From d5efab49936a8ef4fb6af55a5f88b4bb1167f05c Mon Sep 17 00:00:00 2001
From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
Date: Sun, 17 Jan 2016 16:42:19 +0900
Subject: [PATCH] src: Add inequality operator for StringRef

---
 src/template.h       | 16 ++++++++++++++++
 src/template_test.cc |  8 ++++++++
 2 files changed, 24 insertions(+)

diff --git a/src/template.h b/src/template.h
index 82286367..f4650ad3 100644
--- a/src/template.h
+++ b/src/template.h
@@ -342,6 +342,22 @@ inline bool operator==(const char *lhs, const StringRef &rhs) {
   return rhs == lhs;
 }
 
+inline bool operator!=(const StringRef &lhs, const std::string &rhs) {
+  return !(lhs == rhs);
+}
+
+inline bool operator!=(const std::string &lhs, const StringRef &rhs) {
+  return !(rhs == lhs);
+}
+
+inline bool operator!=(const StringRef &lhs, const char *rhs) {
+  return !(lhs == rhs);
+}
+
+inline bool operator!=(const char *lhs, const StringRef &rhs) {
+  return !(rhs == lhs);
+}
+
 inline int run_app(std::function<int(int, char **)> app, int argc,
                    char **argv) {
   try {
diff --git a/src/template_test.cc b/src/template_test.cc
index df99c556..c4b7e672 100644
--- a/src/template_test.cc
+++ b/src/template_test.cc
@@ -87,6 +87,14 @@ void test_template_immutable_string(void) {
 
   CU_ASSERT("bravo" == from_lit);
   CU_ASSERT(5 == from_lit.size());
+
+  // equality
+  ImmutableString eq("delta");
+
+  CU_ASSERT("delta1" != eq);
+  CU_ASSERT("delt" != eq);
+  CU_ASSERT(eq != "delta1");
+  CU_ASSERT(eq != "delt");
 }
 
 void test_template_string_ref(void) {