From 59fd7162868b6998a9674a6701fc18bbaa5fb92b Mon Sep 17 00:00:00 2001
From: Paul Hauner <paul@paulhauner.com>
Date: Wed, 20 Feb 2019 11:23:35 +1300
Subject: [PATCH] Add extra comment to ssz_derive

---
 eth2/utils/ssz_derive/src/lib.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/eth2/utils/ssz_derive/src/lib.rs b/eth2/utils/ssz_derive/src/lib.rs
index dbf7638f2..1bc5caef1 100644
--- a/eth2/utils/ssz_derive/src/lib.rs
+++ b/eth2/utils/ssz_derive/src/lib.rs
@@ -40,6 +40,10 @@ use proc_macro::TokenStream;
 use quote::quote;
 use syn::{parse_macro_input, DeriveInput};
 
+/// Returns a Vec of `syn::Ident` for each named field in the struct.
+///
+/// # Panics
+/// Any unnamed struct field (like in a tuple struct) will raise a panic at compile time.
 fn get_named_field_idents<'a>(struct_data: &'a syn::DataStruct) -> Vec<&'a syn::Ident> {
     struct_data
         .fields