Crate okpyeon 

okpyeon (옥편)

Korean IME candidate data as static tables, for the two conversions every Korean input method needs when the 한자(hanja) key is pressed:

• Hanja lookup (hanja): a hangul syllable reading (독음) to its hanja candidates, each with a hun-eum gloss (훈음, e.g. "배울 학"). Like flipping through a paper 옥편.
• Special symbols (symbols, symbols_revised): the MS-IME-style consonant tables (press ㅁ then the 한자 key to pick ※ ☆ ★ …).

Word-level (multi-syllable) conversion is deliberately out of scope; every lookup key is a single char.

let candidates = okpyeon::hanja('학').unwrap();
assert_eq!(candidates[0], ('學', "배울 학"));

let shapes = okpyeon::symbols('ㅁ').unwrap();
assert!(shapes.contains(&'※'));

Data

The tables are compiled in from two libhangul data files (vendored in data/, BSD-3-Clause, see the crate README for provenance):

• hanja.txt, filtered to entries whose key and value are each a single character (multi-syllable word entries, plus two anomalous entries with multi-character values, are removed). Candidate order preserves the file order, which libhangul curates common-first (학 starts with 學 鶴 虐 …), so it is directly usable as an IME candidate list. Glosses may be empty for rare hanja.
• mssymbol.txt, the consonant-to-symbol tables replicating the Windows MS IME behavior. 18 keys exist (ㄱ-ㅎ plus ㄲ ㄸ ㅃ ㅆ; ㅉ has no assignment, faithful to MS IME). Keys are compatibility jamo (U+3131..).

No allocation, no std, no dependencies; lookups are binary searches over sorted static slices.

Functions

hanja

Looks up hanja candidates for a hangul syllable reading (독음).

symbols

Looks up the MS-IME-style special symbol candidates for a consonant.

symbols_revised

Like symbols, with the two known mssymbol.txt quirks corrected.