.cap on a fixed-size array is invalid (Hare has no capacity-read; arrays
can't grow) -> both stages now loud-reject at the checker. wwstage was
silently returning frame garbage for a local array's .cap; cstage typed
it then vaguely rejected at use. Unified to one early checker reject with
an identical diagnostic both stages.
.ptr on a fixed-size array is ratified VALID: array.ptr is &A[0], a
sanctioned ww spelling divergence from Hare; see task #13. The toolchain
already relies on it in 14 backing-pointer sites. WHY-doc added at both
checker .ptr-on-array sites. The def-global .ptr cgen base-selection bug
(#11) is a separate following commit.
Valid-program asm unchanged (byte-id 990-997 8/8); w6c/w6c_ww binaries
move (checker code changed). test/wcc/817 table-driven, model 684.
Hojun-Cho
1c87881bda