-php_ion_decl(type, Type);
-php_ion_decl(symbol, Symbol, php_ion_symbol_dtor(obj));
-php_ion_decl(symbol_iloc, Symbol_ImportLocation, php_ion_symbol_iloc_dtor(obj));
-php_ion_decl(symbol_table, Symbol_Table);
-php_ion_decl(decimal, Decimal, php_ion_decimal_dtor(obj));
-php_ion_decl(decimal_ctx, Decimal_Context);
-php_ion_decl(timestamp, Timestamp, php_ion_timestamp_dtor(obj));
-php_ion_decl(catalog, Catalog);
-php_ion_decl(reader_options, Reader_Options);
-php_ion_decl(reader, Reader_Reader, php_ion_reader_dtor(obj));
-php_ion_decl(writer_options, Writer_Options);
-php_ion_decl(writer, Writer_Writer, php_ion_writer_dtor(obj));
-