Add missing operators

Signed-off-by: Emilio Cuesta <emiliocuesta@eprosima.com>

Author: emiliocuestaf

cpp_utils/include/cpp_utils/ReturnCode.hpp

@@ -69,6 +69,14 @@ class ReturnCode
     bool operator !=(
             const ReturnCode& c) const noexcept;
 
+    CPP_UTILS_DllAPI
+    bool operator ==(
+            const ReturnCodeValue& c) const noexcept;
+
+    CPP_UTILS_DllAPI
+    bool operator !=(
+            const ReturnCodeValue& c) const noexcept;
+
     CPP_UTILS_DllAPI
     bool operator <(
             const ReturnCode& other) const noexcept;

cpp_utils/src/cpp/ReturnCode.cpp

@@ -78,6 +78,18 @@ bool ReturnCode::operator !=(
     return value_ != c.value_;
 }
 
+bool ReturnCode::operator ==(
+        const ReturnCodeValue& c) const noexcept
+{
+    return value_ == c;
+}
+
+bool ReturnCode::operator !=(
+        const ReturnCodeValue& c) const noexcept
+{
+    return value_ != c;
+}
+
 bool ReturnCode::operator <(
         const ReturnCode& other) const noexcept
 {