doc/langref.html.in     |   7 +
 src/all_types.hpp       |  54 ++++-
 src/analyze.cpp         | 337 +++++++++++++++++++++++++++++++-
 src/analyze.hpp         |   1 +
 src/codegen.cpp         | 157 ++++++++++++++-
 src/ir.cpp              | 172 ++++++++++++++--
 src/ir_print.cpp        |  22 +++
 src/zig_llvm.cpp        |   4 +
 src/zig_llvm.hpp        |   1 +
 test/cases/union.zig    |  44 +++++
 test/compile_errors.zig |   6 +-
 test/debug_safety.zig   |  20 ++
 12 files changed, 799 insertions(+), 26 deletions(-)