* testsuite/libstdc++-prettyprinters/whatis.cc: New file.
* testsuite/lib/gdb-test.exp (whatis-test): New proc.
(gdb-test): Handle 'whatis' tests.
(gdb_batch_check): New proc.
(gdb_version_check): Rewrite to use gdb_batch_check.
* python/libstdcxx/v6/printers.py: Import gdb.types.
(FilteringTypePrinter): New class.
(add_one_type_printer, register_type_printers): New functions.
(register_libstdcxx_printers): Call register_type_printers.