Hojun-Cho d9cfb91cb9 types: add INT/UINT limit constants, derived from size(int) (#114) ...

ww's int/uint are machine words (8B on amd64, type.c:58), not the 4B
Hare gives them on amd64 (arch+x86_64.ha maps INT_MAX->I32_MAX). So the
limits can't alias a per-arch literal; they DERIVE from size(int) the
Go way (cf math.MaxInt), staying correct on any word width:

  INT_MAX:  int  = (1 << (size(int)*8 - 1)) - 1
  INT_MIN:  int  = -1 << (size(int)*8 - 1)
  UINT_MIN: uint = 0
  UINT_MAX: uint = ~(0: uint)

All four const-fold in def-init; on amd64 they evaluate to I64_MAX,
I64_MIN, 0, U64_MAX. UINT_MAX uses the all-ones complement to dodge the
1<<64 overflow. Per the user ruling (2026-05-26): derived, not literal.

Probe 959_types_intlim_run asserts each value vs both the literal and
the i64/u64 limit const, plus wrap-through-i32 arithmetic usability.
combined.ww regenerated for all 5 selfhost tools + smoke (all embed
lib/types).

2026-05-26 08:31:41 +09:00

..

types.ww

types: add INT/UINT limit constants, derived from size(int) (#114)

2026-05-26 08:31:41 +09:00