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Fix and document matcher operator 'shadowing' behaviour

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This commit is contained in:
Matthew Honnibal 2017-10-16 13:38:20 +02:00
parent 748d525801
commit 56aa42cc5d
1 changed files with 22 additions and 20 deletions
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10
spacy/matcher.pyx
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@ -138,7 +138,10 @@ cdef int get_action(const TokenPatternC* pattern, const TokenC* token) nogil:
# This is a bandaid over the 'shadowing' problem described here:
# https://github.com/explosion/spaCy/issues/864
next_action = get_action(pattern+1, token)
return REPEAT if next_action is REJECT else next_action
if next_action is REJECT:
return REPEAT
else:
return ADVANCE_ZERO
else:
return PANIC
@ -228,9 +231,8 @@ cdef class Matcher:
return len(self._patterns)
def add(self, key, on_match, *patterns):
"""Add a match-rule to the matcher.
A match-rule consists of: an ID key, an on_match callback, and one or
more patterns.
"""Add a match-rule to the matcher. A match-rule consists of: an ID key,
an on_match callback, and one or more patterns.
If the key exists, the patterns are appended to the previous ones, and
the previous on_match callback is replaced. The `on_match` callback will