On 04/30/2018 06:37 PM, David Malcolm wrote: > This patch updates the edit-distance algorithm in spellcheck.c to > support transpositions as well as additions/deletions/substitutions, > so that a transposition error counts as a distance of 1 rather than 2. > > This leads to saner suggestions for such cases. > > Successfully bootstrapped & regrtested on x86_64-pc-linux-gnu. > > OK for trunk? > > gcc/fortran/ChangeLog: > PR other/69968 > * misc.c (gfc_closest_fuzzy_match): Update for renaming of > levenshtein_distance to get_edit_distance. > > gcc/ChangeLog: > PR other/69968 > * spellcheck-tree.c (levenshtein_distance): Rename to... > (get_edit_distance): ...this, and update for underlying renaming. > * spellcheck-tree.h (levenshtein_distance): Rename to... > (get_edit_distance): ...this. > * spellcheck.c (levenshtein_distance): Rename to... > (get_edit_distance): ...this. Convert from Levenshtein distance > to Damerau-Levenshtein distance by supporting transpositions of > adjacent characters. Rename "v1" to "v_next" and "v0" to > "v_one_ago". > (selftest::levenshtein_distance_unit_test_oneway): Rename to... > (selftest::test_edit_distance_unit_test_oneway): ...this, and > update for underlying renaming. > (selftest::levenshtein_distance_unit_test): Rename to... > (selftest::test_get_edit_distance_unit): ...this, and update for > underlying renaming. > (selftest::test_find_closest_string): Add example from PR 69968 > where transposition helps > (selftest::test_metric_conditions): Update for renaming. > (selftest::test_metric_conditions): Likewise. > (selftest::spellcheck_c_tests): Likewise. > * spellcheck.h (levenshtein_distance): Rename both overloads to... > (get_edit_distance): ...this. > (best_match::consider): Update for renaming. > > gcc/testsuite/ChangeLog: > PR other/69968 > * gcc.dg/spellcheck-transposition.c: New test. Going to trust you've got the algorithm right :-)
OK jeff
