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lib: split io empty stream into empty.ww per ref/hare/io/empty.ha

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Pure file-boundary move of lib/io/stream.ww's single 'empty stream'
banner section (_empty_read, _empty_write, _empty_vt, empty) into
lib/io/empty.ww, mirroring ref/hare/io/empty.ha. No code, name,
signature, or behavior change. Comment-only adjustments: the banner
line is deleted (the file name carries it); the moved block's
'Lives in stream.ww' self-reference now says empty.ww; stream.ww's
head drops its empty bullet (content duplicated by empty.ww's own
comments); io.ww's ownership map gains the empty.ww line; types.ww's
'three files' count becomes four. empty.ww needs no imports (package
io types only).

Makefile: lib/io/empty.ww added beside every lib/io/stream.ww
occurrence (WWFIXTURE_SRC line 75; w6c_ww/wwdump_ww bootstrap prereq
lists at lines 184/204). lib/io has no _test.ww, so no LIBRARY_TESTS
or byteid-roster change; byteid coverage rides the bootstrap gates.

Validation: out/bin/w6c lib/io/io.ww (standalone contract) exit 0;
importer tests green: bufio 26, memio 11, log 11, getopt 12 (calls
io.empty), fmt 49.
This commit is contained in:
Hojun-Cho
2026-08-08 16:46:48 +09:00
parent 34101508be
commit e5379848de
5 changed files with 41 additions and 44 deletions
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7
lib/io/io.ww
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@@ -6,9 +6,10 @@
// tagged unions instead of errno-style integer sentinels.
//
// This file owns the eof / underread variant tags; lib/io/stream.ww
// owns the `vtable` + `stream` + read/write/close dispatchers and the
// [[empty]] singleton, and lib/io/types.ww owns the error union,
// mode/whence enums, and the reader/writer/closer fn-type aliases.
// owns the `vtable` + `stream` + read/write/close dispatchers,
// lib/io/empty.ww owns the [[empty]] singleton, and lib/io/types.ww
// owns the error union, mode/whence enums, and the reader/writer/
// closer fn-type aliases.
// #94 fold-eFinal collapsed the pre-vtable `stream` struct + `closed`
// tag into the single vtable surface; the dispatchers are read/write/
// close (over `stream`), final over `handle` at io fold-2 (#5).