lib/std/zig/AstGen.zig                      | 27 ++++++-----
 test/incremental/change_bitpack_backing_int | 77 ++++++++++++++++++++++++++++++++
 test/incremental/change_enum_tag_type       | 32 +++++++++++++
 test/incremental/change_union_tag_type      | 39 ++++++++++++++++
 4 files changed, 163 insertions(+), 12 deletions(-)