH 2/2] add test for previous commit

---
 std/fmt/index.zig | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/std/fmt/index.zig b/std/fmt/index.zig
index a3d234474064d175322df78dcfc6bdc4a26e94a7..82e9a5ba399209c3ceb90aef63badcf763848583 100644
--- a/std/fmt/index.zig
+++ b/std/fmt/index.zig
@@ -939,6 +939,15 @@ test "fmt.format" {
         try testFmt("struct: Struct{ .field = 42 }\n", "struct: {}\n", value);
         try testFmt("struct: Struct{ .field = 42 }\n", "struct: {}\n", &value);
     }
+    {
+        const Enum = enum {
+            One,
+            Two,
+        };
+        const value = Enum.Two;
+        try testFmt("enum: Enum.Two\n", "enum: {}\n", value);
+        try testFmt("enum: Enum.Two\n", "enum: {}\n", &value);
+    }
     {
         var buf1: [32]u8 = undefined;
         const value: f32 = 1.34;
-- 
2.54.0