[C++][Pistache] Add comparison operators (#4619)

* [C++][Pistache] Add comparison operators

* [C++][Pistache] Update Petstore sample

Author: muttleyxd

modules/openapi-generator/src/main/resources/cpp-pistache-server/model-struct-header.mustache

@@ -24,6 +24,9 @@ struct {{classname}}
     {{^required}}Pistache::Optional<{{/required}}{{{dataType}}}{{^required}}>{{/required}} {{baseName}};
     {{/vars}}
 
+    bool operator==(const {{classname}}& other) const;
+    bool operator!=(const {{classname}}& other) const;
+
     nlohmann::json to_json() const;
     static {{classname}} from_json(const nlohmann::json& j);
 };

modules/openapi-generator/src/main/resources/cpp-pistache-server/model-struct-source.mustache

@@ -21,6 +21,16 @@ nlohmann::json {{classname}}::to_json() const
     return o;
 }
 
+bool {{classname}}::operator==(const {{classname}}& other) const
+{
+    return {{#vars}}{{baseName}} == other.{{baseName}}{{#hasMore}} && {{/hasMore}}{{/vars}};
+}
+
+bool {{classname}}::operator!=(const {{classname}}& other) const
+{
+    return !(*this == other);
+}
+
 void to_json(nlohmann::json& j, const {{classname}}& o)
 {
     {{#vars}}

samples/server/petstore/cpp-pistache/.openapi-generator/VERSION

@@ -1 +1 @@
-4.2.1-SNAPSHOT
+4.2.2-SNAPSHOT