Explicit-width numbersIntegers use fixed widths or the selected target's pointer width; floating-point values keep their declared size.
Structural recordsInline structs provide ordered fields, transparent aliases, and optional packed target layout.
Fixed arraysPointer-backed fixed arrays support packed storage, initialization, and unsigned indexing.
Modules and namespacesUse directives bundle source files, while reopenable namespace blocks organize functions and types.