tree 4e19c1899bef5a1df550671016c4f2a9109b9228
parent f5249f509e3ab937921f37ce5a34b7c87474a087
author Kaelyn Uhrain <rikka@google.com> 1327349939 +0000
committer Kaelyn Uhrain <rikka@google.com> 1327349939 +0000

In CorrectTypo, use the cached correction as a starting point instead.

Previously, for unqualified lookups, a positive cache hit is used as the
only non-keyword correction and a negative cache hit immediately returns
an empty TypoCorrection. With the new callback objects, this behavior
causes false negatives by not accounting for the fact that callback
objects alter the set of potential/allowed corrections. The new behavior
is to seed the set of corrections with the cached correction (for
positive hits) to estabilishing a baseline edit distance. Negative cache
hits are only stored or used when either no callback object is provided
or when it returns true for a call to ValidateCandidate with an empty
TypoCorrection (i.e. when ValidateCandidate does not seem to be doing
any checking of the TypoCorrection, such as when an instance of the base
callback class is used solely to specify the set of keywords to be accepted).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148720 91177308-0d34-0410-b5e6-96231b3b80d8