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feat: support enums, distinct types, unions and matching

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Valdemar Høgsvig Lorenzen
2026-10-25 23:16:09 +01:00
parent 280059d83d
commit 9966a1f523
23 changed files with 3049 additions and 176 deletions
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TODO.md
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@@ -6,9 +6,9 @@
directory packages support file-local import namespaces and postfix declaration
selection through the interpreter and native backend. concrete 8/16/32/64-bit
integers, checked numeric conversions, records/tuples, construction/defaults and
field reads/writes work through both execution paths. enums, distinct/alias types,
unions and matching remain unsupported.
integers, checked numeric conversions, records/tuples, construction/defaults,
enums, distinct/alias types, overlapping untagged/tagged unions, field reads/writes
and exhaustive statement/value matching work through both execution paths.
the driver retains frontend storage
and source provenance through `@source/compilation`, with compilation-wide AST node identities.
file commands retain single-file behavior; directory commands compile the
@@ -35,10 +35,10 @@ test discovery and FFI remain outside these completed slices.
## subsequent dependency gates
- [ ] concrete data models: required integer widths/conversions, records/tuples and construction, fields, enums, distinct/alias types, unions and matching. examples: `source/lexer/token.hon`, `source/sema/resolve.hon`, `std/mem/mem.hon`.
- [x] concrete data models: required integer widths/conversions, records/tuples and construction, fields, enums, distinct/alias types, unions and matching. examples: `source/lexer/token.hon`, `source/sema/resolve.hon`, `std/mem/mem.hon`.
- [x] native integer widths (`i8`–`i64`, `u8`–`u64`, `isize`/`usize`) and checked explicit numeric conversions, including float truncation/range checks and integer-to-float rounding. preserve exact types through arrays, calls and range captures; retain strict implicit conversion rules.
- [x] records/tuples, typed/contextual/anonymous construction, field defaults and reads/writes, nested aggregate value copies, imported record types and constructors through interpreter/native execution.
- [ ] enums, distinct/alias types, unions and matching.
- [x] nominal enums and distinct types, transparent declaration/type aliases, overlapping untagged/tagged unions, contextual payload construction, active-field checks and exhaustive scalar/enum/tagged-union matching through interpreter/native execution. pointer captures, inline specialization, sum composition and yielding value blocks remain with their respective later gates.
- [ ] memory representation: source pointers/references, mutable and sentinel slices, optionals, layout/cast builtins and allocator-required libc calls. internal IR array addresses are not source pointers. examples: `std/mem/mem.hon`, `std/arraylist/arraylist.hon`.
- [ ] fallible results and cleanup: error-set composition, `try`/`catch`, `defer`/`errdefer`; infrastructure errors remain distinct from diagnostic traps. examples: `source/main.hon:41`, `source/sema/check/check.hon:117`.
- [ ] generic specialization and compile-time execution/reflection sufficient for existing `ArrayList`, hash maps, `enummap`, `meta` and `io.print`; include type/value parameters and compile-time generated storage.