From 466b3d03f5a2359a63a7faa4eb110a0f1fbeafcd Mon Sep 17 00:00:00 2001
From: Luke Dashjr <luke-jr+git@utopios.org>
Date: Mon, 7 Jan 2019 16:00:34 +0000
Subject: [PATCH] CAmountMap::operator! to check if empty

---
 src/asset.cpp | 8 ++++++++
 src/asset.h   | 1 +
 2 files changed, 9 insertions(+)

diff --git a/src/asset.cpp b/src/asset.cpp
index 9831c7ea5c..70c5a91154 100644
--- a/src/asset.cpp
+++ b/src/asset.cpp
@@ -121,6 +121,14 @@ bool operator!=(const CAmountMap& a, const CAmountMap& b)
     return !(a == b);
 }
 
+bool operator!(const CAmountMap& a)
+{
+    for (const auto& it : a) {
+        if (it.second) return false;
+    }
+    return true;
+}
+
 bool hasNegativeValue(const CAmountMap& amount)
 {
     for(std::map<CAsset, CAmount>::const_iterator it = amount.begin(); it != amount.end(); ++it) {
diff --git a/src/asset.h b/src/asset.h
index 381df84c4f..483170df32 100644
--- a/src/asset.h
+++ b/src/asset.h
@@ -93,6 +93,7 @@ bool operator>(const CAmountMap& a, const CAmountMap& b);
 bool operator>=(const CAmountMap& a, const CAmountMap& b);
 bool operator==(const CAmountMap& a, const CAmountMap& b);
 bool operator!=(const CAmountMap& a, const CAmountMap& b);
+bool operator!(const CAmountMap& a); // Check if all values are 0
 
 inline bool MoneyRange(const CAmountMap& mapValue) {
     for(CAmountMap::const_iterator it = mapValue.begin(); it != mapValue.end(); it++) {