From a530eec63ea4dfcf1671c47652ff9946e935eced Mon Sep 17 00:00:00 2001
From: Niklas Adolfsson <niklasadolfsson1@gmail.com>
Date: Thu, 5 Jul 2018 11:33:17 +0200
Subject: [PATCH] ethereum-types `make it work in no_std` (#42)

* fix error on nightly

* make it work on no-std by disabling default ft
---
 src/hash.rs | 17 ++---------------
 1 file changed, 2 insertions(+), 15 deletions(-)

diff --git a/src/hash.rs b/src/hash.rs
index 1d67bed..c89a1c4 100644
--- a/src/hash.rs
+++ b/src/hash.rs
@@ -319,7 +319,7 @@ macro_rules! construct_hash {
 	}
 }
 
-#[cfg(feature="heapsizeof")]
+#[cfg(all(feature="heapsizeof", feature="libc", not(target_os = "unknown")))]
 #[macro_export]
 #[doc(hidden)]
 macro_rules! impl_heapsize_for_hash {
@@ -332,7 +332,7 @@ macro_rules! impl_heapsize_for_hash {
 	}
 }
 
-#[cfg(not(feature="heapsizeof"))]
+#[cfg(any(not(feature="heapsizeof"), not(feature="libc"), target_os = "unknown"))]
 #[macro_export]
 #[doc(hidden)]
 macro_rules! impl_heapsize_for_hash {
@@ -425,19 +425,6 @@ macro_rules! impl_std_for_hash_internals {
 	($from: ident, $size: tt) => {}
 }
 
-#[cfg(all(feature="libc", not(target_os = "unknown")))]
-#[macro_export]
-#[doc(hidden)]
-macro_rules! impl_heapsize_for_hash {
-	($name: ident) => {
-		impl $crate::heapsize::HeapSizeOf for $name {
-			fn heap_size_of_children(&self) -> usize {
-				0
-			}
-		}
-	}
-}
-
 #[cfg(all(feature="libc", not(target_os = "unknown")))]
 #[macro_export]
 #[doc(hidden)]