Move C++ virtual destructor definition to .cpp files (#21529)

[pylaterreur]

#21529

[pylaterreur]

Also, we probably want to look at why the destructors were/are not noexcept.

And there is an actual issue with the restbed cpp generator, it's creating classes inheriting from restbedcpp "Resource" which has a delete copy ctor, but these derived class define a default copy ctor, I'm not sure how that can work. The delete copy ctor in restbed cpp has been like this for 10 years. Are there enough tests for this?

[wing328]

thanks for the pr

please follow step 3 in the pr checklist to update the samples

[pylaterreur]

thanks for the pr

please follow step 3 in the pr checklist to update the samples

That's now done, in a 2nd commit in this PR.

There is 1 file I didn't commit, however, because I don't think this is due to any code changes of mine, it's a java generated file:

index 5062b4c48e..86be74c431 100644
--- a/samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/Fruit.java
+++ b/samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/Fruit.java
@@ -30,9 +30,7 @@ import javax.annotation.Generated;
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "fruitType", visible = true)
 @JsonSubTypes({
   @JsonSubTypes.Type(value = Apple.class, name = "APPLE"),
-  @JsonSubTypes.Type(value = Banana.class, name = "BANANA"),
-  @JsonSubTypes.Type(value = Apple.class, name = "Apple"),
-  @JsonSubTypes.Type(value = Banana.class, name = "Banana")
+  @JsonSubTypes.Type(value = Banana.class, name = "BANANA")
 })
 
 @Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")```
 
My JAVA_HOME is set to be /usr/ as this is where "java" is installed on my machine
java --version
openjdk 11.0.27 2025-04-15
OpenJDK Runtime Environment (build 11.0.27+6-post-Ubuntu-0ubuntu122.04)
OpenJDK 64-Bit Server VM (build 11.0.27+6-post-Ubuntu-0ubuntu122.04, mixed mode, sharing)