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wordcraft/crates/engine
VoiceLessQ d2f45ddd96 Proofing: one dictionary slot for every language
Nine languages each kept their own copy of the same code: the installed
dictionary behind a lock, read on first use and logged, replaced by
install_dictionary, forgotten by reload_dictionary, and its file reported
by installed_path. The copies had drifted already. Every one documented that
a dictionary given with install_dictionary has no file and isn't reported,
but only Russian and Czech did that (#3252); the other seven reported the
disk file anyway.

`DictSlot` (proof/src/slot.rs) is that code once. It is generic over the
dictionary type, so Turkish's `TrDict` fits, and keeps the dictionary and
its in-memory origin under one lock as #3252 made it. Each language keeps
its functions as one-line wrappers over its slot, so no caller changes, and
the log lines are the same.

installed_path now follows the documented rule in every language. Nothing
outside tests installs a dictionary in memory, but tests do, concurrently,
so the dictionaries-folder tests in proof and engine could race on the
reported path of a language another test installs. They now accept the
folder's file or none there, and check that the folder is searched first
with hunspell::find, which no install affects.

Tests: proof 279, engine 927, layout 501 (lib); slot.rs has a test of its
own.
2026-10-24 19:33:17 -01:00
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