tree 550640c3c00d955be7395f2c39a09a08b2731d4c
parent 38668b34e62afa7fc37c4660af88870dcf291483
author yukawa@google.com <yukawa@google.com> 1422112539 +0000
committer yukawa@google.com <yukawa@google.com> 1422112539 +0000

Apply the same hack as conversion to prediction for transition cost from history node

Sometimes transition cost is too high and causes a bug Issue 274.

For example, "接続詞 が" -> "始まる 動詞,五段活用,基本形" has very large cost and "始まる" is demoted.  To prevent such cases, ImmutableConverter computes transition from BOS/EOS too; see ImmutableConverterImpl::MakeLatticeNodesForHistorySegments().

This CL introduces the same hack for DictionaryPredictor::GetLMCost so that similar language model can be applied to both suggestion candidates and conversion candidates.

Closes Issue 274.

Patch from Noriyuki Takahashi.

BUG=Issue mozc:274
TEST=unittest


git-svn-id: http://mozc.googlecode.com/svn/trunk@500 a6090854-d499-a067-5803-1114d4e51264