Hojun-Cho fa070b6d07 wcc: tagged-union foundations (never, void, flatten, exhaust) ...

- `never` bottom type: TY_NEVER, assignable to anything; size 0.
- Type-set normalization for N_TTAGGED in resolve_type:
  - flatten nested anonymous (A|B)|C → (A|B|C); named aliases stay
    nominal (not flattened through)
  - dedup duplicates (NAMED pointer-id; others structural)
  - drop `never` variants
  - collapse single-element set: (T|never) → T, (T|T) → T
- Match exhaustiveness: error when a variant is unhandled and no
  default arm covers it. Multi-pattern `case T1 | T2 =>` counts
  each alt.
- (T | void) optionals: bare `return;` from a tagged-union-returning
  fn emits the void variant's tag (payload undefined; void size 0).

selfhost mirrored: TY_NEVER constant + tynever in tctx + seedprim
entry; voidvariantindex helper; cgreturn bare-return handling.

2026-05-12 01:31:35 +09:00

..

ascii

lib: rename stdlib surface to Hare names; add endian/math

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bufio

lib: rename stdlib surface to Hare names; add endian/math

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bytes

lib: rename stdlib surface to Hare names; add endian/math

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c/libc

ww: import toolchain — C bootstrap + ww-side self-host (phases 0-10)

2026-05-11 02:17:47 +09:00

encoding

lib: rename stdlib surface to Hare names; add endian/math

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endian

lib: rename stdlib surface to Hare names; add endian/math

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errors

lib: rename stdlib surface to Hare names; add endian/math

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fmt

lib: rename stdlib surface to Hare names; add endian/math

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hash/fnv

ww: import toolchain — C bootstrap + ww-side self-host (phases 0-10)

2026-05-11 02:17:47 +09:00

io

lib: drop snake_case from io/types/bufio/net/os exports

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math

lib: rename stdlib surface to Hare names; add endian/math

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net

lib: rename stdlib surface to Hare names; add endian/math

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os

lib: rename stdlib surface to Hare names; add endian/math

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path

lib: rename stdlib surface to Hare names; add endian/math

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sort

ww: import toolchain — C bootstrap + ww-side self-host (phases 0-10)

2026-05-11 02:17:47 +09:00

strconv

lib: rename stdlib surface to Hare names; add endian/math

2026-05-12 00:45:18 +09:00

strings

lib: rename stdlib surface to Hare names; add endian/math

2026-05-12 00:45:18 +09:00

time

ww: import toolchain — C bootstrap + ww-side self-host (phases 0-10)

2026-05-11 02:17:47 +09:00

types

lib: rename stdlib surface to Hare names; add endian/math

2026-05-12 00:45:18 +09:00

ww

wcc: tagged-union foundations (never, void, flatten, exhaust)

2026-05-12 01:31:35 +09:00

CLAUDE.md

lib: CLAUDE.md documents bootstrap-minimalism subset stance

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