doc/langref.html.in                                           |    7 +
 doc/langref/test_packed_union_equality.zig                    |   14 +
 src/Sema.zig                                                  | 1085 ++++++++++++++++----------------
 src/Type.zig                                                  |    3 +-
 src/codegen/llvm.zig                                          |    4 +-
 test/behavior/packed-union.zig                                |   20 +
 test/behavior/switch.zig                                      |  132 ++++
 test/behavior/switch_loop.zig                                 |   55 ++
 test/cases/compile_errors/switch_capture_error_by_ref.zig     |   25 +
 test/cases/compile_errors/switch_capture_packed_union_tag.zig |   15 +
 test/cases/compile_errors/switch_on_non_packed_struct.zig     |   25 +
 test/cases/compile_errors/switch_packed_exhaustion.zig        |   41 ++
 12 files changed, 892 insertions(+), 534 deletions(-)