allow empty structs

Author: mahkoh

active/0000-structs.md

@@ -0,0 +1,30 @@
+- Start Date: 2014-06-30
+- RFC PR #: (leave this empty)
+- Rust Issue #: (leave this empty)
+
+# Summary
+
+Allow empty structs with braces.
+
+# Motivation
+
+`struct X;` is an exception that was necessary because of ambiguous code such as `if x == X { } { ... }`.
+With [this PR](https://github.com/rust-lang/rust/pull/14885) the ambiguity no longer exists.
+
+# Detailed design
+
+Allow `struct X { }`.
+Remove or keep `struct X;`.
+Some people might want to keep `let x = X;`.
+
+# Drawbacks
+
+None that I know of.
+
+# Alternatives
+
+N/A
+
+# Unresolved questions
+
+None that I know of.