Delete copy construction of class java_bytecode_parse_treet.

This deletes the default copy constructors of
`java_bytecode_parse_treet`, but allows move construction.
This enforces allowing move semantics only and prevents accidental
copying.

Author: thomasspriggs

jbmc/src/java_bytecode/java_bytecode_parse_tree.h

@@ -22,6 +22,14 @@ Author: Daniel Kroening, [email protected]
 class java_bytecode_parse_treet
 {
 public:
+  // Disallow copy construction and copy assignment, but allow move construction
+  // and move assignment.
+  java_bytecode_parse_treet(const java_bytecode_parse_treet &) = delete;
+  java_bytecode_parse_treet &
+  operator=(const java_bytecode_parse_treet &) = delete;
+  java_bytecode_parse_treet(java_bytecode_parse_treet &&) = default;
+  java_bytecode_parse_treet &operator=(java_bytecode_parse_treet &&) = default;
+
   virtual ~java_bytecode_parse_treet() = default;
   class annotationt
   {