doc/langref.html.in                                           | 128 ++++++++
 lib/std/zig/Ast.zig                                           |  31 +-
 lib/std/zig/parse.zig                                         |  17 +-
 lib/std/zig/parser_test.zig                                   |   2 +
 lib/std/zig/render.zig                                        |  21 +-
 src/AstGen.zig                                                | 170 ++++++----
 src/Module.zig                                                |  16 +-
 src/Sema.zig                                                  | 531 ++++++++++++++++++++++++--------
 src/Zir.zig                                                   |  27 +-
 src/arch/x86_64/Emit.zig                                      |   2 +-
 src/print_zir.zig                                             |  15 +-
 src/stage1/all_types.hpp                                      |   1 +
 src/stage1/astgen.cpp                                         |   6 +
 src/stage1/parser.cpp                                         |  16 +-
 test/behavior.zig                                             |   1 +
 test/behavior/inline_switch.zig                               | 131 ++++++++
 test/cases/compile_errors/inline_underscore_prong.zig         |  15 +
 test/cases/compile_errors/invalid_inline_else_type.zig        |  27 ++
 test/cases/compile_errors/invalid_tag_capture.zig             |  15 +
 test/cases/compile_errors/tag_capture_on_non_inline_prong.zig |  14 +
 20 files changed, 964 insertions(+), 222 deletions(-)