spaCy/spacy/tokenizer.pxd
Adriane Boyd 5861308910 Generalize handling of tokenizer special cases
Handle tokenizer special cases more generally by using the Matcher
internally to match special cases after the affix/token_match
tokenization is complete.

Instead of only matching special cases while processing balanced or
nearly balanced prefixes and suffixes, this recognizes special cases in
a wider range of contexts:

* Allows arbitrary numbers of prefixes/affixes around special cases
* Allows special cases separated by infixes

Existing tests/settings that couldn't be preserved as before:

* The emoticon '")' is no longer a supported special case
* The emoticon ':)' in "example:)" is a false positive again

When merged with #4258 (or the relevant cache bugfix), the affix and
token_match properties should be modified to flush and reload all
special cases to use the updated internal tokenization with the Matcher.
2019-09-08 20:35:16 +02:00

39 lines
1.3 KiB
Cython

from libcpp.vector cimport vector
from preshed.maps cimport PreshMap
from cymem.cymem cimport Pool
from .typedefs cimport hash_t
from .structs cimport LexemeC, TokenC
from .strings cimport StringStore
from .tokens.doc cimport Doc
from .vocab cimport Vocab, LexemesOrTokens, _Cached
cdef class Tokenizer:
cdef Pool mem
cdef PreshMap _cache
cdef PreshMap _specials
cpdef readonly Vocab vocab
cdef public object token_match
cdef public object prefix_search
cdef public object suffix_search
cdef public object infix_finditer
cdef object _rules
cdef object _special_matcher
cpdef Doc tokens_from_list(self, list strings)
cdef Doc _tokenize_affixes(self, unicode string)
cdef int _apply_special_cases(self, Doc doc)
cdef int _try_cache(self, hash_t key, Doc tokens) except -1
cdef int _tokenize(self, Doc tokens, unicode span, hash_t key) except -1
cdef unicode _split_affixes(self, Pool mem, unicode string, vector[LexemeC*] *prefixes,
vector[LexemeC*] *suffixes)
cdef int _attach_tokens(self, Doc tokens, unicode string,
vector[LexemeC*] *prefixes, vector[LexemeC*] *suffixes) except -1
cdef int _save_cached(self, const TokenC* tokens, hash_t key,
int n) except -1