lib/std/zig/AstGen.zig                                                          | 207 +++++++-----
 lib/std/zig/Zir.zig                                                             | 143 ++++++--
 src/Sema.zig                                                                    | 566 +++++++++++++++++++++++---------
 src/Zcu.zig                                                                     | 103 +++---
 src/print_zir.zig                                                               |  79 ++++-
 test/behavior/switch.zig                                                        |  47 +++
 test/behavior/switch_loop.zig                                                   |  24 ++
 test/cases/compile_errors/switch_expression-non_exhaustive_absorbing.zig        |  31 ++
 test/cases/compile_errors/switch_expression-non_exhaustive_inline.zig           |  25 ++
 test/cases/compile_errors/switch_expression-non_exhaustive_unreachable_else.zig |  16 +
 test/cases/compile_errors/switching_with_exhaustive_enum_has___prong_.zig       |   2 +-
 test/cases/compile_errors/switching_with_non-exhaustive_enums.zig               |   4 +-
 12 files changed, 925 insertions(+), 322 deletions(-)